WO2020216835A1 - Method, device, and system for manufacturing an electric cable - Google Patents

Abstract

The invention relates to a method for manufacturing an electric cable (1), having at least two inner conductors (2) which extend from a first cable end (3) to a second cable end (4). A control unit (10) detects an actual rotation (VIST) and a target rotation (VSOLL) between inner conductor ends (2.3) of the inner conductors (2) of each cable end (3, 4). A length reduction (∆L) of the entire length (L) of the cable (1) is calculated by the control unit (10), said length reduction being required for a later adjustment of the actual rotation (VIST) to the target rotation (VSOLL), and a specified stripping length (LA), along which the inner conductors (2) are to be exposed starting at the inner conductor ends (2.3) thereof, is increased at at least one of the cable ends (3, 4) while taking into consideration the calculated length reduction (∆L) in order to at least partly compensate for the length reduction (∆L).

Description

Procedure. Device and system for assembling an electrical cable

The invention relates to a method for assembling an electrical cable, having at least two inner conductors which extend from a first cable end to a second cable end.

The invention also relates to a device for assembling an electrical cable, having a control unit which is set up to detect an actual twist and a target twist between exposed inner conductor ends exiting from a first cable end and a second cable end of inner conductors extending through the cable.

The invention also relates to a computer program product and a system for assembling an electrical cable.

When assembling cables, their conductors are typically connected with a connector in order to subsequently be able to establish electrical connections with other cables or conductors that have corresponding connectors or mating connectors. A connector or mating connector can be a plug, a built-in plug, a socket, a coupling or an adapter. The term "connector" or "mating connector" used in the context of the invention is representative of all variants.

In particular on connectors for the automotive industry or for vehicles, high demands are made on their robustness and the security of the plug connections. Electromobility in particular poses major challenges for the automotive industry and its suppliers, as high currents with voltages of up to 1,500 V are sometimes transmitted in the vehicles via the cables or lines. In the event of the risk of component failure in an electric vehicle, particularly high demands must be placed on the quality of the cables or lines and connectors.

For example, a plug connection must withstand high loads, for example mechanical loads, and remain closed in a defined manner, so that the electrical connection is not accidentally taken, for example during operation of a vehicle.

In particular, if an electrical cable is to be provided with an electrical connector at both cable ends, specifications for a target rotation between the respective connectors or an alignment of the connectors to one another must be observed as part of the cable assembly. The consideration of a target rotation in the cable assembly is particularly difficult in the context of an automated or fully automated cable assembly. Furthermore, the specifications of the cable manufacturer and safety regulations must be observed, which can limit the possibilities for twisting the inner conductors of the cable. When assembling a cable, there is usually also a need to cut and / or strip the cable and its components in a defined manner. For this purpose, stripping devices are known from the prior art, for which reference is made only by way of example to EP 1 271 729 B1 and EP 0 927 444 B1. In the known devices for stripping a cable, the cable, which is mostly a so-called endless cable, is inserted into the device. The Vorrich device has a stripping knife. The knife is used to cut or cut a cable component of the cable at a defined axial position. Then the cable is axially fed to a pulling tool with which the part of the cable component that has been at least partially separated by means of the stripping knife is pulled off.

When stripping high demands on the accuracy of the stripping lengths, along which individual cable components are exposed, must be observed, since the stripping lengths u. a. can determine the relative positions and distances of the housing components to be mounted on the cable of the later connector, which are usually subject to strict specifications.

The permissible tolerances for connectors, especially in the automotive sector, are usually very low.

Another requirement for connectors, especially for the automotive industry, is that it must be possible to manufacture them economically in large numbers. For this reason, cable assembly that is as fully automated as possible is preferable, in particular for the assembly of cables for the automotive industry. Corresponding production lines have to be established in order to achieve the required quantities with high quality at the same time.

In view of the known prior art, the object of the present invention is to provide a method for assembling an electrical cable in which, in particular, a relative orientation of electrical connectors to be mounted on the respective cable ends, preferably in the context of an automated cable assembly, can be ensured .

The present invention is also based on the object of providing a device in which, in particular, a relative orientation of electrical plug connectors to be mounted on the respective cable ends, preferably within the framework of automated cable assembly, can be ensured.

Finally, it is also the object of the invention to provide an advantageous computer program product for implementing a method for assembling an electrical cable.

In addition, it is the object of the invention to provide a system for assembling an electrical cable, in which in particular a relative orientation towards the respective cable ends assembling electrical connectors, preferably as part of an automated cable assembly, can be ensured.

The object is achieved for the method with the features listed in claim 1. With regard to the device, the object is achieved by the features of claim 19. With regard to the computer program product, the object is achieved by the features of claim 20 and with regard to the system by claim 21.

The dependent claims and the features described below relate to advantageous embodiments and variants of the invention.

A method for assembling an electrical cable is provided, the cable having at least two inner conductors that stretch from a first cable end to a second cable end.

The electrical cable is preferably designed as a high-voltage line.

The area of the electrical cable in which the processing or assembly primarily takes place is sometimes also referred to below as the "cable section to be processed". The cable section to be processed can be a cable end piece. Preferably, two cable sections of the cable, in particular both cable end pieces, are processed or assembled with a respective connector.

In particular, the invention can be provided for an automated or fully automated assembly of an electrical cable.

In principle, any electrical cable can be assembled with any connectors in the context of the invention. The electrical cable preferably has an outer conductor or is designed as a shielded electrical cable. The invention is particularly advantageously suitable for assembling electrical cables with a large cross section for high power transmission, for example in the vehicle sector, particularly preferably in the field of electromobility. An electrical cable can thus be provided for the high-voltage range, in particular a high-voltage line.

The electrical cable or the at least one electrical connector can have any number of inner conductors, for example two inner conductors or more inner conductors, three inner conductors or more inner conductors, four inner conductors or even more inner conductors. The inner conductors can run twisted through the cable, in the manner of a twisted pair cable known from telecommunications or communications engineering. The inner conductors can, however, also be routed in parallel in the cable. The electrical cable is particularly preferably designed as a cable shielded with precisely one outer conductor and with precisely two inner conductors.

In the context of the invention, an inner conductor is understood to mean in particular a line running through the cable, which consists of an insulation and an electrical conductor (wire) running within the insulation. The electrical conductor or the wire can be designed as a single wire or as a composite of several wires (also referred to as stranded wire). In principle, however, the inner conductor mentioned in the context of the invention can also consist exclusively of the electrical conductor or the wire or, in addition to the insulator, also have other components.

According to the invention, it is provided that a control unit detects an actual rotation and a target rotation between the inner conductor ends of the inner conductors of the respective cable ends.

The target rotation and the actual rotation are preferably recorded before the inner conductor ends are exposed or made accessible in a subsequent method step. Optionally, the target rotation and the actual rotation are recorded before one or more method steps for stripping a cable component.

It can also be provided that the target rotation and the actual rotation are recorded before a method step for cutting the cable or one of its components to length.

In the context of the invention, an “inner conductor end” is understood to mean the front, free end of an inner conductor. The inner conductor end can thus in particular be a front face of the inner conductor. The inner conductor end can be connected to the pure cable core, i. H. the (usually metallic) electrical conductor and / or the insulation surrounding the respective electrical conductor or the insulator (also referred to as "primary insulation").

As a rule, the inner conductors emerge individually stripped at the respective cable end from a filler layer (also referred to as an intermediate jacket or "filler") that jointly envelops the inner conductors. The inner conductors are thus exposed along a stripping length, with all inner conductors of a common cable end preferably being exposed along the same stripping length, starting from their inner conductor end.

An "actual twist" and a "nominal twist" can in particular mean a relative orientation of the inner conductors emerging from the opposite cable ends to one another. The actual rotation and / or the target rotation can in principle be arbitrary within the scope of the invention. The orientation of the inner conductors emerging from the respective cable ends can be rotated by 0 to 360 ^s . The target rotation can in particular the special cases of a rotation of the exiting inner line ter of 22, 5 ^s , 45 ^s , 60 ^s , 90 ^s , 120 ^s , 1 80 ^s , 240 ^s and 300 ^s . In principle, however, the target twist can be any.

Provision can be made for the actual rotation to be adjusted to the setpoint rotation in a later method step within the scope of the method according to the invention. Since the orientation of the inner conductor emerging from the cable ends is decisive for the assembly of the later connector or the orientation of the later connector, the orientation of the connector attached to the respective cable end can be adjusted by rotating the inner conductor emerging from the respective cable ends pretend well relative to each other.

According to the invention, it is provided that the control unit calculates an axial length shortening of the total length of the cable from the control unit due to the later adjustment of the actual twist to the target twist.

By twisting the cable ends, the actual twist can advantageously be compared to the target twist, but at the same time the "twisting" of the inner conductor shortens the axial length of the exposed inner conductor with respect to the central axis or longitudinal axis of the cable (i.e. the front distance between the inner conductor ends to the exit point of the inner conductor from a cable sheathing this component, for example the filling layer, based on the central axis of the cable). This will ultimately add to the total length of the cable; H. the distance between the inner conductor ends of the inner conductor of the first cable end and the inner conductor ends of the inner conductor of the second cable end is reduced.

According to the invention it is provided that the control unit increases a predetermined stripping length, along which the inner conductors are to be exposed starting from their inner conductor ends, on at least one of the cable ends, taking into account the calculated length reduction, in order to at least partially compensate for the length reduction.

In an advantageous manner, it can thus be ensured that the total length of the cable does not change despite the adjustment of the actual rotation to the target rotation or does not change to an extent that is practically relevant within the scope of the cable assembly or exceeds given tolerance specifications. At the same time, it can be ensured that the stripping length of the inner conductors still corresponds to the specification even after they have been twisted or rotated - at least to a practically relevant extent for maintaining the given tolerances.

The shortening in length is preferably fully compensated. However, it can also be provided that the shortening in length is only compensated to the extent that this is required within the scope of tolerance specifications for the assembly of a respective cable type and / or a respective connector type during cable assembly. Overcompensation can also be provided in principle, provided that the tolerance specifications are still adhered to. The method according to the invention is particularly advantageous for fully automated cable assembly.

