EP0353810A2 - Process for producing contact pieces from strip material, contact pieces produced according to the process and strip material for producing contact pieces - Google Patents

Abstract

Process for producing contact pieces from strip material to be pressed onto the insulation-free end of an electric conductor, and contact pieces produced according to the process and punching strips for the production thereof. …<??>A number of flat blanks (30) are stamped out of a punching strip (20), which blanks have a first part (31) and a second part (32) and which, after the separation from the punching strip (20), are pressed by means of at least one die to form two different parts of a contact sleeve or a cable lug, the first parts being provided with an insulation, in that they are provided either with an insulation strip (34) which is pushed over one or both side edges (31A, 31B) of each first part (31), or in that the first parts (31) are enclosed in a bag made of insulation material, or are covered with a layer of insulation lacquer, or are provided with a powder burn-in layer. …<IMAGE>…

Description

The invention relates to a method for producing contact elements, such as cable lugs and contact sleeves, made from tape goods, which are intended to be pressed onto the stripped end of an electrical conductor, and to contact elements produced by the method.

Cable lugs are understood to mean contact elements which have a connection part in the form of a hollow cylinder and a contact part (which occurs in many different forms) and which is made of metal and which is the same as the connection part. A stripped conductor end is inserted into the connection part - but not into the contact part - and the connection part, which can be provided with an insulation sleeve if necessary, is crimped around this conductor end.

Contact sleeves are understood to mean contact organs in which the stripped conductor end is inserted directly into the contact part (sleeve part) and pressed therein, with any connection part consisting of non-insulated metal like the contact part ("insulating surround" according to DIN (draft) 46 228 "wire end sleeves) ", Part 2) is crimped around the end of the insulated part of the conductor. As "wire end sleeves with plastic collar" wire end sleeves are known in which an exclusively made of insulating material, eg. B. polypropylene, existing injection ter collar part ("insertion funnel") is connected. To attach a contact sleeve to the end of an electrical conductor, the relevant, generally multi-wire conductor is stripped along a distance corresponding to the length of the sleeve part and inserted through the insertion funnel into the sleeve part. In these sleeves, only the metallic sleeve part is then pressed in a crimping tool or in a crimping apparatus, and if necessary, a selected non-circular, e.g. B. can get trapezoidal, cross-sectional profile.

The collar part only loosely surrounds the end of the conductor insulation and cannot be crimped because it is not made of metal. For this reason it also takes up considerably more space than the conductor and the sleeve alone, so that conductors provided with such sleeves e.g. cannot be connected to a contact strip or the like which has tightly adjacent connection slots.

Cable lugs and contact sleeves are manufactured not only as individual pieces, but also in tape form and used in such a way that they are only removed from a pre-punched metal tape, called "tape goods", when they are attached to the conductor end in order to be pressed immediately (by roll crimping).

Contact elements in the form of a tape are more advantageous both in terms of manufacture and in terms of attachment to the conductor than piece-wise contacts, in the latter case, among other things, because they do not force the conductor in question to be inserted in its longitudinal direction, but also to insert the conductor into it open crimp claws - what the shape of their The connection part in the uncrimped state is - enable at right angles to the longitudinal direction of the conductor.

Attaching an insulating sleeve to piece of cable lugs as well as attaching the plastic collar to piece-end ferrules requires a separate operation and is therefore relatively slow and expensive.

Up to now, contact elements made from tape goods with an insulated connection part have not been available, which is to be felt all the more as a disadvantage because, in addition to their primary function in the piece-by-piece manufactured contact elements, such an insulation also has an important identification function by its different colors (such as red, yellow, green) serve as code designation for the area of application of the relevant contact element (ie the appropriate conductor cross-section).

The present invention has for its object to provide a method for producing such contact elements from tape goods, which are provided on the connection part with insulation in a selected color, in particular for the purpose of coding, which allow a close connection along a limited distance, the end part of the conductor insulation firmly grasp and embrace, and in which the conductor can also be inserted transversely to its longitudinal direction. The invention also relates to contact members produced by the method and to tape goods for their manufacture.

