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EP1383211A1 - Method for crimping a contact to strands of a cable - Google Patents

Method for crimping a contact to strands of a cable Download PDF

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Publication number
EP1383211A1
EP1383211A1 EP03102082A EP03102082A EP1383211A1 EP 1383211 A1 EP1383211 A1 EP 1383211A1 EP 03102082 A EP03102082 A EP 03102082A EP 03102082 A EP03102082 A EP 03102082A EP 1383211 A1 EP1383211 A1 EP 1383211A1
Authority
EP
European Patent Office
Prior art keywords
jaw
cable
contact
crimping
barrel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP03102082A
Other languages
German (de)
French (fr)
Other versions
EP1383211B1 (en
Inventor
Daniel Gloaguen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Souriau SAS
Original Assignee
Souriau SAS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Souriau SAS filed Critical Souriau SAS
Publication of EP1383211A1 publication Critical patent/EP1383211A1/en
Application granted granted Critical
Publication of EP1383211B1 publication Critical patent/EP1383211B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R43/00—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors
    • H01R43/04—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for forming connections by deformation, e.g. crimping tool
    • H01R43/042—Hand tools for crimping
    • H01R43/0425—Hand tools for crimping with mandrels actuated in axial direction to the wire
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/10—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation
    • H01R4/18—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping
    • H01R4/20—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation effected solely by twisting, wrapping, bending, crimping, or other permanent deformation by crimping using a crimping sleeve
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49174—Assembling terminal to elongated conductor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49174—Assembling terminal to elongated conductor
    • Y10T29/49181—Assembling terminal to elongated conductor by deforming
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49002—Electrical device making
    • Y10T29/49117—Conductor or circuit manufacturing
    • Y10T29/49174—Assembling terminal to elongated conductor
    • Y10T29/49181—Assembling terminal to elongated conductor by deforming
    • Y10T29/49185—Assembling terminal to elongated conductor by deforming of terminal
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble
    • Y10T29/5313—Means to assemble electrical device
    • Y10T29/532—Conductor
    • Y10T29/53209—Terminal or connector
    • Y10T29/53213—Assembled to wire-type conductor
    • Y10T29/53222—Means comprising hand-manipulatable implement
    • Y10T29/53226—Fastening by deformation