Because the control unit is provided for detecting the actual rotation and the target rotation, a comparison of the actual rotation with the target rotation can advantageously take place within the scope of a device for the automated assembly of an electrical cable, in particular a device for the automated assembly of an electrical cable, which is described below . Manual intervention is then usually not necessary. At the same time, the shortening in length can be calculated and taken into account for a subsequent exposure of the inner conductor by adapting the specified insulation length accordingly.

In particular, the target rotation of the inner conductor ends can be given to the control unit as part of the cable assembly as a target for a relative orientation of the connector to be mounted on the cable ends. The control unit can thus detect the target rotation, for example, by means of a user interface or some other data interface.

The actual rotation can also be specified for the control unit by means of a user interface or some other data interface. Preferably, the control unit determines the actual rotation by means of a sensor device and / or on the basis of a cable database (including manufacturer information on the twisting of the inner conductor over the length of the cable).

A detection of the actual rotation and / or the target rotation can relate to the detection of an analog or digital numerical value within the scope of the invention. This also applies to the calculation of the shortened length and the adjustment of the stripping length.

In an advantageous development of the invention, it can be provided that the predetermined stripping length along which the inner conductor is to be exposed is proportionally increased for the respective cable end, taking into account a defined tolerance.

The stripping length can thus result from the specified stripping length plus a proportional length shortening +/- the defined tolerance for the cable end.

It can be provided that the specified stripping length and / or the adapted stripping length of the exposed inner conductors are identical at both cable ends. The specified stripping length and / or the adapted stripping length can, however, also differ from one another at the two cable ends. Provision can be made for the shortening of the length to be taken into account by extending the specified stripping length on one of the cable ends or on both cable ends. Even if the shortening in length is only due to the twisting of one of the cable ends, the required extension can be distributed over both cable ends if necessary. As a rule, however, a length shortening is corrected (proportionally) at the end of the cable where it is (proportionally) triggered by the twisting.

The extension of the specified stripping length at one of the cable ends can in particular take place as a direct function of the rotation provided in each case.

The defined tolerance can be met in particular with regard to the cable type to be assembled and / or the respective connector.

According to a further development of the invention, it can be provided that the length reduction is taken into account in order to specify the axial setpoint position of a cable-side end of a housing component of an electrical connector that accommodates the inner conductor along the central axis of the cable. In other words, the length shortening is taken into account to determine an axial setpoint position along the central axis of the cable of a cable-side end of a housing component of an electrical connector that accommodates the inner conductors.

Compensating for the shortened length according to the invention can be particularly advantageous, since the stripping length generally determines the position of housing components of the electrical connector to be mounted on the cable with respect to the central axis of the electrical cable. Thus, the relative alignment of connector components to one another can differ due to the shortening of the length, for example the position of a housing component in relation to a support sleeve attached to the cable sheath of the cable. Such a deviation can be avoided or compensated for in accordance with the invention, in particular within the framework of predetermined tolerances.

The housing component can, for example, be a contact part carrier of the later electrical connector. The contact part carrier can also be referred to as an inner housing or inner housing shell.

As a rule, the inner conductors are stripped in the area of the inner conductor ends in order to connect the electrical conductor to suitable contact elements ("inner conductor contact elements"). The contact elements are usually pressed or crimped onto the conductors as part of the cable assembly. The contact part carrier finally has corresponding receptacles for receiving the contact element or elements. The inner conductors can thereby rotatably received in the contact part carrier who the. A rotation of the inner conductor with the contact part carrier attached to the inner conductor changes the axial position of the contact part carrier due to the shortening of the length and moves the sen in the direction of the opposite cable end.

In principle, by adapting the specified stripping length according to the invention, in addition to the change in length caused by the rotation, other sources of error or tolerance can be taken into account in order to specify the axial target position for a housing component of the connector as precisely as possible.

According to a further development of the invention, it can be provided that only the intended stripping length of the inner conductor to be exposed at the first cable end is increased if only a rotation of the first cable end is provided or only the intended stripping length of the inner conductor to be exposed at the second cable end is increased, if only a twisting of the second cable end is provided.

As a rule, it can be advantageous to compensate for the shortening in length directly at the causal cable end, in particular if the axial target position of housing components on the cable is to be corrected. If, on the other hand, it is only a matter of shortening the overall length of the cable, a length shortening in the area of the second cable end caused by twisting the first cable end can also be compensated - and vice versa. However, the respective cable ends are preferably considered individually or separately.

In a further development of the invention it can be provided that both the intended stripping length of the inner conductor to be exposed at the first cable end and the intended stripping length of the inner conductor to be exposed at the second cable end is increased if both cable ends are rotated.

In principle, however, it can also be provided that a length shortening caused by twisting both cable ends is taken into account by adapting the intended stripping length on only one of the two cable ends.

In a development of the invention it can be provided that the control unit only determines a twist at the cable ends if the actual twist of the inner conductor ends at the two cable ends deviates by more than 90 degrees from the target twist.

As a rule, it can reduce the effort for cable processing if the actual rotation is matched to the target rotation by only twisting one of the two cable ends as part of the assembly of the electrical cable. Since it is usually only a matter of relative orientation the inner conductor ends emerging from the respective cable ends arrive, a twisting of the inner conductor ends at only one cable end can in principle also be sufficient.

However, provision can also be made to reduce the mechanical load on the electrical cable, for example mechanical tension, by twisting or twisting the twist by dividing the twist between the two cable ends, in particular when a comparatively large twist (e.g. by more than 90 °) is required.

In an advantageous development of the invention, it can be provided that the control unit takes into account an elasticity-related reverse rotation of the inner conductor ends when aligning the actual rotation with the target rotation when calculating the length reduction.

Because the electrical cable usually has various elastic components, for example a cable sheath made of a soft plastic, the rotation can at least partially turn back after the contact part carrier has been secured to the cable sheath in a secure manner. In order to ensure that the actual rotation still corresponds to the target rotation even after the contact part carrier has been secured against rotation - if necessary within a possible tolerance range - it can be provided that the inner conductor ends are rotated further than is basically predetermined by the target rotation. The actual rotation can thus be adjusted to the target rotation by initially "overcompensating" for the actual rotation.

When calculating the length reduction, it can accordingly be taken into account that the reverse rotation also reduces the effect of the length reduction.

In a further development of the invention it can be provided that the inner conductors run through the cable in a twisted manner and the control unit takes into account a twist in the inner conductor to determine the actual rotation.

The essential dimension in electrical cables with twisted or "stranded" inner conductors running through the cable is the so-called "twist" (also referred to as twist length, twist pitch or lay length). This is the pitch or pitch of the helix that results from the twisting of the inner conductor.

Taking into account the twist of the inner conductor, with a known cable length, the actual twist of the inner conductor ends between the two cables can be recorded, provided the orientation of the inner conductor at one of the cable ends is known, for example detected by measurement or by targeted alignment of the inner conductor ends one of the cable ends is specified. Provision can be made for the twist to be determined by measurement or experiment. This can be advantageous in order to record any tolerances in cable production that lead to a deviation in the twist (local or global). For example, it can be provided that the twist of the "endless cable" wound on a cable reel, from which the cables to be assembled are unrolled and cut to length, to be detected beforehand, since it can generally be assumed that the twist is within a cable reel wound production unit remains approximately constant. However, provision can also be made for the twist of the endless cable wound on the cable reel to be detected several times or for the twist to be detected separately for each electrical cable cut to length.

An optical, inductive, capacitive or other metrological detection of the twist can be provided. In particular, test cuts can be provided through the endless cable rolled up on the cable reel.

In an advantageous development of the invention, it can be provided that the inner conductors are exposed by removing a portion of at least one cable component of the cable that envelops the inner conductor.

In the context of the invention, the cable component can be any cable component.

In the context of the invention, the term "section" denotes the separated or at least partially separated axial section of the cable component. The length of the section corresponds to the Abiso lierlänge, which is usually specified and which can be extended in the context of the invention, taking into account the length reduction.

The section can be completely or partially withdrawn from the electrical cable. In principle, a distinction can be made between a so-called full deduction and a partial deduction. A full peel is understood to mean that the stripped piece or section of the cable component (i.e. the "stripping residue") is completely stripped from the cable. In the case of a partial withdrawal, the section cut off is only withdrawn from the cable over a certain axial length and thus still remains on the cable. The partially withdrawn section can then be withdrawn completely in a subsequent process step. The partial withdrawal has the advantage that the cable end remains protected during further transport and also during storage and, for example, further cable components are prevented from splicing at the cable end.

In an advantageous development of the invention it can be provided that the inner conductors are exposed by stripping a section of the cable sheath of the cable and / or by stripping a section of the outer conductor of the cable or by folding it back over the cable sheath and / or by stripping a portion of a dielectric filling layer which jointly envelops the inner conductors.

The cable component according to the invention can thus in particular be the cable sheath of the cable, the filling layer, the insulation that individually envelops a respective inner conductor, and / or another dielectric of the cable.

In the context of the invention, however, any cable component can in principle be stripped, for example a cable film or an outer conductor of the cable, e.g. B. a braided cable shield.

Preferably, the inner conductors are exposed along the stripping length or the increased stripping length according to the invention by first stripping a section of the cable sheath of the cable, after which a section of a cable shielding braid of the cable is then stripped and the remaining part backwards over the cable sheath, for example via a support sleeve , is turned over, and then a section of the filling layer is stripped.

According to the invention, the length of the sections can in each case be increased in order to at least partially compensate for the shortening in length. However, it can also be provided that only the length of the part of the filling layer is increased accordingly.

In an advantageous development of the invention it can be provided that at least one knife, preferably at least one shaped knife or a circular knife, is used to expose the inner conductor in order to produce a radial incision in the cable component of the cable.

The knife can also be referred to as a "stripping knife". It can be provided that the knife is rotated or unrolled around the cable along the circumference of the cable or the cable component in order to produce the radial incision. In principle, alternatively or in addition, provision can be made for rotating the cable. As a rule, however, the cable is not rotated.

The knife can be advanced towards the central axis on the cable in order to produce a radial incision in the cable component of the cable at a defined axial position. The position of the incision can be determined by the stripped length and thus, according to the invention, be specified by the control unit, taking into account the shortening of the length.