Thanks to the invention, the us is fully automatic for the first time Processable ferrule tape goods are available, from which contact elements can be produced with a color-coded, touch-proof insulation enclosure. Contact organs are obtained in which the insulation enclosure (ie the connection part) is itself insulated, thus representing both protection against contact and, thanks to its color design, conductor cross-section detection according to the color scheme (e.g. according to DIN (draft) 46228, part 4) which is introduced in wire end sleeves in tubular form with an insulating collar. The method according to the invention enables the insulation to be applied fully automatically to the stamping strip at the highest speed, and preferably directly in connection with the stamping process in which the metallic strip material is produced.

The wire end sleeves according to the invention also have the advantage of increased tensile strength compared to the known wire end sleeves with insulation collars, because in addition to the contact part, the insulated connection part can also be crimped around the insulated part of the conductor end, since it has a metallic "body". This also holds the conductor insulation so that it cannot be pushed back from the end of the conductor.

The invention consequently relates to a method of the type specified in the preamble of claim 1, and to contact members and punching tapes of the type specified in the preamble of claims 18 and 19, and has the features stated in the characterizing parts of these claims on. Advantageous further developments are included in the connected subclaims.

• Fig. 1 in Perspektivansicht eine vorbekannte Aderendhülse mit Isolationskragen,
• Fig. 2 in Vorderansicht in Richtung des Pfeiles II in Fig.1 dieselbe Kontakthülse nach dem Verpressen,
• Fig. 3 im Aufriss ein Stanzband ("Bandware") zum Herstel­len einer erfindungsgemässen Kontakthülse in einer ersten Aus­führungsform,
• Fig. 4 einen Schnitt entlang der Ebene IV-IV in Fig. 3 in einer späteren Arbeitsphase,
• Fig. 5 im Aufriss ein Stanzband ("Bandware") zum Herstel­len einer erfindungsgemässen Kontakthülse in einer zweiten Aus­führungsform,
• Fig. 6 in einer der Fig. 1 entsprechenden Perspektivansicht einen vorgeformten erfindungsgemässen Rohling für eine Kontakt­hülse in einer ersten Ausführungsform,
• Fig. 7 den Rohling gemäss Fig. 6 in einer Hinteransicht in Richtung des Pfeiles VII in Fig. 6,
• Fig. 8 in einer Vorderansicht in Richtung des Pfeiles VIII in Fig. 6 die aus dem Rohling gemäss Fig. 6 und 7 hergestellte Kontakthülse nach dem Verpressen,
• Fig. 9 den Rohling gemäss Fig. 6 in der gleichen Hinteran­sicht wie in Fig. 7 nach dem Verpressen,
• Fig. 10 in Seitenansicht eine erfindungsgemässe Kontakthülse in einer zweiten Ausführungsform,
• Fig. 11 die Kontakthülse gemäss Fig. 10 in einer Vorderan­sicht in Richtung des Pfeiles XI in Fig. 10,
• Fig. 12 die Kontakthülse gemäss Fig. 10 in einer Hinteran­sicht in Richtung des Pfeiles XII in Fig. 10,
• Fig. 13 im Aufriss ein erfindungsgemässes Stanzband in einer dritten Ausführungsform (für die Herstellung von Kabelschuhen),
• Fig. 14 im Aufriss ein erfindungsgemässes Stanzband in einer vierten Ausführungsform, ebenfalls für die Herstellung von Ka­belschuhen,
• Fig. 15 einen Schnitt enlang der Ebene XV-XV in Fig. 14,
• Fig. 16 und 17 zwei Pressgesänke zum Anbringen der erfin­dungsgemässen Kontaktorgane, und
• Fig. 18 und 19 in Draufsicht und im Schnitt entlang der Ebene XIX-XIX eine alternative Ausführung der Isolation.

The invention will now be explained in more detail with reference to exemplary embodiments according to the accompanying drawings. Here shows