Definitions

  • the subject of the present invention is a method of crimping a contact on strands of a cable.
  • She especially finds her use in the field of electrical connections including those used in the aeronautical field, where the connection between a cable and a contact must be reliable regardless of external conditions to which it is subject.
  • These electrical connections are usually subject to large temperature and pressure variations amplitude due to boarding aircraft that can fly up to 10,000 meters of altitude. For example at the level of an airplane, the temperature can vary between -50 ° C, when in the air, and + 40 ° C when placed on the ground.
  • the object of the invention is to reduce the consequences of the phenomena of differential expansion induced by these temperature variations.
  • the invention provides a method for ensuring a good crimping of the contact on the cable even when these are made of materials distinct.
  • the invention proposes a solution to guarantee the crimping a contact forming a barrel inside which the cable is placed so that the barrel covers both bare strands of the cable and a non-stripped portion of this cable.
  • the soul of a cable is made from single strands that can be made of aluminum in particular for avionics, or copper or other applications. These strands are surrounded by an insulating sheath generally made of a material plastic. The constraint when the cable has strands is that these strands can roll over each other during a crimping operation. In addition, the retention of contact, even crimped, on these divided son is difficult.
  • the object of the invention is to overcome the disadvantages of mechanical strength and electrical continuity by proposing to connect the contact on both the soul namely the strands of the cable and both on the cable sheath.
  • the contact which is intended to receive in the barrel a stripped end of a cable has at a second end a connection termination.
  • the contact has a collar between this termination and the area with the barrel.
  • it is intended to hold the contact inside the crimping tool at the level of this collar.
  • the collar is presented inside a medium retention of the crimping tool.
  • connection strands inside the drum makes it possible to guarantee the connection strands inside the drum while guaranteeing their integrity and tightness of the connection thus made.
  • the tightness of a connection is fundamental to prevent corrosion phenomena.
  • the current connection by the crimping method according to the invention makes it possible to provide connections that withstand temperature variations and also corrosion by salty fogs.
  • the object of the invention is to crimp a contact into which is inserted a stripped end of a cable inside a barrel of this contact. Crimping at a first level, at a first zone of the barrel surrounding strands of the cable by a radial clamping movement of a jaw. And to crimp the barrel along its length along this end of the cable, the closed position of the tools ensuring the first crimping so as to guarantee the position of the strands of the cable by compared to the drum. So when the drum is crimped on its entire length by wire drawing it is ensured that the length of the crimped strands inside the barrel have a length in engagement corresponding to the expected dimensions. Indeed, cable strands are not repelled or broken inside the drum during of the drawing operation.
  • the subject of the invention is a crimping method which provides crimping a contact 1 around one end 2 of a cable 3 by means of a tool crimping 4.
  • the contact 1 is preferably made of a deformable material. he has a first front end 5 intended to cooperate with a complementary device. Moreover, it has a second end rear 6 forming a shaft 7 to receive the end 2 of the cable 3.
  • the first end 5 is a plug intended to cooperate with a socket of the complementary device.
  • the contact 1 has a main axis of elongation 8 according to which are presented for their respective connections on the one hand the first end of the contact 5 and on the other hand the shaft 7.
  • the shaft 7 has a opening 9 perpendicular to the axis 8 and opening into the barrel 7.
  • the inner cavity of the barrel 7 preferably has a frustoconical outer shape such that the diameter of the opening 9 is significantly greater than one diameter of the cable 3, while an inside diameter at the bottom of the cavity is of a diameter slightly less than the diameter of the cable 3 surrounded of its sheath 11, while being slightly greater than the diameter of the strands stripped 10 of the cable 3
  • the contact 1 is made of copper alloy.
  • the cable 3 has metal strands, in particular made of aluminum, and is surrounded by a sheath 11 preferably insulating and plastic.
  • the invention is particularly interesting for this type of connection.
  • the crimping tool 4 has a first jaw 12 and a second jaw 13. These two jaws 12 and 13 can open from to allow the introduction of the contact 1 along its axis 8 between parts of the two jaws 12 and 13 respectively. Preferably, jaws open and close orthogonally to the axis 8. When the contact 1 is correctly placed in the crimping means 4, the first jaw 12 is closed around a tubular portion 14 of the barrel 7.
  • the tubular portion 14 has a tubular outer periphery in the continuity of the frustoconical circumference of the shaft 7, in continuity with the end of smaller diameter of this frustoconical portion. This portion tubular surrounds more particularly the bottom of the drum cavity 7.
  • the second jaw 13 comes to close around the portion truncated barrel 7.
  • the second jaw 13 has chamfered edges of shapes substantially complementary to the shape frustoconical shaft 7.
  • the contact is retained in the crimping tool 4, but it is still free to be slightly moved between these two jaws.
  • Contact retention 1 in the first jaw 12 makes it easy to insert the end 2 of the cable 3 inside the drum 7.
  • the contact 1 preferably has a flange 15 to cooperate with flanges 16 of the first jaw 12.
  • the first jaw 12 has face-to-face flanges 16 'and 16 "between which the flange 15 is retained.
  • the cooperation between the edges chamfered and the frustoconical outer wall also limits the mobility of the contact 1 along the axis 8 inside the crimping tool 4.
  • a jaw such as 12 or 13 comprises respectively one or more movable parts to cooperate together. These parts can come closer and move away from each other to define a space with variable dimension between these two parts. On the other hand these two parts can be adjusted in position one vis-à-vis the other to be properly positioned either in an open position for receive a contact either in a retention position to hold the contact, either in a crimping position to compress walls of the contact on the cable 3. Generally these parts are symmetrical, some compared to others. They come closer and move away from each other according to an axis preferably perpendicular to the axis 8 of elongation of the contact 1. Regarding the second jaw 13, it is also endowed with a translation means for being moved longitudinally along the axis 8.
  • the portion is crimped first tubular 14 disposed between the moving parts of the first jaw 12 in a radial movement of the jaw with respect to the axis 8.
  • the parts of the jaw 12 come closer to each other to come to constrain the portion 14 around the end 17 of the strands stripped 10.
  • the parts constituting the jaw 12 are brought closer to one another according to radially directed forces. The forces are equivalent.
  • the first jaw 12 remains thus embedded in the portion 14, while the second jaw 13 is it moved axially along the axis 8 of way to come to bear against external perimeters 18 of the truncated portion of the barrel 7.
  • the axial displacement along the axis 8 of these two parts causes a progressive crushing of the walls 18.
  • a spacing of the parts 20, 21 is such that a distance between the flanges respectively 19 is slightly greater than the outer diameter of strands stripped 10 and successively of the sheath 11. This provides a crimp by drawing, where the rear shank 7, as shown in Figure 5, is crimped as the bare strands 10 and then on the sheath 11. gets a crimp that still gives a slight look frustoconical barrel 7.
  • the two jaws 12 and 13 are contiguous to each other.
  • the second jaw 13 is gradually moving away from the first jaw 12 to run along its entire length the barrel 7. This second jaw 13 is moved to a termination of the barrel 7, namely up to the opening 9 of the barrel 7.
  • the crimping performed by the first jaw 12 corresponds to a crimp in four or eight points.
  • the parts of the first jaw 12 may for example be two in number and For example, each of them has four pressure points to apply against the outer circumference of the portion 14. Alternatively, it may be plan to turn to present only two pressure points on each part of the jaw 12. In this case, to get the eight crimping points, it is possible to impose a rotation of approximately 45 ° contact 1, and to translate it slightly along the axis 8. In this variant, then one can get a disposition of these eight points of staggered crimping on the outer periphery of the cylindrical section 14. This particular position allows to provide a better resistance of the crimping vis-à-vis axial tensile forces.
  • the crimping means 4 has a trigger that allows to successively engage the first jaw 12 around contact 1 and directly enchaine this insertion of the first jaw 12 in the contact 1 by a displacement of the second jaw 13 along this contact 1 to ensure crimping full.
  • the second jaw 13 automatically returns next to the first jaw 12, and the respective parts of each of the jaws 12 and 13 open again to allow the end of the cable to come out provided with his contact 1 now crimped around.
  • the crimping tool can receive a new contact such as 1 crimp on a new end such as 2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)

Abstract

The end of the cable (2) is inserted into the contact (1) via an opening (9) in the end of the contact shank (7) until at least part of the exposed cable wires (10) are located inside a tubular part of the shank (14). A first jaw (12) in a crimping tool (4) is clamped around the shank so that the tubular part of the latter is crimped around the wires, then whilst keeping the first jaw clamped in this position, a second jaw (13) in the tool is moved over the length of the shank in order to crimp the rest onto the wires. The contact comprises a shank with a tubular part and a truncated cone-shaped part (8) forming an extension of the tubular part. The opening for inserting the end of the cable is provided in the truncated cone-shaped part.