The shape of the knife can run round or elliptically, for example in the cutting area or on its blade, in order to at least approximately follow the contour of the cable or the cable component. In principle, however, a straight cutting edge / blade or a straight knife can also be provided. A circular knife can also be provided which has a completely round blade. The blade can be freely rotatably mounted on the knife in order to be able to unroll on the cable (in principle, however, a non-rotatable blade or a driven blade can also be provided). In particular, a freely rotatable circular knife can cut into the cable component in a particularly advantageous and controlled manner during a rotation around the cable. In particular, a cable component made of silicone, for example a cable sheath made of silicone, can be particularly advantageously cut by a circular knife.

Provision can be made to first remove the cable jacket from a cable in order to expose an outer conductor or a shield, for example a braided cable shield of the cable. The outer conductor can then be removed, preferably axially offset in the longitudinal direction or the feed direction along the central axis. Finally, preferably again axially offset in the longitudinal direction or in front of the advancing direction of the cable, an insulation or a dielectric arranged below the outer conductor can be removed in order to make the inner conductor of the cable accessible for the cable assembly. The cable can therefore be stripped in several stages in the longitudinal direction or the feed direction - in each case, partially or completely, taking into account the shortening in length.

It can thus be provided that one or more cable components of the cable are stripped, the length shortening preferably being taken into account and at least partially compensated for, at least with regard to the cable component directly enveloping the inner conductor.

It can thus be provided that insulation is stripped at several points on the cable and / or in several incision depths sequentially, that is to say in several work steps one after the other. However, it can also be provided that insulation is stripped or sheathed at several points on the cable and / or in several depths of incision simultaneously, that is, in one work step, in which case a corresponding number of axially offset knives can be provided.

In a further development of the invention it can be provided that to expose the inner conductor at least one counter-holder is used which is positioned opposite the knife and which fixes the cable during the incision.

The counter holder can form a system adapted to the outer diameter of the cable component and / or a conically tapering system.

The abutment of the counter bracket can have a pure V-shape or any tapering shape into which a cable can be inserted, preferably in the manner of a two-point bracket. A tapered system is particularly suitable for holding cables with different cable diameters. The counter holder can have a slot into which the knife can penetrate. As a result, the device can be substituted for different cable types, in particular with different cable diameters.

It can also be provided that the abutment of the counter-holder is formed by rolling or by a Gleitflä surface. The use of rollers or a sliding surface can be advantageous, since this keeps friction of the cable to a minimum, in particular during the rotation of the counter-holder around the cable.

It can be provided, for example, that the counter holder has at least four rollers to form the system, the rollers being arranged on two axes running parallel to one another and at least two rollers being arranged on the same axis, two rollers being arranged on the same axis have an axial distance from one another in order to form the slot for the penetration of the knife.

The axes for the rollers preferably run in the axial or feed direction of the cable.

In order to be able to strip a large number of different types of cables and cable diameters, it can be advantageous if the knife can penetrate the counter holder to different depths. When using rollers, a configuration with four rollers can be advantageous, since a corresponding slot can then be made technically simply between two rollers. Alternatively, it is of course also possible to provide only two rollers on two axes running parallel to one another, the rollers having one or more slots.

It can also be provided that the counter holder has exchangeable rollers. When using a counter-holder, which has a technically simple possibility for exchanging rollers, the device can easily be adjusted to different types of cables and / or cable diameters.

In particular, it can be provided that the counter holder can be advanced towards the cable in the direction of the central axis.

Because the counter holder can also be moved radially in the direction of the central axis in addition to the knife, the cable can be positioned and fixed even better during processing. The cut in the cable can thus be made even more precisely. In an advantageous manner, it may not be necessary to additionally provide a guide and / or complex centering for the cable to align it before the incision. In principle, however, a separate guide and / or a separate fixation can also be provided for the cable, regardless of whether the counter holder can be advanced or not. It can be provided that the counter-holder is radially removed from the central axis during the conveyance or the feed movement of the cable by the transport device in such a way that the cable does not touch the counter-holder during the conveyance.

A corresponding offset of the counter-holder to the central axis while the cable is being conveyed can be advantageous, since this avoids friction between the cable and the counter-holder.

However, it can also be provided that the counter-holder rests against the cable while the cable is being conveyed by the transport device and that the latter is preferably positioned coaxially to the central axis of the rotary head. The counter holder can thus be used as a guide for the cable.

An immovable positioning of the counter-holder can be advantageous because then no or only simple means for adjusting the counter-holder in order to position it once for the stripping process of a cable type are required.

It can be provided that the counter holder is initially mechanically positioned before the start of the stripping process, in particular for a new cable. For the initial calibration of the device for different cable types and / or cable diameters, a mechanical adjustment by hand can also be provided in a simple embodiment.

However, it can also be provided that the counter holder is basically immovable on the rotary head.

It can also be provided that the counterholder forms a stop for the knife or that the knife forms a stop for the cable in order to limit the maximum depth of the radial incision in the cable component.

A stop of the counter-holder can be an advantageous way of avoiding damage, for example scratching, to another component of the cable located under the cable component. The knife or part of the cutting edge / blade of the knife or some other part of the knife can thus advantageously strike the counterholder or an area of the counterholder even before the knife has completely cut through the section. The stop of the counter holder can optionally also be adjustable or adjustable. For example, the stop can be adjusted by means of an adjusting screw or be designed as an adjusting screw.

However, it can also be provided that the knife itself forms or has a stop in order to limit the cutting depth. The stop can for example be made of a plastic or a metal, for example aluminum. In the case of a linear knife with a straight blade or a shaped knife with a blade shape that is at least partially adapted to the cable component to be cut, provision can be made to clamp the front cutting area of the blade at a defined distance from a knife holder. In a similar way, a cutting depth limitation for a circular knife can be implemented by, for example, arranging a cylindrical stop with a smaller radius than the blade coaxially adjacent to the blade.

In a particularly preferred variant of the process step of exposing the inner conductor, it can be provided that a corresponding stripping device has a rotary head rotatable about a central axis, on which the knife and the counter holder for the cable are arranged opposite one another and aligned with the central axis.

The cable can then be guided in the stripping device along the central axis.

The knife and the counter-holder can preferably be arranged on a radial line or on a straight line which extends through the central axis of the rotary head. In the event of a linear movement of the knife and / or the counter-holder, these can consequently move directly towards or away from one another.

It can thus advantageously be provided that the knife cuts the cable circumferentially or all around due to the rotation of the Rota tion head, whereby the section of the cable component can be particularly easily and reliably removed from the cable.

In particular, a radially circumferential incision can be produced by the rotation of the rotary head. Radially circumferential incision is to be understood in particular to mean that the cable component is incised circumferentially in such a way that an annular section of the cable component or the part can then be pulled off the cable in the longitudinal direction.

In principle, it can be provided that the rotary head rotates continuously during the entire process. However, it can also be provided that the rotary head only rotates when the knife is positioned to cut the cable.

It can be provided that the knife is rotated at least one complete revolution around the cable in order to produce a completely circumferential incision. In order to improve the result even more, however, it can also be provided that the knife is rotated by more than 360 degrees around the cable. At the same time, if necessary, the knife can also be advanced further and further radially or continuously radially while the rotary head is rotating. However, only a partially circumferential incision can also be provided, for example one or more webs between the individual partially annular incisions can remain.

According to a development of the invention it can be provided that at least one pulling tool is used to expose the inner conductor, which engages in the incision made by the knife in order to at least partially pull the stripped section off the cable.

Advantageously, the cutting edge of the knife can be very thin and the area of the pulling tool with which the pulling tool engages in the incision can be comparatively wide, which on the one hand simplifies processing and prevents damage to the cable and its components. The cutting edge of the knife is thus preferably thinner than the engagement area of the pulling tool with which the pulling tool engages in the incision.

It should be emphasized that the knife and the at least one extractor tool are preferably independent assemblies within the scope of the invention.

The pulling tool can be designed as a molding tool which is adapted to an inner diameter of the cable component.

It can be provided that the section is not completely separated by the radial incision, for example in order to avoid the knife cutting completely radially through the cable component and possibly damaging the components of the cable below. It may already be sufficient to only have one predetermined breaking point, e.g. B. to generate a circumferential groove and subsequently "tear off" the section by means of the at least one pulling tool.

The pulling tool can basically be designed similar to the knife or a shaped knife, in contrast to the shaped knife or knife, however, a thicker cutting edge / blade aufwei sen.

As a rule, there is no provision for cutting into the cable component using the pulling tool. The pulling tool is only intended to dip into the cut already made by the knife and thus to generate a corresponding form fit with the cable component in order to subsequently pull off the section or, if necessary, also to tear off / cut off.

In particular, two extraction tools can be provided, a first extraction tool being arranged opposite a second extraction tool. In the context of the variant of the invention, according to which the knife and the counter holder are arranged on the rotary head, it can also be provided that the at least one pulling tool is also arranged on the rotary head and can be advanced towards the central axis of the cable. The pulling tool can be positioned in relation to the knife in such a way that the pulling tool for pulling off the section of the cable component engages in the incision made by the knife when the pulling tool is delivered to the cable.

The knife and the at least one extractor tool can be arranged next to one another on the rotary head and be equally spaced from an end face of the rotary head. The counter holder can also be positioned accordingly.

The knife and the at least one extraction tool can be arranged on the rotary head in such a way that they assume the same axial position along the cable when they are advanced to the cable or to the central axis - without the cable having to be axially repositioned.

Because the knife and the pulling tool are arranged together on the same rotary head, the cable does not have to be repositioned after cutting by means of the knife and fed to the pulling tool (or vice versa). The position of the incision made by means of the knife is thus clearly known relative to the rotary head. As a result, the pulling tool can be aligned so precisely that it can ideally engage in the incision in order to pull the part off the cable. Even with large tolerances in the cable geometry, exact engagement of the pulling tool in the incision can be guaranteed according to the invention.

In this way, in particular, an axial setpoint length of the sections can also be specified very precisely, which is why the shortening in length can be compensated for with particular precision by adjusting the actual rotation to the setpoint rotation.