• 1 is a perspective view of a known ferrule with insulation collar,
• 2 in front view in the direction of arrow II in Fig.1 the same contact sleeve after pressing,
• 3 shows a punched tape ("tape goods") for producing a contact sleeve according to the invention in a first embodiment,
• 4 shows a section along the plane IV-IV in FIG. 3 in a later working phase,
• 5 shows, in elevation, a punched tape (“tape goods”) for producing a contact sleeve according to the invention in a second embodiment,
• 6 in a perspective view corresponding to FIG. 1, a preformed blank according to the invention for a contact sleeve in a first embodiment,
• 7 shows the blank according to FIG. 6 in a rear view in the direction of arrow VII in FIG. 6,
• 8 in a front view in the direction of arrow VIII in FIG. 6, the contact sleeve produced from the blank according to FIGS. 6 and 7 after pressing,
• 9 the blank according to FIG. 6 in the same rear view as in FIG. 7 after pressing,
• 10 is a side view of a contact sleeve according to the invention in a second embodiment,
• 11 shows the contact sleeve according to FIG. 10 in a front view in the direction of arrow XI in FIG. 10,
• 12 shows the contact sleeve according to FIG. 10 in a rear view in the direction of arrow XII in FIG. 10,
• 13 shows in elevation a punching tape according to the invention in a third embodiment (for the production of cable lugs),
• 14 shows a punching tape according to the invention in a fourth embodiment, likewise for the production of cable lugs,
• 15 shows a section along the plane XV-XV in FIG. 14,
• 16 and 17 two press dies for attaching the contact members according to the invention, and
• 18 and 19 in plan view and in section along the plane XIX-XIX an alternative embodiment of the insulation.

1 and 2, which show a conventional, end-to-end ferrule with a plastic collar, and which consequently do not relate directly to the present invention, such a contact sleeve 10 has a sleeve part 11 in the form of a hollow cylinder made of metal, at the end of which 11 'A plastic collar or insertion funnel 12 made of insulating material is connected. The relevant conductor L (Fig. 2), stripped at one end in the length of the hollow cylinder 11, is inserted in the direction of arrow A, ie axially in its longitudinal direction, into the contact sleeve, and then pressed together with the sleeve part, for example the out of round shown in Fig. 2 Cross-sectional shape can come about. The plastic collar 12, the color of which has been chosen as the code designation, loosely encloses a part of the conductor end that has not been stripped.

According to the invention, individual contact sleeves with insulating insertion funnels are now not produced, but punched strips ("strip goods") 20 or 120 (for example 0.5 mm thick brass strips) according to FIGS. 3 or 5 are made from sheet metal of selected nature and thickness with a selected number of contact member blanks 30 or 130 connected to one another by connecting webs 23 or 123, each blank 30, 130 being essentially flat and having a first part 31, 131 and a second part 32, 132. The first part 31, 131 has essentially the shape of a rectangle and is at least in the connection area and the second part 32, 132 wider than this, e.g. due to a constriction 33˝ (FIG. 14), or such constrictions 33 and 133 on both sides. In the latter case, the two parts 31, 32 and 131, 132 can have a common axis of symmetry D.

The band 20, 120 thus essentially contains a first region I with all the first parts 31, 131, and a second region II with all the second parts 32, 132.

The first parts 31, 131 each have two side edges 31A, 31B or 131A, 131B, and a terminating edge 31C or 131C connecting these side edges.

The second parts 32, 132 also essentially have in the case of blanks intended for contact sleeves (FIGS. 3 and 5) rectangular shape, and are terminated by a leading edge 32A, 132A.

3 and 5, the second parts 32, 132 are not only in the connection area, but also generally narrower than the first parts 31, 131. The lengths L, L '(dimensions in the horizontal direction in FIGS. 3 and 5) of first and second parts 31, 131 and 32, 132 correspond to the foreseen extent (possibly, especially in the case of the first parts, with addition for the desired overlap, as with B in FIGS. 9 and 12) of the future collar or sleeve parts. The constrictions 33 and 133 enable the first and second parts to be rolled up or pressed together to different cross-sectional dimensions and / or cross-sectional profiles, or (in the case of cable lugs - FIGS. 13, 14) only the first parts are rolled up.

3 and 5 it can be seen that the connecting webs 23 and 123 also at another point, e.g. can be arranged in half the length of the second parts (as shown in FIG. 14), or at the connection to the terminating edge 31C, 131C (in the region of the axis D, or outside this region). An edge or carrier part 120 '(Fig. 5) of the band 120, from which the connecting webs 123 extend, has manipulation openings 120˝, which serve to advance the band 120 in the crimping device.