Description

La présente invention a pour objet un procédé de sertissage d'un contact sur des brins d'un câble. Elle trouve plus particulièrement son utilisation dans le domaine des connexions électriques notamment celles utilisées dans le domaine aéronautique, où la connexion entre un câble et un contact doit être fiable quelles que soient les conditions extérieures auxquelles elle est soumise. Ces connexions électriques sont généralement soumises à des variations de températures et de pressions de grande amplitude du fait de l'embarquement à bord d'avions pouvant voler jusqu'à 10 000 mètres d'altitude. Par exemple au niveau d'un avion, la température peut varier entre -50°C, lorsqu'il est dans les airs, et +40°C lorsqu'il est posé au sol.The subject of the present invention is a method of crimping a contact on strands of a cable. She especially finds her use in the field of electrical connections including those used in the aeronautical field, where the connection between a cable and a contact must be reliable regardless of external conditions to which it is subject. These electrical connections are usually subject to large temperature and pressure variations amplitude due to boarding aircraft that can fly up to 10,000 meters of altitude. For example at the level of an airplane, the temperature can vary between -50 ° C, when in the air, and + 40 ° C when placed on the ground.

Ces variations sont de plus rapides et sont subies dans l'espace de quelques heures. Les câbles permettent de raccorder des systèmes électroniques entre eux ou de les relier à une alimentation électrique; il est donc primordial de garantir la sécurité de ces connexions. A cet effet l'invention a pour but de diminuer les conséquences des phénomènes de dilatation différentielle induit par ces variations de température. Pour ce faire, l'invention propose un procédé permettant de garantir un bon sertissage du contact sur le câble même lorsque ceux ci sont réalisés dans des matériaux distincts.These variations are faster and are experienced in the space of a few hours. Cables allow you to connect systems between them or to connect them to a power supply; he is It is therefore essential to guarantee the security of these connections. For this purpose the object of the invention is to reduce the consequences of the phenomena of differential expansion induced by these temperature variations. To do this, the invention provides a method for ensuring a good crimping of the contact on the cable even when these are made of materials distinct.

Par ailleurs, l'invention propose une solution pour garantir le sertissage d'un contact formant un fût à l'intérieur duquel est placé le câble de manière à ce que le fût recouvre à la fois des brins dénudés du câble et une portion non dénudé de ce câble. En général, l'âme d'un câble est réalisée à partir de brins unitaires pouvant être en aluminium notamment pour des applications avioniques, ou en cuivre ou autres. Ces brins sont entourés d'une gaine isolante généralement réalisée dans un matériau plastique. La contrainte lorsque le câble comporte des brins c'est que ces brins peuvent rouler les uns sur les autres lors d'une opération de sertissage. De plus, la rétention du contact, même serti, sur ces fils divisés est difficile. L'invention a pour objet de remédier aux inconvénients de tenue mécanique et de continuité électrique en proposant de raccorder le contact à la fois sur l'âme à savoir les brins du câble et à la fois sur la gaine du câble. Moreover, the invention proposes a solution to guarantee the crimping a contact forming a barrel inside which the cable is placed so that the barrel covers both bare strands of the cable and a non-stripped portion of this cable. In general, the soul of a cable is made from single strands that can be made of aluminum in particular for avionics, or copper or other applications. These strands are surrounded by an insulating sheath generally made of a material plastic. The constraint when the cable has strands is that these strands can roll over each other during a crimping operation. In addition, the retention of contact, even crimped, on these divided son is difficult. The object of the invention is to overcome the disadvantages of mechanical strength and electrical continuity by proposing to connect the contact on both the soul namely the strands of the cable and both on the cable sheath.

Dans l'état de la technique, on connaít de l'enseignement du document FR-A-2,710,788, un procédé de sertissage pour raccorder une extrémité dénudée d'un câble électrique dans un contact permettant de garantir l'étanchéité de la connexion. Pour utiliser le procédé, il est nécessaire que le contact présente un fût avec un pourtour extérieur tronconique, ce fût permettant de recevoir le câble. Ce contact est réalisé dans un matériau déformable et conducteur. Selon un procédé connu, on réalise un sertissage par tréfilage. Une extrémité du contact est retenue dans l'outil de sertissage, pendant que la mâchoire de l'outil de sertissage est déplacée le long du pourtour tronconique pour en rabattre les pans le long du câble et le long de l'extrémité dénudée.In the state of the art, the teaching of FR-A-2,710,788, a crimping method for connecting a bare end of an electrical cable in a contact allowing guarantee the tightness of the connection. To use the process, it is necessary that the contact has a shaft with an outer circumference frustoconical, this was to receive the cable. This contact is made in a deformable and conductive material. According to a known method, performs a crimping by drawing. One end of the contact is retained in the crimping tool, while the jaw of the crimping tool is moved along the frustoconical circumference to fold down the sides along the cable and along the bare end.