It has also been shown that due to the almost ideal alignment of the knife and the pulling tool through the joint positioning on the rotary head, the radial incision depth of the knife in the cable component can be reduced, as the part can be reduced by the ideal engagement of the pulling tool in the incision itself can then be reliably pulled off or severed / torn off if the knife has not completely cut through the cable component. By reducing the incision depth, damage to cable components located under the section can be excluded, even in the case of cables that are comparatively non-round due to tolerance.

In an advantageous manner, the incision depth can be selected as a function of the cross section of the cable component in such a way that after the incision there is still a narrow partial ring that connects the section to the rest of the cable component. It can thus be provided that a groove, in particular a completely circumferential groove - and thus a predetermined breaking point - be made in the cable component, in which the pulling tool can later engage to pull off the section. It can be provided that the rotary head stands still while the part is pulled off by the pulling tool.

In principle, however, it can also be provided that the rotary head rotates (further) while the part is being pulled off by the at least one pulling tool. The rotation of the Rotationskop fes is not necessary during the removal and can possibly also lead to a "tilting" of the at least one removal tool in the and thus apply undesirable forces and vibrations to the device and / or the cable. As a rule, it is for this reason that the rotary head stands still during the removal.

It can be provided that the rotary head is designed as a disk and a belt drive is provided for rotating the disk.

A design of the rotary head as a disk has proven to be particularly suitable for feeding the knife and optionally the counter holder radially. Furthermore, a disc can be rotated particularly easily, whereby the knife and the counter holder can also be rotated in a particularly simple manner around the central axis and thus around the cable to be cut.

A rotation of the disk can be carried out particularly advantageously via a belt drive. An electric motor can be coupled to the pulley via a belt drive. A belt of the belt drive is preferably driven by an output shaft of the electric motor and the belt is tensioned around the circumference of the pulley in order to drive it, whereby a particularly suitable translation can also be achieved.

The rotary head can be driven by a belt drive without the need for a complex construction; in particular, sliding electrical contacts and the like can be dispensed with.

The counter holder can preferably be detachably connected to the rotary head, as a result of which the device can be adapted quickly and easily to a wide variety of cable types and / or cable diameters. The knife can also be exchangeable in a modular manner.

Provision can be made for a respective link device and / or a respective rail system to be provided for delivering the knife, the counter holder and / or the at least one pulling tool to the cable.

The use of a link device is a technically reliable measure for the transmission of mechanical movements. It can be provided that a first link device has a link with a guide track and a transmission member in order to transfer a movement of the link into a radial movement of the knife.

It can also be provided that a second link device has a link with a guide track and a transmission member in order to transfer a movement of the link into a radial movement of the counter-holder.

It can also be provided that a third link device has a link with a guide track and a transmission member in order to transfer a movement of the link into a radial movement of the pulling tool. In the case of several pulling tools, corresponding additional link devices can be provided. A common actuation of the Abziehwerkzeu ge via a common link device can be provided.

It can also be advantageous to operate the counterholder, the knife and / or the at least one extractor tool directly via actuators, the actuators being able to be fastened to the rotary head, for example (if a rotary head is provided).

Furthermore, a rail guide for the knife, the counter holder and / or the at least one pulling tool can be advantageous.

Preferably, two pulling tools can be provided, with a first pulling tool being arranged opposite a second pulling tool, and wherein the pulling tools are aligned with the central axis.

With a linear movement of the two extractor tools, these can consequently move directly towards or away from one another.

The extractor tools are preferably arranged on a radial line or on a straight line which extends through the central axis of the rotary head (if a rotary head is provided).

The alignment of the two extractor tools is preferably rotated by 90 ° to the arrangement of the knife and the counter holder on the rotary head. As a result, the space on the rotary head can be used as optimally as possible. In principle, however, it can also be provided that the extraction tools are offset by an angle other than 90 ° to the alignment of the knife and the counter holder. It can be provided that the cable is fed linearly along the central axis by a transport device before the incision is made in the stripping device.

The rotary head can have a central bore through which the cable can advantageously be passed. As a result, the length of the section can be adjusted more flexibly, since the front end of the cable can then dip through the bore. Furthermore, the knife, the counterholder and the at least one extraction tool can then be fastened axially closer to the rotary head, which can further reduce the susceptibility of the device to tolerances and further improve the compensation for the shortening of the length.

In an advantageous manner, after the at least one pulling tool has been delivered, the cable can be at least partially pulled out of the stripping device against a feed direction along the central axis in order to pull the section at least partially off the cable (pull off part) or pull it completely off the cable ( Full deduction).

The transport device for feeding the cable for stripping can thus advantageously also be used for pulling off the section after the at least one pulling tool has been delivered into the incision or engages in the incision.

In an advantageous development of the invention, it can be provided that the actual rotation is adjusted to the target rotation by twisting the inner conductors on at least one of the cable ends, and the twisting being fixed by a contact part carrier receiving the inner conductor ends on the assigned cable end electrical connector to be mounted is fixed against rotation on a cable sheath of the cable.

In particular, it can be provided in an advantageous development that the contact part carrier is secured against rotation by pressing the contact part carrier onto the corresponding cable end and / or by mounting a shielding sleeve on the contact part carrier so that it cannot rotate and is pressed onto the corresponding cable end.

The contact part carrier can thus be pressed, preferably crimped, directly onto the corresponding cable end, for example. However, it can also be provided that the contact parts carrier is only indirectly attached to the corresponding cable end by z. B. a shield sleeve is mounted on the contact parts carrier, for example pushed in a predetermined orientation and then the shield sleeve is pressed, preferably crimped, with the corresponding cable end.

The shielding sleeve can also be referred to as a “ferrule” (or outer ferrule) and is generally provided in order to electromagnetically surround the contact part carrier, particularly in the area of the contact elements shield. For the non-rotatable fastening on the contact part carrier, the contact part carrier and shielding sleeve can have a corresponding mechanical coding, for example a locking lug on the one hand and a corresponding locking groove on the other. The shielding sleeve can be pushed onto the contact parts carrier, for example, only in a predetermined orientation or in two orientations.

The shielding sleeve has preferably already been pushed onto the electrical cable or its cable sheath from the front and, after the contact part carrier has been mounted, can be pushed from the rear, i.e. H. starting from the cable jacket, pushed over the contact part carrier or otherwise attached to this.

According to a development of the invention it can be provided that the inner conductors are rotated on at least one of the cable ends by rotating the cable end.

For example, the cable sheath can be rotated ver in the region of the cable end by means of an actuator device. Preferably, the contact part carrier can be held in a twist-proof manner, as a result of which the inner conductors, starting from the respective cable end from which they emerge, twist up to the loading area in which they are inserted into the contact part carrier. This changes the relative orientation of the inner conductor ends accommodated in the contact part carrier to the inner conductor ends of the opposite cable end, so that the actual rotation can be adjusted to the target rotation. The inner conductor can thus be rotated using simple means. At the same time, however, the axial position of the contact part carrier shifts along the central axis of the cable, which according to the invention can, however, be compensated for.

Rotating the end of the cable while fixing the contact part carrier at the same time can be advantageous, since the absolute orientation of the contact part carrier in the device for assembling the cable does not change, which can be advantageous for the (subsequent) cable processing, for example sliding on a shielding sleeve , especially in the context of an automated cable assembly. Subsequent process steps or devices / modules can thus be constructed more simply because they can start from a defined, predetermined orientation of the contact part carrier.

According to a development of the invention it can also be provided that the inner conductors are rotated at at least one of the cable ends by twisting the contact part carrier together with the inner conductor ends received in the contact part carrier.

Since the inner conductor ends are received in the contact part carrier, a rotation of the inner conductor ends or an adjustment of the actual rotation to the target rotation can also be achieved by rotating the Contact part carrier advantageously take place. Preferably, the cable sheath can be held in the area of the corresponding cable end at the same time against rotation.

According to a further development of the invention, it can also be provided that the inner conductors are twisted on at least one of the cable ends by the shielding sleeve mounted on the contact part carrier so that it cannot rotate and is rotated together with the contact part carrier and the inner conductor ends recorded in the contact part carrier.

It can be advantageous to first mount the shielding sleeve on the contact part carrier and then rotate it together with the contact part carrier in order to also indirectly rotate the inner conductor ends in order to match the actual rotation to the target rotation. Preferably, the cable jacket can be held at the same time secure against rotation in the region of the corresponding cable end.

In particular, if the shield sleeve can only be mounted in one or in two defined orientations on the contact parts carrier, it can be advantageous not to rotate the contact parts carrier relative to the shield sleeve at first, as this can make it more difficult to automatically slide the shield sleeve on in the correct orientation . The problem can be avoided by twisting the shield sleeve and contact part carrier together (or twisting the cable end).

In one embodiment, it may also be provided, if necessary, to first secure the shielding sleeve in a rotationally secure manner on the cable end, for example to press it, preferably to crimp it, then to twist it and then again, starting from the front, free end of the shielding sleeve, the contact part carrier in one defined orientation in the shielding sleeve and at the same time feed the inner conductor ends into the corresponding receptacles of the contact part carrier.

However, this procedure is generally rather expensive to implement and therefore not preferred. However, the principle can be suitable in special cases.

In an advantageous development of the invention it can be provided that first the first cable end is assembled with a first connector and then the second cable end with a second connector.

By sequentially processing the cable ends, components of the device for assembling the electrical cable or process steps for assembling the electrical cable can advantageously be reused. In principle, however, simultaneous processing of the first cable end and the second cable end can also be provided in order to increase the processing speed for the entire cable or the throughput. In the context of the invention, for example, it can also be provided that the length shortening caused by the later twisting of the first cable end is initially taken into account and at least partially compensated when machining the first cable end, and in a second machining pass the length shortening by the later turning of the second Take the cable end into account (if the second cable end is to be twisted) and at least partially compensate for it when processing the second cable end.

In an advantageous development of the invention it can be provided that the control unit controls an actuator device in order to effect the previously determined rotation.

The actuator device can be communicatively connected to the control unit.

Furthermore, the control unit can be communicatively connected to at least one stripping device or control it in order to provide the stripping device with the stripping length modified according to the invention.

It can be provided that at least after a stripping process or after the inner conductor has been exposed, a cleaning process is carried out, after which particles adhering to the cable end are removed.