On one side or surface of zone I of the band 20 or 120, namely that which is to form the outside of the finished contact element (the lower surface in FIGS. 3 and 5), a strip 34 or 134 is a suitable one Isolation measure terials of selected thickness and color attached (eg glued, welded, etc.), for example a 0.05 to 0.1 mm thick polyester film sold under the trade name "Mylar". Here, the mutual removal of two adjacent blanks 30 or 130 in the band 20 or 120 by dimensioning the connecting webs 23 or positioning the connecting webs 123 is preferably selected such that between the first parts 31 and 131 of the adjacent blanks 30 and 130 mentioned a free path S of preselected length comes about, which is flanked by the side edges 31A, 31B, 131A, 131B of adjacent blanks 30, 130, or their first parts 31, 131, and is only bridged by the insulation strip 34, 134.

The purpose of this arrangement is to enable the insulation strip 34 or 134 (to be described later) to be bent or turned over around the side edge 31A, 131A etc. of one or both of the first parts 31 or 131 concerned, as in FIG. 15 at 34˝A (everting one side edge) and in Fig. 4 and 7 at 34A (everting on both side edges) in order to isolate this side edge as well.

The insulation strip 34, 134 has a width W (FIG. 5) which is somewhat larger than the height H of the first parts 31, 131, but smaller than the double of this height H. The insulation strip is then attached in such a way that it extends beyond the end edges 31C, 131C with a distance T in order to ensure reliable insulation of these edges in the end product, and, if appropriate, also with a distance T 'opposite projecting edges 31D, 131D (so that it extends approximately to the constrictions 33, 33 ′, 133, 133˝).

The punched tape 20 or 120 on the one hand, and the insulating strip 34 or 134 on the other hand are produced in a manner known per se, and the insulating strip 34, 134 is, as already mentioned, attached to that side or surface of the punched tape 20, 120 which will form the outer surface of the future contact organ.

Alternative methods for applying insulation to the first part of a contact element according to the invention will be discussed later, i.a. in connection with FIGS. 18 and 19.

The individual blanks 30 and 130 can preferably be partially preformed, i.e. about the shape shown in Fig. 6 are pre-bent.

In principle, you can choose whether the blanks provided with the insulation strip (possibly the preformed blanks) should be separated from one another and sold individually, or whether, preferably, they are supplied as strips in coherent, longer or less long strips, and only when Attachment to a conductor end to be separated from each other.

During the separating process, the connecting webs 23, 123 are severed, in the embodiment according to FIG. 3 in each case at two points 23A (which completely removes the webs), and in the embodiment according to FIG. 5 at a single point 123A (so that they remain at the edge or support part 120 ', which however forms waste as a whole). The separation points 23A, 123A can preferably already at the arrival tapes 20, 120 are prepared (pre-punched). Furthermore, the insulation strips 34, 134 are cut at a selected point 34B, 134B or 34˝B (FIG. 14) between two adjacent blanks 30, 130, and then, as already mentioned, around the one side edge 31˝A (FIG. 14 ) or around both side edges 31A, 31B or 131A, 131B (if the dividing line is laid in the central region of the distance S) of a first part 31, 131 turned over onto the reverse side of the first part, and preferably also glued to this reverse side etc.

The conductor L, provided with an insulation layer M (FIG. 9), is stripped after stripping an end part in a crimp arrangement (crimping pliers or crimping apparatus) with appropriately shaped sockets for the first part 31, 131 (in the case of contact sleeves also for the second part 32, 132 ) in any direction, ie in particular also at right angles to its longitudinal direction, in the (preferably pre-bent) blank 30, 130. When the crimp arrangement is actuated, the first part 31, 131 is then pressed in a generally cylindrical manner (FIG. 9) around the stripped end (in the case of cable lugs) or (in the case of contact sleeves) around the non-stripped part of the conductor L which adjoins the stripped end, preferably with a certain overlap (B, Fig. 9) of the side edge parts, with contact sleeves at the same time the second part 32, 132 with the inserted stripped conductor end is pressed and deformed in a die to the desired cross-section (Fig. 8). The section of the insulation strip 34, 134 (section T in FIGS. 3 and 5) projecting beyond the first part 31, 131 ensures a seamless connection of the cones clock insulation to the conductor insulation.

If the insulation strip 34, 134 has only been turned inside out on one of the side edges 31˝A (FIG. 15), this side edge has outside after the pressing, i.e. to lie above the other, non-stripped side edge 31˝B.