En général, le contact qui est destiné à recevoir dans le fût une extrémité dénudée d'un câble présente à une deuxième extrémité une terminaison de connexion. Le contact présente une collerette entre cette terminaison de connexion et la zone présentant le fût. Dans l'invention il est prévu de retenir le contact à l'intérieur de l'outil de sertissage au niveau de cette collerette. En effet, la collerette est présentée à l'intérieur d'un moyen de rétention de l'outil de sertissage. Ensuite, après avoir inséré l'extrémité du câble à sertir à l'intérieur du fût, on déplace la mâchoire depuis le moyen de rétention de la collerette en direction de l'ouverture du fût pour écraser les pans de ce fût sur le câble. Le déplacement de cette mâchoire exerce une pression radiale, et à la fois axiale sur les brins du câble à sertir. Avec un tel procédé, on risque de désengager des brins du fût, voire de les rompre à l'intérieur du fût, ce qui entraíne un défaut de connexion.In general, the contact which is intended to receive in the barrel a stripped end of a cable has at a second end a connection termination. The contact has a collar between this termination and the area with the barrel. In the invention it is intended to hold the contact inside the crimping tool at the level of this collar. Indeed, the collar is presented inside a medium retention of the crimping tool. Then, after inserting the end of cable crimp inside the barrel, we move the jaw from the means of retention of the collar towards the opening of the barrel to crush the parts of this shaft on the cable. The displacement of this jaw exerts a radial pressure, and both axially on the strands of the crimping cable. With such process, it is possible to disengage strands of the barrel, or even to break them at inside the barrel, which leads to a connection fault.

La solution proposée par l'invention permet de garantir la connexion des brins à l'intérieur du fût tout en garantissant leur intégrité et l'étanchéité de la connexion ainsi réalisée. L'étanchéité d'une connexion est fondamentale pour empêcher les phénomènes de corrosion. Notamment, la connexion actuelle par le procédé de sertissage selon l'invention permet de fournir des connexions qui résistent aux variations de température et également à la corrosion par des brouillards salins.The solution proposed by the invention makes it possible to guarantee the connection strands inside the drum while guaranteeing their integrity and tightness of the connection thus made. The tightness of a connection is fundamental to prevent corrosion phenomena. In particular, the current connection by the crimping method according to the invention makes it possible to provide connections that withstand temperature variations and also corrosion by salty fogs.

L'invention a pour objet de procéder au sertissage d'un contact dans lequel on insère une extrémité dénudée d'un câble à l'intérieur d'un fût de ce contact. On sertit à un premier niveau, au niveau d'une première zone du fût entourant des brins dénudés du câble par un mouvement de serrage radial d'une mâchoire. Et pour sertir le fût sur toute sa longueur le long de cette extrémité de câble, on maintient la position fermée des outils assurant le premier sertissage de manière à garantir la position des brins du câble par rapport au fût. Ainsi lorsque le fût est serti sur toute sa longueur par tréfilage on garantit que la longueur des brins sertis à l'intérieur du fût ont une longueur en prise correspondant bien aux dimensions prévues. En effet, les brins du câble ne sont pas repoussés ni rompus à l'intérieur du fût au cours de l'opération de tréfilage.The object of the invention is to crimp a contact into which is inserted a stripped end of a cable inside a barrel of this contact. Crimping at a first level, at a first zone of the barrel surrounding strands of the cable by a radial clamping movement of a jaw. And to crimp the barrel along its length along this end of the cable, the closed position of the tools ensuring the first crimping so as to guarantee the position of the strands of the cable by compared to the drum. So when the drum is crimped on its entire length by wire drawing it is ensured that the length of the crimped strands inside the barrel have a length in engagement corresponding to the expected dimensions. Indeed, cable strands are not repelled or broken inside the drum during of the drawing operation.

L'invention a pour objet un procédé de sertissage d'un contact sur une extrémité d'un câble, le contact comportant un fût avec une portion tubulaire se prolongeant par une portion tronconique pour déboucher par une ouverture et l'extrémité du câble comportant une partie de brins dénudés et une partie de brins entourés d'une gaine, caractérisé en ce que

  • on enfonce l'extrémité du câble à l'intérieur du fût par l'ouverture du fût jusqu'à ce qu'au moins une partie des brins dénudés soit présentée dans la portion tubulaire du fût 4, puis
  • on serre radialement une première mâchoire d'un moyen des sertissage sur le fût de manière à le sertir à un premier endroit de la portion tubulaire sur la partie de brins dénudés de l'extrémité du câble, et enfin
  • on maintient cette première mâchoire en position serrée, tout en déplaçant une deuxième mâchoire du moyen de sertissage le long du fût pour sertir le fût sur toute sa longueur autour de l'extrémité du câble.
The invention relates to a method of crimping a contact on one end of a cable, the contact comprising a barrel with a tubular portion extending by a frustoconical portion to open through an opening and the end of the cable having a part of stripped strands and a part of strands surrounded by a sheath, characterized in that
  • the end of the cable is pushed inside the barrel through the opening of the barrel until at least part of the stripped strands is presented in the tubular portion of the barrel 4, then
  • radially clamping a first jaw of crimping means on the barrel so as to crimp it at a first location of the tubular portion on the stripped portion of the end of the cable, and finally
  • this first jaw is held in a tight position, while moving a second jaw of the crimping means along the barrel to crimp the barrel along its length around the end of the cable.

L'invention sera mieux comprise à la lecture de la description qui suit et à l'examen des figures qui l'accompagnent. Celles-ci ne sont présentées qu'à titre indicatif et nullement limitatif de l'invention. Les figures montrent :