Particles include metallic particles, non-metallic particles, fibers (in particular plastic fibers), pieces of film (a metallic film, a non-metallic film or a composite film) and dust particles. A powdered mineral, for example talc, can also be treated as particles for the purposes of the invention. In particular, particles or fibers from metal chips, resins, plastics, minerals or dust can advantageously be removed.

Thus, the technical cleanliness can advantageously be established in the context of the assembly of the electrical cable, in particular in the context of an automated or fully automated assembly of an electrical cable, by running a corresponding cleaning process after stripping.

The removal of the particles can be advantageously provided in particular before the application of components of a later plug connector within the framework of the system for assembling the cable, which will be described later.

The invention also relates to a device for assembling an electrical cable, having a control unit which is configured to capture an actual rotation and a target rotation between inner conductor ends of inner conductors extending through the cable at the respective cable ends. The control unit is also set up to compensate for a later adjustment of the actual rotation to calculate the axial length shortening of the total length of the cable due to the nominal rotation. Furthermore, the control unit is set up to increase a specified stripping length, along which a stripping device is able to expose the inner conductor starting from the inner conductor ends, on at least one of the cable ends, taking into account the calculated length reduction, in order to at least partially compensate for the length reduction.

Because the inner conductor is twisted on at least one cable end of the electrical cable as part of the adjustment of the actual rotation to the target rotation, the axial length of the inner conductor ends or the distance between the front, free end of the respective inner conductor and its exit point from the cable end are shortened based on the central axis or longitudinal axis of the electrical cable. Since the inner conductor ends are usually received in the contact part carrier (or another housing component of the later connector), the axial position of the contact part carrier (or the other housing component) along the central axis or longitudinal axis of the electrical cable, which is in the frame the assembly of further components of the electrical connector can possibly be problematic, since exact rela tive distances between the components of the connector to each other and to the cable end must often be observed during assembly.

It can thus be advantageous to take into account the axial length reduction of the inner conductor ends in advance and to increase the specified stripping length accordingly.

It can be provided that the device has the stripping device.

In addition, it can be provided that the device has a transport device for linearly conveying the cable in a feed direction in order to deliver the cable along the central axis in the stripping device.

The transport device can, for. B. have a roller conveyor with one, two or even more rollers to guide the electrical cable linearly between the rollers. A belt conveyor or other conveying device can also be provided in order to deliver the cable and / or the Abisoliereinrich device.

The device can also have a device for adjusting the actual rotation to the target rotation. In particular, the device can have an actuator device that is communicatively connected to the control unit and is set up to twist the inner conductor on at least one of the cable ends in order to match the actual twist to the target twist according to the control unit's specifications.

The device can also have a pressing tool which is designed to mount a contact part carrier of a contact part carrier that accommodates the inner conductor on the assigned cable end. Renden electrical connector on a cable sheath of the cable to be fixed against rotation in order to fix the rotation.

It can be provided that the method described above is carried out using the device mentioned.

The device is preferably designed for automated or fully automated cable assembly.

The invention also relates to a computer program product with program code means in order to carry out a method according to the preceding and following statements when the program is executed on a control unit of a device for assembling an electrical cable.

The control unit can be designed as a microprocessor. Instead of a microprocessor, any other device for implementing the control unit can be provided, for example one or more arrangements of discrete electrical components on a printed circuit board, a programmable logic controller (PLC), an application-specific integrated circuit (ASIC) or another programmable circuit, for example also a Field Programmable Gate Array (FPGA), a programmable logic arrangement (PLA) and / or a commercially available computer.

The invention also relates to a system for assembling an electrical cable, in particular a high-voltage line. The system comprises a device for assembling an electrical cable, preferably in accordance with the information above and below. The system further comprises at least one module, which is independent of the device, for assembling the electrical cable.

The distribution of the processing steps according to the invention over several independent modules makes it possible to operate the system as an "assembly line process" or as a "cycle machine" with successive individual steps in order to reduce the processing time for mass processing.

Furthermore, the device or the individual modules can have a modular structure, whereby individual modules of the assembly can be replaced, modified or removed without much effort. In this way, the system can be configured with simple means, especially for processing different types of cables.

The independent modules can preferably be arranged upstream or downstream of the device.

In a further development of the invention, it can be provided that at least one of the independent modules can be used as a module for aligning and orienting the electrical cable and / or as a module for stripping a section of a cable component of the cable and / or as a module for removing removing a cable foil from a front end of the cable and / or as a module for processing a cable shielding braid of the cable and / or as a module for mounting a support sleeve on the front end of the cable and / or as a module for mounting a housing component of a electrical connector's rule, in particular a contact part carrier, is formed.

It is also possible to provide further modules which are independent of one another and of the device and are arranged upstream or downstream of the device.

The invention also relates to an electrical cable processed by a method according to the preceding and subsequent embodiments.

The invention also relates to an electrical cable which has been processed with a device and / or a system according to the statements above and below.

Features that have been described in connection with the method according to the invention can of course also be implemented advantageously for the device, the computer program product and the system - and vice versa. Furthermore, advantages that have already been mentioned in connection with the method according to the invention can also be understood in relation to the device, the computer program product or the system - and vice versa.

In addition, it should be pointed out that terms such as “comprising”, “having” or “with” do not exclude any other features or steps. Furthermore, terms such as “a” or “the” which refer to a single number of steps or features do not exclude a plurality of features or steps - and vice versa.

In a puristic embodiment of the invention, however, it can also be provided that the features introduced in the invention with the terms “comprising”, “having” or “with” are finally enumerated. Accordingly, one or more lists can be regarded as complete within the scope of the invention, for example each endeavored for each patent claim. The invention can consist exclusively of the features mentioned in claim 1, for example.

It should also be emphasized that the values and parameters described here have deviations or fluctuations of ± 10% or less, preferably ± 5% or less, more preferably ± 1% or less, and very particularly preferably ± 0.1% or less of the respectively named Include values or parameters, provided that these deviations are not excluded when implementing the invention in practice. The specification of ranges by start and end values also includes all those values and fractions that are included in the respective named range, in particular the start and end values and a respective mean value. Exemplary embodiments of the invention are described in more detail below with reference to the drawing.

The figures each show preferred exemplary embodiments in which individual features of the present invention are shown in combination with one another. Features of an exemplary embodiment can also be implemented separately from the other features of the same exemplary embodiment and can accordingly be easily combined with features of other exemplary embodiments by a person skilled in the art to form further useful combinations and sub-combinations.

In the figures, functionally identical elements are provided with the same reference symbols.

They show schematically:

FIG. 1 shows an exemplary two-core electrical cable in a side view;

FIG. 2 shows the electrical cable of FIG. 1 in a front view;

FIG. 3 shows the first end of the electrical cable of FIG. 1 after the inner conductor has been twisted and the resulting length is shortened;

FIG. 4 shows a device for adapting the actual rotation to the target rotation;

FIG. 5 shows an exemplary displacement of the axial position of a housing component along the central axis of the cable due to the shortening of the length;

FIG. 6a shows a stripping device for cutting and pulling off a section of a cable component in a perspective view;

FIG. 6b shows a further stripping device for cutting and pulling off a section of a

Cable component in perspective view;

FIG. 7 shows the rotary head of the stripping device according to FIG. 6 in a perspective view;

FIG. 8a shows a shaped knife for stripping a filler layer that jointly envelops the inner conductors;

FIG. 8b shows a further advantageous knife for stripping a filler layer that jointly envelops the inner conductors; FIG. 9 shows a flow chart relating to the detection of the actual rotation and the setpoint rotation and the adjustment of the actual rotation to the setpoint rotation;

FIG. 10 shows a flow chart of a method according to the invention for assembling the electrical cable; and

FIG. 11 shows a system for assembling a multi-core electrical cable with a device for assembling the electrical cable and further modules that are independent of the device.

In Figure 1 is an example of a multi-core electrical cable 1 in a side view enlarged Darge provides. FIG. 2 shows a front view of the electrical cable 1. The problem of adapting the actual rotation V _{| ST} to the setpoint rotation V _SO LL will first be described with reference to FIGS. 1 and 2.

As shown in Figure 1, the inner conductors 2 each extend from a first cable end 3 to a second cable end 4. The multi-core electrical cable 1 shown is already partially pre-assembled. The cable 1 has a cable sheath 5 and a braided cable 6 running under the cable sheath. A shielding film (not shown) can optionally run above the cable shielding braid 6. Underneath the braided cable shield 6, the inner conductors 2 run within a filling layer 7. The two inner conductors 2 each have an electrical conductor 2.1 or a wire that is encased by an insulation 2.2. In the course of the preceding assembly steps, the electrical conductors 2.1 of the inner conductors 2 have already been exposed in the area of the inner conductor ends 2.3 at both cable ends 3, 4.

The inner conductor ends 2.1 of the second cable end 4 are indicated by dashed lines in FIG.

The inner conductor contact elements 8 are then attached to the exposed conductors 2.1, in particular crimped (for the upper inner conductor 2 of the first cable end 3 shown in FIG. 1 by way of example). Furthermore, the braided cable shield 6 at the first cable end 3 was reversed to the rear over the cable jacket 5, preferably over a metal sleeve or support sleeve (not shown) and optionally fixed with a fabric tape 9. The right cable end shown in FIG. 1 (in this case the second cable end 4) is still unprocessed except for the exposure of the inner conductor 2 and the stripping of the conductor 2.1 in the area of the inner conductor ends 2.3.

The two-core cable 1 shown in the exemplary embodiment is only to be understood as an example for use with the invention. In principle, the invention is suitable for use with any Cable type, for example also for use with an electrical cable 1 with more than two inner conductors 2.

In the present case, the inner conductors 2 run twisted through the cable 1, which is why, depending on the cable length L in the unprocessed state, an actual rotation V _{| ST} between the cables from the respective cable end 3,

4 exiting inner conductor ends 2.3 is present. According to the invention, the actual rotation V _{| ST} is detected by a control unit 10 (see FIG. 4 and FIG. 7). In addition, the control unit 10 detects the Sollverdre hung V _SO LL for the inner conductor ends 2.3 exiting from the respective cable end 3, 4.