6 and 7 show a blank 30 taken from the strip 20 according to FIG. 3 after the pre-deformation, and in FIG. 8 and 9 its first part 31 and second part 32 after the final pressing, respectively.

10 to 12 is a contact sleeve 100 formed from a blank 130 according to FIG. 5 after the pressing, i.e. after attachment to a conductor L, shown, the contours of the preformed blank (before separation from the connecting web 123) are indicated by dash-dotted lines. In the second part 132, which is designed to form the sleeve part, a number of notches or beads 132 'have been pressed in to reinforce the mechanical connection, either when deforming into the state shown in FIG. 6, or during the final crimping (e.g. in a second parallel die). In the latter case, the advantage is achieved that the delivery and storage of the tape goods is possible in a space-saving flat form.

A contact sleeve 100 according to the invention thus consists of a metal body which has been formed in a manner known per se by rolling together two different, but contiguous parts of an originally flat blank 130, the collar part of the sleeve resulting from the first part 131 of the blank 130, which is around an insulated part of the conductor end is to be pressed, at least externally provided with an insulation coating.

In contrast to conventional piece-by-piece contact sleeves (FIG. 1), the advantage of a reinforced mechanical connection of the contact sleeve to the conductor, and in particular to its insulation sheath M, is achieved in addition to the more rational method of manufacture. In contrast to conventional contact sleeves made from tape goods, the collar part is also provided with insulation, in a chosen color, which also enables coding. The protruding part of the collar insulation (section T in FIG. 5) nestles against the insulation sheath M of the conductor L.

The punching tape 20 'according to FIG. 13 differs from the punching tape 20 according to FIG. 3 only in that the blanks 30' (with unchanged first parts 31 '), the second parts 32' are designed instead of sleeve parts to fork-shaped cable lug contact parts are that are not deformed further, so that the end product does not form a contact sleeve, but a cable lug. Otherwise, the method differs from that described in connection with FIG. 3 only in that the contact parts 32 'are not further pressed, and that the stripped conductor end is inserted in a manner known per se only into the first part 31' which now forms a connecting part becomes. The insulation strip 34 'with separation points 34'A, and the connecting webs 23' with separation points 23'A correspond to the embodiment according to FIG. 3rd

There are also cable lugs, e.g. so-called pin cable lugs hey, where the contact part is not flat, but eg rolled up; Such cable lugs can obviously be produced according to the invention in the same way as a sleeve part in a contact sleeve (preforming and / or pressing).

14 and 15, a stamping tape 20˝ is shown, which contains the tape 20 'blanks 30˝ for the manufacture of cable lugs. The connecting webs 23˝ are arranged approximately halfway up the second parts 32˝, the first parts 31˝ are separated by a single constriction 33 (from the second parts 32˝ (so that the blank 30˝ is not axisymmetric), and the insulation strip 34˝ is severed at 34˝B close to one side edge 31˝B in order to be turned inside out along a single side edge 31˝A of the adjacent blank 31˝ (34˝A in FIG. 15).

In Fig. 16, the deformation of a second part 32 according to Fig. 6 in the die of a crimp arrangement to a contact part is e.g. 8 or 11 (depending on the shape of the die) shown. The press die has two halves C and D which can be brought together in the direction of arrow P. 17 shows the deformation of a first part 31, 34 according to FIG. 6 into a cylindrical, insulated connecting part, e.g. 9 in a press die of a crimp arrangement, which has two halves CC, DD which can be brought together in the direction of arrow P.

18 and 19 show an alternative method for applying the insulation to the first parts of the blanks poses. At each first part such as 131 ', a bag 35' made of insulation material is drawn on and fastened by welding or gluing along at least one of its edges, for example edge E.

From Fig. 18 it can be seen that a rectangle of the insulation material in question can be assumed, which has slightly more than twice the area of the first part to be clad 131 ', and along a line A around the end edge 131'C of the first part 31 'is turned inside out to be welded or glued along its remaining edges E, E' (with the exception of the area V on the connecting web). Of course, an edge E other than the one shown can also be selected for turning inside out, e.g. one of the side edges.

However, it can preferably be done in such a way that a strip 234 of a suitable insulation material is in turn applied to one of the two surfaces of the region I of the punched tape which comprises the first parts, but which, in contrast to, for example, FIG is more than twice the height H of the named area I. This strip 234 is then folded around the end edge 131'C of the first part 131 ', or around the end edge of the first region I, and is welded or glued to its previously created part along its edge E (outside the sections V). By means of separating cuts 234 'and by welding or gluing along the edges E, E', the individual insulation bags are then produced, analogously to the method described earlier.