  • Figure 1 : Une vue en coupe longitudinale d'un contact retenu dans un outil de sertissage prévue pour recevoir un câble dénudé ;
  • Figure 2 : Une vue en coupe longitudinale d'un contact retenu dans un outil de sertissage au cours d'une première étape d'un procédé de sertissage selon l'invention ;
  • Figure 3 : Une vue en coupe longitudinale d'un contact retenu dans un outil de sertissage au cours d'une deuxième étape d'un procédé de sertissage selon l'invention ;
  • Figure 4 : Une vue en coupe longitudinale d'un contact retenu dans un outil de sertissage au cours d'une troisième étape d'un procédé de sertissage selon l'invention ;
  • Figure 5 : Une vue de profil d'un contact serti sur l'extrémité d'un câble selon un procédé selon l'invention.
The invention will be better understood on reading the description which follows and on examining the figures which accompany it. These are presented only as an indication and in no way limitative of the invention. The figures show:
  • Figure 1: A longitudinal sectional view of a contact retained in a crimping tool provided to receive a stripped cable;
  • Figure 2: A longitudinal sectional view of a contact retained in a crimping tool during a first step of a crimping process according to the invention;
  • Figure 3: A longitudinal sectional view of a contact retained in a crimping tool during a second step of a crimping process according to the invention;
  • Figure 4: A longitudinal sectional view of a contact retained in a crimping tool during a third step of a crimping process according to the invention;
  • Figure 5: A profile view of a crimped contact on the end of a cable according to a method according to the invention.

L'invention a pour objet un procédé de sertissage qui prévoit de sertir un contact 1 autour d'une extrémité 2 d'un câble 3 au moyen d'un outil de sertissage 4.The subject of the invention is a crimping method which provides crimping a contact 1 around one end 2 of a cable 3 by means of a tool crimping 4.

Le contact 1 est de préférence réalisé dans un matériau déformable. Il présente une première extrémité avant 5 destinée à coopérer avec un dispositif complémentaire. Par ailleurs il comporte une deuxième extrémité arrière 6 formant un fût 7 pour recevoir l'extrémité 2 du câble 3. Dans l'exemple présenté figure 1, la première extrémité 5 est une fiche mâle destinée à coopérer avec une prise femelle du dispositif complémentaire.The contact 1 is preferably made of a deformable material. he has a first front end 5 intended to cooperate with a complementary device. Moreover, it has a second end rear 6 forming a shaft 7 to receive the end 2 of the cable 3. In the example shown in FIG. 1, the first end 5 is a plug intended to cooperate with a socket of the complementary device.

Le contact 1 présente un axe d'allongement principal 8 selon lequel sont présentés en vue de leurs connexions respectives d'une part la première extrémité du contact 5 et d'autre part le fût 7. Le fût 7 présente une ouverture 9 perpendiculaire à l'axe 8 et débouchant à l'intérieur du fût 7. La cavité intérieure du fût 7 a de préférence une forme extérieure tronconique de telle sorte que le diamètre de l'ouverture 9 est nettement supérieur à un diamètre du câble 3, alors qu'un diamètre intérieur au niveau du fond de la cavité est d'un diamètre légèrement inférieur au diamètre du câble 3 entouré de sa gaine 11, tout en étant légèrement supérieur au diamètre des brins dénudés 10 du câble 3The contact 1 has a main axis of elongation 8 according to which are presented for their respective connections on the one hand the first end of the contact 5 and on the other hand the shaft 7. The shaft 7 has a opening 9 perpendicular to the axis 8 and opening into the barrel 7. The inner cavity of the barrel 7 preferably has a frustoconical outer shape such that the diameter of the opening 9 is significantly greater than one diameter of the cable 3, while an inside diameter at the bottom of the cavity is of a diameter slightly less than the diameter of the cable 3 surrounded of its sheath 11, while being slightly greater than the diameter of the strands stripped 10 of the cable 3

De préférence, le contact 1 est réalisé en alliage de cuivre. Le câble 3 comporte des brins métalliques, notamment réalisé en aluminium, et est entouré d'une gaine 11 de préférence isolante et plastique. L'invention est notamment intéressante pour ce type de connexion.Preferably, the contact 1 is made of copper alloy. The cable 3 has metal strands, in particular made of aluminum, and is surrounded by a sheath 11 preferably insulating and plastic. The invention is particularly interesting for this type of connection.

L'outil de sertissage 4 comporte une première mâchoire 12 et une deuxième mâchoire 13. Ces deux mâchoires 12 et 13 peuvent s'ouvrir de manière à autoriser l'introduction du contact 1 selon son axe 8 entre des parties des deux mâchoires 12 et 13 respectivement. De préférence, les mâchoires s'ouvrent et se referment orthogonalement à l'axe 8. Lorsque le contact 1 est correctement placé dans le moyen de sertissage 4, la première mâchoire 12 vient se refermer autour d'une portion tubulaire 14 du fût 7.The crimping tool 4 has a first jaw 12 and a second jaw 13. These two jaws 12 and 13 can open from to allow the introduction of the contact 1 along its axis 8 between parts of the two jaws 12 and 13 respectively. Preferably, jaws open and close orthogonally to the axis 8. When the contact 1 is correctly placed in the crimping means 4, the first jaw 12 is closed around a tubular portion 14 of the barrel 7.

La portion tubulaire 14 présente un pourtour extérieur tubulaire dans la continuité du pourtour tronconique du fût 7, dans la continuité avec l'extrémité de plus faible diamètre de cette portion tronconique. Cette portion tubulaire entoure plus particulièrement le fond de la cavité du fût 7.The tubular portion 14 has a tubular outer periphery in the continuity of the frustoconical circumference of the shaft 7, in continuity with the end of smaller diameter of this frustoconical portion. This portion tubular surrounds more particularly the bottom of the drum cavity 7.

La deuxième mâchoire 13 vient se refermer autour de la portion tronconique du fût 7. A cet effet, la deuxième mâchoire 13 présente des bords chanfreinés de formes sensiblement complémentaires à la forme tronconique du fût 7.The second jaw 13 comes to close around the portion truncated barrel 7. For this purpose, the second jaw 13 has chamfered edges of shapes substantially complementary to the shape frustoconical shaft 7.