As part of the assembly of the cable 1, provision can be made for the actual rotation V _{| S} T to be adjusted to the target rotation VSOLL by rotating the inner conductors 2 at at least one of the cable ends 3, 4. The rotation can then be fixed, for example in that a contact part carrier 11 (cf., for example, FIGS. 4 and 5) applied to the inner conductor ends 2.3 is secured to the cable sheath 5 so that it cannot rotate.

By adjusting the actual rotation V | _S T to the setpoint rotation V _S OLL, the total length L of the cable 1 is shortened, as can be seen when comparing FIGS. 1 and 3. As an example, a length shortening AL caused by the twisting of the first cable end 3 is shown in FIG. 3, which on the one hand affects the total length L of the cable 1 and shortens it accordingly and on the other hand also affects the lengths of individual sections of the cable 1, for example the specified ne stripping length L _A , along which the inner conductors 2 were exposed starting from their inner conductor ends 2.3. In order to take into account the shortening in length AL when the inner conductor 2 is exposed, it is provided that the control unit 10 calculates the axial length shortening AL caused by the later adjustment of the actual twist V IST to the target twist V _S OLL in advance, before the inner conductor 2 arrives the corresponding cable end 3, 4 are actually exposed. The length shortening AL can thus be taken into account and the stripping length along which the inner conductors 2 are exposed starting from their inner conductor ends 2.3 can be increased (for example by the length shortening AL) in order to at least partially compensate for the length shortening AL.

The specified stripping length L _A can be increased proportionally for the respective cable end 3, 4 by the calculated length reduction AL, possibly with a view to defined tolerances. In principle, it can be desirable to fully compensate for the shortening in length AL. Partial compensation can, however, also be sufficient if it is still within defined tolerance ranges.

It can be provided that only the predetermined stripping length L _{A of} the inner conductor 2 to be exposed is increased at the first cable end 3 if only a rotation of the first cable of FIG. 3 is provided. Accordingly, it can also be provided that only the specified stripping length ge L _{A of} the exposed inner conductor 2 at the second cable end 4 is increased if only a rotation of the second cable end 4 is provided. If both cable ends 3, 4 are rotated, provision can also be made to enlarge the predetermined stripping lengths L _A at both cable ends 3, 4. In particular, if only the total length L of the cable 1 is important, the compensation of the shortening AL can be distributed independently of the twist to one of the cable ends 3, 4 or to both cable ends 3, 4.

FIG. 4 shows a device 12 for assembling the contact part carrier 11 and for adjusting the actual rotation V | _S T indicated by way of example at the setpoint rotation V _S OLL.

The device 12 has an actuator device 13 which is communicatively connected to the control unit 10 and is set up to twist the inner conductor 2 at at least one of the cable ends 3, 4 in order, according to the specifications of the control unit 1 0, the actual rotation V _{| ST} to the Target rotation V _SO LL to be adjusted. A rotatable actuator device 13 with clamping jaws 14 that can be advanced to the contact part carrier 11 is shown as an example. Furthermore, cable clamping jaws 15 are shown for fixing the electrical cable 1 to its cable jacket 5 in the region of the first cable end 3 in order to fix the electrical cable 1 in a rotationally secure manner while the contact part carrier 1 1 is rotated. The Aktuatoreinrich device 13 for rotating the contact part carrier 11 may be an actuator device 13 which is basically also used for linearly pushing the contact part carrier 11 onto the inner conductor contacts 8.

The device 12 can also have a pressing tool 16, which is designed to secure the contact part carrier 1 1 on the cable sheath 5 of the cable 1 against rotation in order to fix the rotation. The pressing tool 16 shown in Figure 4 is especially designed to To crimp the shielding sleeve 17 (shown in dashed lines) after mounting on the contact part carrier 1 1 in the area of the folded cable shielding braid 6. The shielding sleeve 17 is already pushed onto the cable jacket 5 as part of a pre-assembly and can be pushed onto the contact part carrier 11 from behind in the corresponding orientation after the contact part carrier 11 has been rotated.

In principle, the contact part carrier 1 1 can be secured against rotation by being pressed directly onto the corresponding cable end 3, 4, for example directly or indirectly on the cable jacket 5, preferably on a support sleeve or a support sleeve (not shown here) that is attached to the cable jacket 5 Cable shielding braid folded back over the cable jacket 5 6.

Particularly preferably, however, it is provided that the contact part carrier 1 1 is fixed indirectly to the cable sheath 5 of the associated cable end 3, 4 by the dashed-line shield sleeve 17 mounted on the contact part carrier 1 1 and on the corresponding cable end 3, 4, for example on the support sleeve, not shown, or the folded over Kabelschirmge braid 6 is pressed, preferably crimped.

With regard to the adjustment of the actual rotation V | _S T at the setpoint rotation V _S OLL it can be provided that the cable end 3, 4 is rotated, the contact part carrier 1 1 being held so that it cannot rotate. As an alternative or in addition, it can also be provided that the contact part carrier 1 1 is rotated together with the inner conductor ends 2.3 received in the contact part carrier 1 1 and / or that the shielding sleeve 17 is mounted on the contact part carrier 1 1 in a non-rotatable manner and together with the contact part carrier 1 1 and the inner conductor ends 2.3 received in the contact part carrier 1 1 is rotated.

The shielding sleeve 17 and the contact part carrier 11 preferably have a mechanical coding so that they can only be connected to one another in one or in two defined orientations. For example, a latching lug 18 and a latching groove 19, as indicated for example in FIG. 4, can be provided.

In order to reduce the mechanical load on the electrical cable 1, it can be provided that the control unit 10 determines a rotation of both cable ends 3, 4, in particular if the actual rotation V IST of the inner conductor ends 2.3 at the two cable ends 3, 4 by more than 90 ^s the target twist VSOLL deviates. The control unit 10 can also perform a reverse rotation V _{R of} the inner conductor ends 2.3 due to elasticity when the actual rotation V | Take _S T into account for the target rotation V _S OLL. The actual rotation V _{| ST} can thus be matched to the desired rotation V _SO LL by initially being overcompensated up to a rotation from the desired rotation V _SO LL plus a reverse rotation V _R (see FIG. 2). With regard to the calculation of the length reduction AL, the reverse rotation V _{R is} then advantageously ignored since the partial length reduction caused by the overcompensation is also compensated for by the elasticity-related reverse rotation.

In order to detect the actual rotation V _{| ST} , it can also be advantageous if the control unit 10 takes into account a twist in the inner conductor 2 which was previously determined, for example, by measurement or experiment. Taking into account the cable length L of the electrical cable 1, after detecting the orientation of the inner conductor ends 2.3 on one of the two cable ends 3, 4, the orientation of the inner conductor 2 on the opposite cable end 3, 4 can be calculated.

With regard to the length shortening AL, it can be particularly problematic that the axial posi tion of the inner conductor 2 receiving housing components (for example, the contact part carrier 1 1) of the later connector 20 (see. Figure 1 1) with respect to the central axis M of the Ka bels 1 can affect.

In an advantageous manner, the shortening of length AL can thus be taken into account within the scope of the invention, in order to achieve an axial setpoint position PSOLL of a cable-side end 21 of an inner conductor 2. taking housing component, for example the contact part carrier 1 1, along the central axis M of the cable 1 or to correct. The problem of influencing the axial setpoint position PSOLL is shown by way of example in FIG. 5 for the contact part carrier 11.

It can be seen that the position of the rear or cable-side end 21 of the contact part carrier 11 is moved closer to the opposite cable end 4 due to the rotation or adjustment of the actual rotation V _{| ST} to the target rotation V _SO LL. The relative position of the cable-side end 21 of the contact part carrier 11 to defined axial positions P ^ along the central axis M or structures of the cable 1 can thus deviate from a specification. The four positions P_ ₄ shown in FIG. 5 are only to be understood as examples. For example, the axial target position PSOLL of the contact part carrier 11 relative to a support sleeve applied to the cable jacket 5 of the cable 1 is often relevant for the connector assembly and must be adhered to within specified tolerances. This can be ensured by taking account of the shortening AL according to the invention.

The inner conductor 2 can be exposed within the scope of the invention by removing a portion of at least one cable component of the cable 1 that encloses the inner conductor 2. For example, a portion of the cable jacket 5 of the cable 1 can be stripped and / or a portion of the outer conductor 6 of the cable 1 can be stripped or folded back over the cable jacket 5 and / or a portion of the dielectric filler layer 7 that jointly envelops the inner conductor 2 can be stripped will.

To expose the inner conductor 2, a stripping device 22 can be provided, which is shown by way of example in FIG. 6a. FIG. 6b shows a further stripping device 22 in a particularly preferred embodiment. Because of their similarities, both exemplary embodiments are described together below.

In principle, the stripping device 22 can be constructed as desired. A plurality of Abiso facilities 22 with identical or different structures can also be provided. For example, a respective stripping device 22 can be provided for each section of the cable 1 to be removed. The structure described below is only to be understood as an example.

The illustrated stripping device 22 has a rotary head 23 which can be rotated about a central axis M and which is shown enlarged in detail in FIG. 7 for clarity. The rotary head 23 is designed as a disk, a belt drive 24 being provided for rotating the rotary head 23 (see FIG. 7).

In order to introduce the cable 1 into the stripping device 22 along the central axis M, the stripping device 22 shown in FIGS. 6a and 6b each has a transport device 25 for linearly conveying the cable 1 along a feed direction R. The transport device 25 consists of both playfully composed of two transport units 25.1, 25.2 separated in the feed direction R. The rotary head 23 can be arranged behind the transport units 25.1, 25.2, as shown in FIG. 6a, in particular if the cable 1 has already been cut to length and fed to the rotary head 23 with its end to be processed for stripping. The rotary head 23 can, however, preferably be arranged between the transport units 25.1, 25.2, as shown in FIG. 6b. The cable 1 can then first be cut to length and then stripped before geous.

In particular, if components of the stripping device 22 are described below that are arranged on the rotary head 23, they can also be used in the context of a stripping device 22 that does not have a rotary head 23 but, for example, only has a rigid attachment for the respective components.

To expose the inner conductor 2 along the predetermined or extended stripping length L _A , at least one knife 26 can be used in order to produce a radial incision in the cable component of the cable 1. Furthermore, a counter holder 27 positioned opposite the knife 26 can be used, which fixes the cable 1 during the incision.