For even more secure fastening of the insulation bag, at least one opening 131'a can be arranged in the first part 131 ', through which the two walls 25a, 35b of the bag 35' are additionally welded or glued to one another.

A third alternative for attaching insulation to the first part of a contact element according to the invention is that on at least one side or surface (that which is to form the outer surface of the contact element) of the first parts 31, 31 ', 31-131 Area I of the punched tape, a layer of insulating varnish is applied, preferably in such a way that this area is immersed in a bath with insulating varnish or sprayed with insulating varnish.

Finally, a further alternative is to provide the said area on the at least one side or surface with an insulating layer by means of a powder-baked coating.

Claims (20)

1. A method of manufacturing for pressing on stripped ends of electrical conductors (L) certain contact members (100) with a connecting part and a contact part, such as cable lugs and contact sleeves (100), from blanks (30, 30 ', 30˝, 130) an essentially quadrangular first part (31, 31 ′, 31˝, 131) which can be designed to form the connection part of the contact element (100) and is delimited by two side edges (31A, 31B, 131A, 131B) and an end edge (31C, 131C), as well as a second part (32, 32 ′, 32˝, 132) that can be designed to form the contact part and that is terminated by an end edge (32A, 132A), a large number of these blanks (30, 130) using connecting webs (23, 23 ′, 23˝ 123) to form a punched strip (20, 20 ', 20˝ 120) made of metal, which has a front side corresponding to the outside of the contact elements, and a flip side, and one of the above-mentioned first parts (31, 31', 31˝ , 131) comprehensive first area (I), and a contains all said second parts (32, 32 ′, 32˝ 132) comprising second region (II), characterized in that on the first area and at least on its front side (I) before the individual blanks (30, 30 ′) are separated , 30˝ 130) an insulation layer is applied such that it covers the entire first part (31, 31 ′, 31˝, 131) including the terminating edge (31C, 131C) and at least one of the side edges (31A, 31B, 131A, 131B) covered. 2. The method according to claim 1, characterized in that the blanks (30, 130) are arranged in the punching strip (20, 20 ′ 20 ′, 120) with mutual distances between their first parts (31, 31 ′, 31˝ 131), and that at the front of the first area ( I) an insulation strip (34, 34 '34˝, 134) is attached, the width (W) greater than the height (H) of the first parts (31, 131), but smaller than the double of these heights, so that between two adjacent first parts (31, 31 ', 31˝ 131) a free path (S) bridged only by this insulation strip (34, 34', 34˝ 134), and that the insulation strip (34, 34 ', 34 ˝ 134) at a selected point (34B, 34′B, 34˝, 134B) within this free path (S), and by at least one of the two side edges (31A, 31B, 31′A) flanking the free paths (S) 31′B, 31˝A, 31˝B, 131A, 131B) of said first parts (31, 31 ′, 31˝, 131) is bent over on their flip side, so that the side edge in question is also isolated becomes. 3. The method according to claim 2, characterized in that the insulation strip (34˝) adjacent one side edge (31b) is severed close a first portion (31˝) and to the side edge (31a) of an adjacent first part (31 ˝) is turned inside out. 4. The method according to claim 2, characterized in that the insulation strip (34, 134) cuts through in the center region of the free path (S), and adjacent to both of these free path (S) flanking side edges (31A, 31B, 131A, 131B) adjacent first Parts (31, 131) is turned inside out. 5. The method according to claim 1, characterized in that the blanks (30, 130) in the punching tape (20, 20 ', 20' 120), with mutual distances between their first parts (31, 31 ', 31˝, 131), and with connecting webs located in the second area (II) (23, 123) are arranged, and that a bag (35 ') made of insulation material is pulled onto each first part (31, 31', 31˝, 131) so that it completely encloses this part. 6. The method according to claim 5, characterized in that the bag (35 ') is produced in such a way that a rectangular insulation material (35) which is slightly larger than twice the area of the relevant first part (131') is assumed, that this rectangle is turned inside out along an edge of the first part (31 '), and the two thus created bag walls (35a, 35b) are then welded or glued together along at least one of their remaining edges (E, E'). 