Les mâchoires 12 et 13, après introduction du contact 1 dans l'outil de sertissage 4, se referment dans une première position de rétention, dans laquelle elles n'exercent pas de pression directement sur le contact. Le contact est retenu dans l'outil de sertissage 4, mais il est encore libre d'être légèrement déplacé entre ces deux mâchoires. La rétention du contact 1 dans la première mâchoire 12 permet d'insérer facilement l'extrémité 2 du câble 3 à l'intérieur du fût 7.The jaws 12 and 13, after introduction of the contact 1 in the tool of crimping 4, close again in a first position of retention, in which they do not exert pressure directly on the contact. The contact is retained in the crimping tool 4, but it is still free to be slightly moved between these two jaws. Contact retention 1 in the first jaw 12 makes it easy to insert the end 2 of the cable 3 inside the drum 7.

Comme présenté figure 2, lorsque dans une première étape du procédé de sertissage, on insère l'extrémité 2 du câble 3 à l'intérieur du fût 7, on enfonce cette extrémité 2 jusqu'à ce qu'au moins une partie des brins dénudés 10 soit présentée au niveau de la portion tubulaire 14. Le câble 3 est suffisamment dénudé de telle sorte que dans la position insérée dans le fût 7, une deuxième partie des brins 10 dénudés se situent également dans la portion tronconique du fût 7. Les mâchoires 12 et 13 sont à cette étape respectivement seulement à demi fermées.As shown in Figure 2, when in a first step of crimping method, inserting the end 2 of the cable 3 inside the barrel 7, pushing this end 2 until at least a part of the strands stripped 10 is presented at the level of the tubular portion 14. The cable 3 is sufficiently stripped so that in the position inserted in the 7, a second part of the strands 10 are also located in the frustoconical portion of the barrel 7. The jaws 12 and 13 are at this stage respectively only half closed.

Le contact 1 présente de préférence une collerette 15 pour coopérer avec des rebords 16 de la première mâchoire 12. De préférence, la première mâchoire 12 comporte des rebords en face-à-face 16' et 16" entre lesquelles la collerette 15 est retenue. Par ailleurs la coopération entre les bords chanfreinés et la paroi extérieur tronconique limite également la mobilité du contact 1 selon l'axe 8 à l'intérieur de l'outil de sertissage 4.The contact 1 preferably has a flange 15 to cooperate with flanges 16 of the first jaw 12. Preferably, the first jaw 12 has face-to-face flanges 16 'and 16 "between which the flange 15 is retained. Moreover the cooperation between the edges chamfered and the frustoconical outer wall also limits the mobility of the contact 1 along the axis 8 inside the crimping tool 4.

Principalement une mâchoire telle que 12 ou 13 comporte respectivement une ou plusieurs parties mobiles pour coopérer ensemble. Ces parties pouvant se rapprocher et s'écarter les unes des autres pour définir un espace à dimension variable entre ces deux parties. D'autre part ces deux parties peuvent être ajustées en position l'une vis-à-vis de l'autre pour être disposées correctement soit dans une position ouverte pour recevoir un contact soit dans une position de rétention pour retenir le contact, soit dans une position de sertissage pour comprimer des parois du contact sur le câble 3. Généralement ces parties sont symétriques les unes par rapport aux autres. Elles se rapprochent et s'écartent l'une de l'autre selon un axe de préférence perpendiculaire à l'axe 8 d'allongement du contact 1. En ce qui concerne la deuxième mâchoire 13, celle-ci est de plus dotée d'un moyen de translation pour être déplacé longitudinalement le long de l'axe 8.Mainly a jaw such as 12 or 13 comprises respectively one or more movable parts to cooperate together. These parts can come closer and move away from each other to define a space with variable dimension between these two parts. On the other hand these two parts can be adjusted in position one vis-à-vis the other to be properly positioned either in an open position for receive a contact either in a retention position to hold the contact, either in a crimping position to compress walls of the contact on the cable 3. Generally these parts are symmetrical, some compared to others. They come closer and move away from each other according to an axis preferably perpendicular to the axis 8 of elongation of the contact 1. Regarding the second jaw 13, it is also endowed with a translation means for being moved longitudinally along the axis 8.

Au cours d'une première étape, on sertit premièrement la portion tubulaire 14 disposée entre les parties mobiles de la première mâchoire 12 selon un mouvement radial de mâchoire par rapport à l'axe 8. Les parties de la mâchoire 12 se rapprochent les unes des autres pour venir contraindre la portion 14 autour de l'extrémité terminale 17 des brins dénudés 10. Les parties constituant la mâchoire 12 sont rapprochées l'une de l'autre selon des forces dirigées radialement. Les forces sont équivalantes. On obtient ainsi un rapprochement des parties de la première mâchoire 12 de part et d'autre de la portion 14. Ce rapprochement est d'une part limité par la présence de la collerette 15 contre laquelle des parois 16"' respectivement sur chacune des parties de la mâchoire 12 viennent buter. Etant donné que le contact 1 est retenu dans le moyen de sertissage 4 par la coopération avec les parois 16' et 16", le rapprochement des parties de la mâchoire 12 a pour simple effet une compression radiale, sans aucune contrainte axiale.During a first step, the portion is crimped first tubular 14 disposed between the moving parts of the first jaw 12 in a radial movement of the jaw with respect to the axis 8. The parts of the jaw 12 come closer to each other to come to constrain the portion 14 around the end 17 of the strands stripped 10. The parts constituting the jaw 12 are brought closer to one another according to radially directed forces. The forces are equivalent. We obtain thus a rapprochement of the parts of the first jaw 12 of share and on the other hand of the portion 14. This approximation is on the one hand limited by the presence of the collar 15 against which walls 16 "'respectively on each of the parts of the jaw 12 abut. Given that the contact 1 is retained in the crimping means 4 by the cooperation with the walls 16 'and 16 ", the approximation of the parts of the jaw 12 a for simple effect a radial compression, without any axial stress.