In the exemplary stripping device 22, a knife 26 and a counter holder 27 for the cable 1 are arranged opposite one another and aligned with the central axis M on the rotary head 23 (see in particular FIG. 7). FIG. 6b shows the rotary head 23 only in a simplified representation, according to which only the knife 26 is shown mounted on the rotary head 23. The knife 26 can be advanced towards the central axis M of the cable 1 in order to generate a ra-media incision in the cable component of the cable 1, for example in the cable sheath 5, at a defined axial position.

In the exemplary embodiment, the knife 26 is designed as a shaped knife. The knife 26 can, however, in principle have any cutting edge. The knife 26 can, for example, also have a linear structure or a straight cutting edge. A circular knife can also be provided. The circular knife can in particular be mounted without a drive and freely rotatable in order to be able to roll around the cable 1 on the cable 1 during a Dre hung.

The counter holder 27 forms a system adapted to the outer diameter of the cable component. The counter holder 27 can in principle form any desired system, in particular a tapering system, for example a V-shaped system or a system formed by rollers. In the exemplary embodiment, the counter holder 27 can also be advanced towards the central axis M on the cable 1. In principle, however, the counter holder 27 can also be arranged immovably (on the rotary head 23). In order to create a cutting depth limitation, the counter holder 27 can be designed in such a way that it forms a stop for the knife 26. The maximum depth of the radial incision in the cable component can thereby be limited and damage to other components of the cable 1 located under the cable component can be prevented. Alternatively or in addition, the knife 26 itself can also have or form a stop for the cable 1 to limit the cutting depth.

In principle, it can be provided that the knife 26 does not completely cut off the cable component or the section and, for example, leaves behind individual webs or a radial inner ring. The section may therefore initially not be completely separated by the radial incision.

The rotary head 23 preferably rotates (see FIG. 7) while the knife 26 makes the incision in order to produce a radially completely circumferential incision.

It can further be provided that the stripping device 22 for exposing the inner conductor 2 has at least one pulling tool 28 which engages in the incision made by the knife 26 in order to at least partially pull the stripped section off the cable 1.

In the exemplary embodiment, two pulling tools 28 are arranged on the rotary head 23, the pulling tools 28 being positioned in relation to the knife 26 in such a way that they engage in the incision made by the knife 26 to pull off the section of the cable component when the pulling tools 28 hit the cable 1 are delivered. The pulling tools 28 are arranged opposite one another and each aligned with the central axis M. As shown, the extractor tools 28 are preferably arranged offset by 90 ^s with respect to the knife 26 and the counter holder 27. In principle, however, the two pulling tools 28 can be arranged at any desired angle relative to the orientation of the knife 26 and the counter holder 27.

Similar to the knife 26, the pulling tools 28 can also be designed as shaping tools, in particular to be adapted to the inner diameter of the cable component. The Abziehwerkzeu ge 28 can, however, also be linear.

The pulling tools 28, the knife 26 and the counter holder 27 are arranged next to each other on the Rotati onskopf 23 and each spaced equidistant from an end face of the rotary head 23 in order to approach the same axial point on the central axis M in the case of a radial infeed, as in FIG 7 indicated by dashed lines.

To feed the knife 26, the counter-holder 27 and / or the at least one pulling tool 28 to the cable 1, a respective link device can be provided (not shown in more detail) represents). However, a rail system can also be provided. Corresponding rails 29 are indicated on the rotary head 23 in FIG.

The rotary head 23 is preferably stationary while the section is withdrawn by the at least one extraction tool 28. To pull off the section, the cable 1 can be at least partially pulled out of the stripping device 22 again after the pulling tools 28 have been delivered against the feed direction R along the central axis M in order to pull the section at least partially (partial pull) or completely (full pull) off the cable 1 .

As already mentioned, the stripping device 22 can, however, also be designed without a rotary head 23. For example, a rotary head 23 may not always be suitable for stripping a particular cable component. For example, a shaped knife 26 specially adapted to the geometry of the cable 1 can be provided for stripping the insulation from the filling layer 7, as indicated in FIG. 8a. In order to strip the insulation from the filling layer 7, two opposing shaped blades 26 are preferably provided in the manner as shown in FIG. 8a, which can be adjusted radially in the direction of the central axis M of the cable 1 in order to cut into the filling layer 7. The form knife 26 can have a respective semicircular recess for each inner conductor 2 of the cable 1; In the exemplary embodiment, two semicircular recesses are provided, since the exemplary cable 1 has two inner conductors 2.

Any other knife 26, for example a knife 26 shown in FIG. 8b, which does not follow the negative of the inner conductor 2 arranged in the filling layer 7, can also be provided for stripping the insulation from the filling layer 7. By way of example, the knife 26 has a V-shaped cutting edge. A second, identically or similarly designed knife 26 can cut into the cable 1 from the opposite side. The filling layer 7 can then be torn off at the incision points or at the remaining webs in order to completely separate the portion of the filling layer 7 to be stripped. In this variant, it can be a particular advantage that the orientation of the knife 26 does not have to be adapted to the orientation of the inner conductor 2 in the cable 1.

FIG. 9 shows, by way of example, a process sequence within the framework of the process for assembling the cable 1, for example the cable 1 shown in FIGS. 1 to 3, in particular within the framework of an automated or fully automated system.

In a first method step S1, the electrical cable 1 with its first cable de 3 can first be fed to a device 30 according to the invention or a system 31 (cf. also FIG. 11) for processing.

In a second method step S2, the control unit 10 can grasp the actual rotation V _{| ST} and the desired rotation V _SO LL between the inner conductor ends 2.3 emerging from the respective cable ends 3, 4. In a third method step S3 it can be determined whether the setpoint rotation V _S OLL deviates from the actual rotation V _{| S} T by more than 90 ^s .

If this is the case, provision can be made in a fourth method step S4 to rotate the inner conductors 2.3 of the first cable end 3 in order to initially at least partially match the actual rotation V _{| ST} to the setpoint rotation V _SO LL.

In a fifth method step S5, which, if the target rotation V _S OLL deviates by less than 90 ^s from the actual rotation V _{| S} T, can immediately follow the third method step S3, the contact part carrier 11 on the cable jacket 5 of the cable 1 be determined. The first cable end 3 can then be completely assembled with the first plug connector 20, for example.

The axial length reduction AL of the total length L of the cable 1 caused by the adjustment of the actual rotation V _{| ST} to the target rotation V _SO LL can be calculated in advance by the control unit 10 in order to expose the inner conductor 2 accordingly, taking into account the length reduction AL (in the process sequence according to Figure 9 not shown).

In a subsequent, second processing pass, provision can also be made for the second cable end 4 to be assembled. For this purpose, in a sixth method step S6, provision can be made for the electrical cable 1 to first be folded over or turned over in order to lead the second cable end 4 to the device 30 according to the invention and, if necessary, further modules of a corresponding system 31.

The actual rotation V _{| ST} and the desired rotation VSOLL can then be recorded by the control unit 10 in a seventh method step S7.

In a subsequent eighth method step S8, it can be detected whether the setpoint rotation V _S OLL already corresponds to the actual rotation V _{| S} T.

If this is not the case, provision can be made in a ninth method step S9 to rotate the inner conductors 2.3 of the second cable end 4 in order to adjust the actual rotation V _{| ST} to the setpoint rotation V _SO LL. This rotation can also be determined beforehand in order to take into account the resulting axial length shortening AL of the total length L of the cable 1 and to expose the inner conductor 2 of the second cable end 4 for a correspondingly longer period. In a tenth method step S1 0, the contact part carrier 1 1 can be secured against rotation on the Kabelman tel 5, optionally after the rotation according to method step S9 or immediately after method step S8.

The method shown by way of example can be executed as a computer program product with program code means on the control unit 10.

In FIG. 10, the device 30 for assembling the electrical cable 1 is indicated, which has a control unit 10 which is set up to carry out the method already described.

The device can be designed to cut the electrical cable 1 to length and / or to expose its cable components in one of the processing steps preceding the rotation or the adaptation of the actual rotation VIST to the target rotation V _S OLL due to the subsequent rotation of the inner conductor 2 conditional length shortening AL must already be taken into account and the electrical cal cable 1 and / or the inner conductor 2 designed accordingly longer in order to obtain the desired total length L of the cable 1 or the specified length dimensions. A process sequence according to the invention is also indicated in FIG.

In a first processing step B1, an actual rotation V | _ST and a target rotation V _SO LL between inner conductor ends 2.3 of the inner conductors 2 of the respective cable ends 3, 4 are recorded.

In a subsequent, second processing step B2, an axial length shortening AL of the total length L of the cable 1 caused by a later adjustment of the actual rotation V IST to the setpoint rotation V _SO LL is calculated.

Finally, in a third processing step B3, the specified stripping length L _A , along which the inner conductors 2 are exposed starting from their inner conductor ends 2.3, is increased at at least one of the cable ends 3, 4, taking into account the calculated length reduction AL, in order to at least partially reduce the length compensate. The inner conductor ends 2.3 can be exposed longer.

Further processing steps can then follow in the course of assembling the electrical cable 1.

Finally, in a fourth processing step B4, the actual rotation V _{| ST is} adjusted to the target rotation V _SO LL.

Further process steps can then follow. Basically, it should be mentioned that the flowcharts or method sequences of FIGS. 9 and 10 shown in the context of the exemplary embodiment are only to be understood as examples. In particular, individual process steps can be further subdivided or also combined. Furthermore, further process steps not mentioned can be provided.

FIG. 11 shows a system 31 for assembling the electrical cable 1. The system 31 comprises the device 30 for assembling the electrical cable 1 as well as further modules 32, 33, 34 that are independent of the device 30 for assembling the electrical cable 1.

In principle, the independent modules can be any modules for assembling electrical cables 1; only a few exemplary modules 32, 33, 34 are shown in FIG. The order of processing or the arrangement of the modules may also differ. Furthermore, further modules can be added or existing modules 32, 33, 34 can be separated or combined.

The section of the system 31 shown in FIG. 11 shows a first module 32 which is designed as a module for isolating a portion of the cable jacket 5 of the cable 1.