7. The method according to claim 5, characterized in that the bag (35 ') is produced in such a way that on one of the surfaces of the first region (I) of the punched tape (20, 20', 20˝, 120) an insulation strip (34, 34 ', 34˝, 134) is attached, whose width (W') is slightly greater than twice the height (H) of the first parts (31, 31 ', 31˝, 131) that this strip along the end edge (131C ) of the first area (I), and divided into individual bags by cutting, each of which is welded or glued along at least one of its remaining edges. 8. The method according to any one of claims 5 to 7, because characterized in that in the first part (131 ′) at least one opening (131′a) is arranged, through which the two walls (35a, 35b) of the bag (35 ′) are additionally welded or glued to one another. 9. The method according to claim 1, characterized in that the first region (I) is provided at least on the front with a layer of insulating varnish, for example by spraying or immersing in a bath with insulating varnish. 10. The method according to claim 1, characterized in that the first region (I) is provided at least on the front by means of a powder-baked coating with an insulation layer. 11. The method according to one or more of the preceding claims, characterized in that in the punching tape (20, 120) separation points (23A, 23'A, 23˝A, 123A) for the connecting webs (23, 23 ', 23˝, 123) be pre-punched. 12. The method according to one or more of the preceding claims, characterized in that the connecting webs (23, 23˝) are arranged in the region between the second parts (32, 32˝) and each cut at two points (23A, 23˝A) will. 13. The method according to one or more of claims 1 to 11, characterized in that the connecting webs (123) are connected to a terminating edge (132A) of the blanks (130) and are severed at a single point (123A). 14. The method according to one or more of the preceding Claims, characterized in that at least the first parts (31, 31 ', 31˝, 131) of the blanks are pre-bent onto a conductor end before pressing. 15. The method according to one or more of the preceding claims, characterized in that the second parts (32, 32 ', 132) by constrictions on both sides (33, 33', 133) from the first parts (31, 31 ', 131) are and the first parts (31, 31 ', 131) are arranged to be crimped to an insulated conductor end with force-enclosing connection part of a contact sleeve (100). 16. The method according to claim 15, characterized in that the second part (32, 132) of the blanks, after inserting a conductor, is crimped into a wire end sleeve in a die. 17. The method according to one or more of claims 1 to 14, characterized in that the second part (32 ', 32˝) of the blanks is designed as the contact part of a cable lug. 18. A contact body (100) having a metal body and an insulating element and produced by the method according to one of the preceding claims, for pressing onto the stripped end of a conductor (L), characterized in that the metal body is formed by a deformed, originally flat blank (30 , 30 ', 30˝, 130), which has been separated from a punched strip (20, 20', 20˝, 120) having a plurality of similar blanks, and which has an originally flat and essentially rectangular first part (31, 31 ′, 31˝, 131), and a second part (32, 32 ', 32˝, 132), the first part being provided with an insulating layer (34, 43', 34˝, 134; 35 ') and when pressed on of the contact member has been rolled onto the conductor end by roll crimping to form a shape that firmly encompasses the conductor end. 19. Stamping tape (20, 120) made of metal, including a plurality of blanks (30, 30 ', 30˝, 130) for producing a connecting part and a contact part having contact members such as cable lugs and contact sleeves (100), the blanks one in essentially square, delimited by a terminating edge (31C, 131C) and two side edges (31A, 31B, 131A, 131B), the first part (31, 31 ′, 31˝, 131) that can be designed for the connection part, and a second part that can be designed for the contact part Have part (32, 32 ', 32˝, 132), and wherein the punching tape (20, 120) has a front corresponding to the outside of the contact members and a first all of said first parts (31, 31', 31˝, 131) Area (I), as well as a second area (II) comprising all said second part (32, 32 ′, 32˝, 132), characterized in that it is in the first area (I), and at least on its front, with a Isolation in the form of a layer or he is provided with a coating which also covers the end edge (31C) and at least one of the two side edges (31A, 31B, 131A, 131B) of each first part (31, 31 ', 31˝, 131) in the finished contact member. 20. Stamping tape according to claim 19, characterized ner that the second parts (32 ', 32˝) are arranged after crimping contact parts, and the first parts (31', 31˝) form isolated connecting parts of wire end ferrules.

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