Par exemple, lorsque les parties de la mâchoire 12 sont approchées, on obtient une forme légèrement bombée au milieu et légèrement plus resserrée aux deux extrémités de la portion 14 qui est retenue entre les parties de la mâchoire 12.For example, when the parts of the jaw 12 are approached, a slightly domed shape is obtained in the middle and slightly more tightened at the two ends of the portion 14 which is retained between the parts of the jaw 12.

Comme représenté figure 4, au cours d'une deuxième étape, la première mâchoire 12 reste ainsi enfoncée dans la portion 14, alors que la deuxième mâchoire 13 est elle déplacée axialement le long de l'axe 8 de manière à venir prendre appui contre des pourtours extérieurs 18 de la portion tronconique du fût 7. Du fait de la forme des parties de la deuxième mâchoire 13, le déplacement axial le long de l'axe 8 de ces deux parties entraíne un écrasement progressif des parois 18. Celles-ci sont contraintes par les rebords 19 disposés en vis-à-vis l'un de l'autre, respectivement sur les parties 20, 21 de la deuxième mâchoire 13. De préférence, un écartement des parties 20, 21 est tel qu'une distance entre les rebords respectivement 19 est légèrement supérieure au diamètre extérieur de brins dénudés 10 et successivement de la gaine 11. On obtient ainsi un sertissage par tréfilage, où le fût arrière 7, comme il est présenté sur la figure 5, est serti au fur et à mesure sur les brins dénudés 10 et ensuite sur la gaine 11. On obtient ainsi un sertissage qui donne encore une allure légèrement tronconique au fût 7.As shown in FIG. 4, during a second step, the first jaw 12 remains thus embedded in the portion 14, while the second jaw 13 is it moved axially along the axis 8 of way to come to bear against external perimeters 18 of the truncated portion of the barrel 7. Due to the shape of the parts of the second jaw 13, the axial displacement along the axis 8 of these two parts causes a progressive crushing of the walls 18. These are constrained by the flanges 19 arranged vis-à-vis one another, respectively on the parts 20, 21 of the second jaw 13. Preferably, a spacing of the parts 20, 21 is such that a distance between the flanges respectively 19 is slightly greater than the outer diameter of strands stripped 10 and successively of the sheath 11. This provides a crimp by drawing, where the rear shank 7, as shown in Figure 5, is crimped as the bare strands 10 and then on the sheath 11. gets a crimp that still gives a slight look frustoconical barrel 7.

Par ce procédé, lorsque la deuxième mâchoire 13 est déplacée axialement, les brins, sur lesquels elle sertit progressivement la portion tronconique 18, ne sont pas entraínés dans ce même mouvement axial : ils sont retenus à leur extrémité la plus terminale par la première mâchoire 12. Ainsi on assure l'intégrité des brins du câble même au cours de l'opération de sertissage.By this method, when the second jaw 13 is moved axially, the strands, on which it gradually crimped the portion frustoconical 18, are not driven in this same axial movement: they are retained at their most terminal end by the first jaw 12. This ensures the integrity of the strands of the cable even during the operation crimping.

De préférence, dans l'outil de sertissage 4, au début de la première étape de sertissage, les deux mâchoires 12 et 13 sont accolées entre elles. Une fois le premier sertissage effectué au niveau de la portion cylindrique 14, alors la deuxième mâchoire 13 s'écarte progressivement de la première mâchoire 12 pour longer sur toute sa longueur le fût 7. Cette deuxième mâchoire 13 est déplacée jusqu'à une terminaison du fût 7, à savoir jusqu'à l'ouverture 9 du fût 7.Preferably, in the crimping tool 4, at the beginning of the first crimping step, the two jaws 12 and 13 are contiguous to each other. Once the first crimping is performed at the cylindrical portion 14, then the second jaw 13 is gradually moving away from the first jaw 12 to run along its entire length the barrel 7. This second jaw 13 is moved to a termination of the barrel 7, namely up to the opening 9 of the barrel 7.

De préférence, le sertissage effectué par la première mâchoire 12 correspond à un sertissage en quatre ou huit points. Les parties de la première mâchoire 12 peuvent par exemple être au nombre de deux et comporter par exemple chacune quatre points de pression à venir appliquer contre le pourtour extérieur de la portion 14. Dans une variante, on peut prévoir de tourner de présenter uniquement deux points de pression sur chacune des parties de la mâchoire 12. Dans ce cas, pour obtenir les huit points de sertissage, on peut prévoir d'imposer une rotation d'environ 45° au contact 1, et de le translater légèrement le long de l'axe 8. Dans cette variante, alors on peut obtenir une disposition de ces huit points de sertissage en quinconce sur le pourtour extérieur du tronçon cylindrique 14. Cette position particulière permet de fournir une meilleure résistance du sertissage vis-à-vis des efforts de traction axiale.Preferably, the crimping performed by the first jaw 12 corresponds to a crimp in four or eight points. The parts of the first jaw 12 may for example be two in number and For example, each of them has four pressure points to apply against the outer circumference of the portion 14. Alternatively, it may be plan to turn to present only two pressure points on each part of the jaw 12. In this case, to get the eight crimping points, it is possible to impose a rotation of approximately 45 ° contact 1, and to translate it slightly along the axis 8. In this variant, then one can get a disposition of these eight points of staggered crimping on the outer periphery of the cylindrical section 14. This particular position allows to provide a better resistance of the crimping vis-à-vis axial tensile forces.