The first module 32 is followed by the device 30 according to the invention, which in the exemplary embodiment is used as an example in addition to calculating the length reduction AL and taking it into account to expose the inner conductor 2. The inner conductors 2 are thus exposed in accordance with the increased stripping length.

In a second module 33 arranged downstream of the device 30, the inner conductor contact elements 8 are crimped onto the stripped or exposed conductors 2.1 of the inner conductors 2. In a third module 12 following the second module 33, the actual rotation V _{| ST} is matched to the target rotation V _SO LL by rotating the inner conductors 2 on at least one of the cable ends 3, 4. The rotation is fixed in that the contact part carrier 11 of the electrical plug connector 20 to be mounted on the associated cable end 3, 4 is secured to the cable sheath 5 of the cable 1 so that it cannot rotate. Here for the shield sleeve 17 is pushed onto the contact part carrier 11 from behind.

In a fourth module 34 following the third module 12, the shielding sleeve 17 is crimped to the cable jacket 5.

Any further modules can then follow, for example to assemble further housing components in order to finally apply the desired connector 20 to the cable 1. In the exemplary embodiment, a transport unit 35 is provided in order to provide the Kabelab to be processed section of the cable 1 to the individual modules 32, 33, 34 or to the device 30 one after the other. Depending on the number of items to be produced, the transport unit 35 can also be omitted. The cables 1 or the cable sections can in this case also be transported between the individual modules 32, 33, 34 or the device 30 by a production employee, for example also with the aid of a roller conveyor. The transport unit 35 is preferably designed in the form of a workpiece carrier system or an assembly line and transports several cables 1 from module to module in order to utilize all modules 32, 33, 34, 30 as permanently as possible and thus achieve a high throughput in cable processing. A gripping device or some other transport system can also be provided in order to transport the cable 1 between individual modules 32, 33, 34 or between different groups of modules 32, 33, 34. The cable 1 can be transported individually or together with a cable carrier, not shown.

The transport unit 35 can have one or more gripping devices 36 or workpiece carriers in order to fix one or more cables 1 for transport or for processing through the modules 32, 33, 34, 30, for example also to fix them so that they cannot rotate. The gripping devices 36 can also be designed to deliver the cable 1 or at least the cable section to be processed to the module 32, 33, 34, 30 for processing after a module 32, 33, 34, 30 has been approached, in particular to the corresponding modules 32, 33, 34, 30 to be introduced.

Claims

Patent claims 1. A method for assembling an electrical cable (1), comprising at least two inner conductors (2), which extend from a first cable end (3) to a second cable end (4), after which a control unit (10) an actual rotation (V _{| ST} ) and a target rotation (V _SO LL) between inner conductor ends (2.3) of the inner conductor (2) of the respective cable ends (3, 4), whereby a later adjustment of the actual rotation (V _{| ST} ) to the target rotation (V _SO LL) conditional axial length shortening (AL) of the total length (L) of the cable (1) by the control unit (10) is calculated, and with a predetermined stripping length (L _A ) along which the inner conductor (2) starting from the inner conductor ends (2.3) are to be exposed, at least one of the cable ends (3, 4) is enlarged, taking into account the calculated length reduction (AL), in order to at least partially compensate for the length reduction (AL). 2. The method according to claim 1, d a d u r c h e k e n n n z e i c h n e t that the specified stripping length (L _Ä ) along which the inner conductor (2) are to be exposed is increased proportionally for the respective cable end (3, 4), taking into account a defined tolerance. 3. The method according to claim 1 or 2, d a d u r c h e k e n n n z e i c h n e t that to determine an axial setpoint position (P _S OLL) along the central axis (M) of the cable (1) of a cable-side end (21) of a housing component (11) of an electrical connector (20) that accommodates the inner conductor (2), the length shortening (AL ) is taken into account. 4. The method according to any one of claims 1 to 3, d a d u r c h e k e n n n z e i c h n e t that only the intended stripping length (L _A ) of the inner conductor to be exposed (2) on the first cable de (3) is increased if only a twisting of the first cable end (3) is provided or only the intended stripping length (L _A ) of the inner conductor to be exposed (2) is increased at the second cable end (4) if only a twisting of the second cable of the (4) is provided. 5. The method according to any one of claims 1 to 3, d a d u r c h e k e n n n z e i c h n e t that both the intended stripping length (L _A ) of the inner conductor (2) to be exposed on the first cable end (3) and the intended stripping length (L _A ) of the inner conductor (2) to be exposed the second cable end (4) is increased when a rotation of both cable ends (3, 4) is seen before. 6. The method according to any one of claims 1 to 5, d a d u r c h e k e n n n z e i c h n e t that the control unit (10) determines a rotation of both cable ends (3, 4) only if the actual rotation (V _{| ST} ) of the inner conductor ends (2.3) at the two cable ends (3, 4) is more than 90 degrees from the target rotation ( V _SO LL) deviates. 7. The method according to any one of claims 1 to 6, d a d u r c h e k e n n n z e i c h n e t that the control unit (10) takes into account an elasticity-related reverse rotation (V _R ) of the inner conductor ends (2.3) when aligning the actual rotation (V _{| ST} ) with the target rotation (V _SO LL) when calculating the length reduction (AL). 8. The method according to any one of claims 1 to 7, d a d u r c h e k e n n n z e i c h n e t that the inner conductors (2) run twisted through the cable (1) and the control unit (10) takes into account a twist in the inner conductor (2) to determine the actual twist (V _{| ST} ). 9. The method according to any one of claims 1 to 8, d a d u r c h e k e n n n z e i c h n e t that the inner conductors (2) are exposed by removing a section enveloping the inner conductors (2) at least one cable component (5, 6, 7) of the cable (1). 10. The method according to claim 9, d a d u r c h e k e n n n z e i c h n e t that the inner conductors (2) are exposed by isolating a section of the cable jacket (5) from the cable (1) and / or by stripping a section of the outer conductor (6) of the cable (1) or backwards over the cable jacket (5) is folded over and / or by stripping a portion of a dielectric filler layer (7) which jointly envelops the inner wire (2). 11. The method according to claim 9 or 10, d a d u r c h e k e n n n z e i c h n e t that for exposing the inner conductor (2) at least one knife (26), preferably at least one shaped knife, is used to produce a radial incision in the cable component (5, 6, 7) of the cable (1). 12. The method according to claim 11, characterized in that to expose the inner conductor (2) at least one counter-holder (27) positioned opposite the knife (26) is used, which fixes the cable (1) during the incision. 13. The method according to claim 11 or 12, d a d u r c h e k e n n n z e i c h n e t that to expose the inner conductor (2) at least one pulling tool (28) is used, which engages in the incision made by the knife (26) to pull the stripped section at least partially from the cable (1). 14. The method according to any one of claims 1 to 13, d a d u r c h e k e n n n z e i c h n e t that the actual rotation (V _{| ST} ) is adjusted to the target rotation (V _SO LL) by twisting the inner conductor (2) at at least one of the cable ends (3, 4), and the twisting is fixed by inserting the inner conductor ends (2.3 ) in receiving contact parts carrier (11) of an electrical connector (20) to be mounted on the associated cable end (3, 4) on a cable jacket (5) of the cable (1) is secured against rotation. 15. The method according to claim 14, d a d u r c h e k e n n n z e i c h n e t that the contact part carrier (11) is secured against rotation by pressing the contact part carrier (11) onto the corresponding cable end (3, 4) and / or by mounting a shielding sleeve (17) on the contact part carrier (11) so that it cannot rotate and on the corresponding cable end ( 3, 4) is pressed. 16. The method according to claim 14 or 15, d a d u r c h e k e n n n z e i c h n e t that the inner conductors (2) are twisted at at least one of the cable ends (3, 4) by a) the cable end (3, 4) is rotated; b) the contact part carrier (11) is rotated together with the inner conductor end (2.3) received in the contact part carrier (11); and or c) the shielding sleeve (17) is mounted on the contact part carrier (11) so that it cannot rotate and is rotated together with the contact part carrier (11) and the inner conductor ends (2.3) received in the contact part carrier (11). 17. The method according to any one of claims 1 to 16, d a d u r c h e k e n n n z e i c h n e t that first the first cable end (3) is assembled with a first connector (20) and then the second cable end (4) with a second connector (20). 18. The method according to any one of claims 1 to 17, d a d u r c h e k e n n n z e i c h n e t that the control unit (10) controls an actuator device (13) in order to effect the previously determined twist. 19. Device (30) for assembling an electrical cable (1), having a control unit (10) which is set up to an actual rotation (V _{| ST} ) and a target rotation (V _SO LL) between inner conductor ends (2.3) of inside conductors (2) extending through the cable (1) at the respective cable ends (3, 4), and wherein the control unit (10) is set up to adjust the actual rotation (V | _S T) to the Nominal rotation (V _S OLL) to calculate the axial length shortening (AL) of the total length (L) of the cable (1), the control unit (10) being further set up to remove a predetermined stripping length (L _Ä ) along which a stripping device ( 22) the inner conductor (2), starting from its inner conductor ends (2.3), is able to enlarge at least one of the cable ends (3, 4) taking into account the calculated length reduction (AL) in order to at least partially compensate for the length reduction (AL). 20. Computer program product with program code means to carry out a method according to one of claims 1 to 18 when the program is executed on a control unit (10) of a device (30) for assembling an electrical cable (1). 21. System (31) for assembling an electrical cable (1), comprising a) a device (30) for assembling an electrical cable (1) according to claim 19; and b) at least one module (32, 33, 34) that is independent of the device (30) for assembling the electrical cable (1). 22. System (31) according to claim 21, d a d u r c h e k e n n n z e i c h n e t that at least one of the independent modules (32, 33, 34) as a module for aligning and orienting the electrical cable (1) and / or as a module for stripping a section of a cable component (5, 6, 7) of the cable (1) and / or as a module for removing a cable film from a front end of the cable (1) and / or as a module for processing a cable shielding braid (6) of the cable (1) and / or as a module for mounting a support sleeve on the front end of the cable (1) and / or as a module for mounting a housing component of an electrical connector (20), in particular a contact part carrier (11), is ausgebil det.