Dans un mode de réalisation préféré, le moyen de sertissage 4 comporte une gâchette qui permet d'engager successivement la première mâchoire 12 autour du contact 1 et de directement enchaíner cette insertion de la première mâchoire 12 dans le contact 1 par un déplacement de la deuxième mâchoire 13 le long de ce contact 1 pour assurer le sertissage complet.In a preferred embodiment, the crimping means 4 has a trigger that allows to successively engage the first jaw 12 around contact 1 and directly enchaine this insertion of the first jaw 12 in the contact 1 by a displacement of the second jaw 13 along this contact 1 to ensure crimping full.

Lorsque le sertissage par les deux mâchoires 12 et 13 est terminé, alors la deuxième mâchoire 13 revient automatiquement à côté de la première mâchoire 12, et les parties respectives de chacune des mâchoires 12 et 13 s'ouvrent à nouveau pour permettre de sortir l'extrémité du câble munie de son contact 1 désormais serti autour. Dans cette position ouverte, l'outil de sertissage peut recevoir un nouveau contact tel que 1 à sertir sur une nouvelle extrémité telle que 2.When the crimping by the two jaws 12 and 13 is completed, then the second jaw 13 automatically returns next to the first jaw 12, and the respective parts of each of the jaws 12 and 13 open again to allow the end of the cable to come out provided with his contact 1 now crimped around. In this open position, the crimping tool can receive a new contact such as 1 crimp on a new end such as 2.

Claims (8)

Procédé de sertissage d'un contact (1) sur une extrémité (2) d'un câble (3), le contact comportant un fût (7) à l'intérieur duquel l'extrémité à serir est insérée, caractérisé en ce que on serre radialement une première mâchoire (12) d'un moyen des sertissage (4) sur le fût de manière à le sertir à un premierniveau (14) sur l'extrémité, on maintient cette première mâchoire en position serrée, tout en déplaçant une deuxième mâchoire (13) du moyen de sertissage le long du fût pour sertir le fût sur toute sa longueur autour de l'extrémité du câble. Method of crimping a contact (1) on one end (2) of a cable (3), the contact comprising a shank (7) inside which the end to be inserted is inserted, characterized in that radially clamping a first jaw (12) of crimping means (4) on the barrel so as to crimp it to a first level (14) on the end, this first jaw is held in a tight position, while moving a second jaw (13) of the crimping means along the barrel to crimp the barrel along its entire length around the end of the cable. Procédé selon la revendication 1 caractérisé en ce que la deuxième mâchoire est déplacée depuis le premier niveau jusqu'à une ouverture (9) du fût.Method according to claim 1 characterized in that the second jaw is moved from the first level to an opening (9) of the barrel. Procédé selon l'une des revendications 1 à 2 caractérisé en ce qu'on insère l'extrémité partiellement dénudée (10) à l'intérieur du fût.Process according to one of Claims 1 to 2, characterized in that the partially stripped end (10) is inserted inside the drum. Procédé selon l'une des revendications 1 à 3 caractérisé en ce qu'on sertit un fût en cuivre sur des brins aluminium du câble.Process according to one of Claims 1 to 3, characterized in that a copper drum is crimped onto aluminum strands of the cable. Procédé selon l'une des revendications 1 à 4 caractérisé en ce qu'on sertit le câble en huit points à l'aide de la première mâchoire.Method according to one of Claims 1 to 4, characterized in that the cable is crimped at eight points by means of the first jaw. Procédé selon l'une des revendications 1 à 5 caractérisé en ce qu'on exerce une pression radiale sur le câble avec la première mâchoire.Method according to one of claims 1 to 5 characterized in that it exerts a radial pressure on the cable with the first jaw. Procédé selon l'une des revendications 1 à 6 caractérisé en ce qu'on appuie une gâchette du moyen de sertissage pour entraíner successivement l'enfoncement de la première mâchoire et le déplacement de la deuxième mâchoire.Method according to one of claims 1 to 6 characterized in that one presses a trigger of the crimping means to successively drive the depression of the first jaw and the displacement of the second jaw. Procédé selon l'une des revendications 1 à 7 caractérisé en ce que la deuxième mâchoire est refermée autour du câble pour présenter une ouverture légèrement supérieure au diamètre du câble et légèrement inférieur au diamètre extérieur du fût.Method according to one of claims 1 to 7 characterized in that the second jaw is closed around the cable to have an opening slightly greater than the diameter of the cable and slightly less than the outside diameter of the barrel.
EP03102082A 2002-07-17 2003-07-10 Method for crimping a contact to strands of a cable Expired - Lifetime EP1383211B1 (en)

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FR0209088A FR2842660B1 (en) 2002-07-17 2002-07-17 METHOD FOR CRIMPING A CONTACT ON BANDS OF A CABLE
FR0209088 2002-07-17

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US20040121658A1 (en) 2004-06-24
DE60300002T2 (en) 2005-01-20
CA2434594A1 (en) 2004-01-17
DE60300002D1 (en) 2004-06-24
FR2842660A1 (en) 2004-01-23
ATE267477T1 (en) 2004-06-15
FR2842660B1 (en) 2005-04-29
US7010857B2 (en) 2006-03-14
EP1383211B1 (en) 2004-05-19

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