EP1383201A1 - Improvement method for a binding a contact to stands of a cable - Google Patents

Improvement method for a binding a contact to stands of a cable Download PDF

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Publication number
EP1383201A1
EP1383201A1 EP03102081A EP03102081A EP1383201A1 EP 1383201 A1 EP1383201 A1 EP 1383201A1 EP 03102081 A EP03102081 A EP 03102081A EP 03102081 A EP03102081 A EP 03102081A EP 1383201 A1 EP1383201 A1 EP 1383201A1
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EP
European Patent Office
Prior art keywords
contact
cable
strands
wall
metal layer
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.)
Withdrawn
Application number
EP03102081A
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German (de)
French (fr)
Inventor
Daniel Gloaguen
Thierry Quillet
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Souriau SAS
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Souriau SAS
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Filing date
Publication date
Application filed by Souriau SAS filed Critical Souriau SAS
Publication of EP1383201A1 publication Critical patent/EP1383201A1/en
Withdrawn legal-status Critical Current

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    • 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
    • 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
    • H01R4/58—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 characterised by the form or material of the contacting members
    • H01R4/62—Connections between conductors of different materials; Connections between or with aluminium or steel-core aluminium conductors
    • 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
    • H01R43/16—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for manufacturing contact members, e.g. by punching and by bending

Definitions

  • the subject of the present invention is a method for improving a electrical connection between a contact and strands of a cable. She also has for subject a connector assembly thus obtained. She finds more particularly its use in the aeronautical field where the material embedded with such connector assemblies is often subject to strong variations in physical constraints (temperature, pressure, ). However, the different elements of these connector assemblies are not all made of the same materials. Each material has a coefficient of specific expansion in response to these variations in temperature and pressure. It may result that contact between two materials with different coefficients of expansion can be in contact with one of the other under certain temperature and pressure conditions and no longer be in contact with each other under other conditions.
  • connection between a cable termination and a contact used to form a connection plug for this end of the cable, it is generally expected to form a contact in which a barrel is dug at a first end to receive conductive strands of the cable.
  • This contact has at a second end a male shape or female to be able to be connected with an additional device.
  • the first end of the contact is preferably crimped around the strands of the cable. But despite this crimping, we risk getting connections defective when subjected to variations in temperature and pressure.
  • Another prior art solution consists in manufacturing a ring by machining or stamping in a material with expansion coefficient intermediate. And then this ring must be force-fitted to inside the contact to narrow the opening and thereby decrease the opening of the barrel supposed to receive the strands of the cable.
  • Such a solution can be effective and reliable but it also poses a problem because the realization of rings is an additional step.
  • the precision of the necessary tools is expensive, and the risks of damaging the barrel during assembly are important.
  • the contacts generally having an opening of about 1 millimeter in diameter, mounting a ring in this opening becomes very meticulous and therefore requires long steps. In the event that the ring is incorrectly mounted inside the contact barrel, this contact is permanently rendered unusable. There is therefore a reject rate important with this technique.
  • the object of the invention is to solve the problems posed, namely to propose a reliable connection between a contact and a cable, while proposing a means of mounting and easy realization of such a connector assembly.
  • the invention provides for stamping a metallic layer of material ductile against a contact wall.
  • the metal layer is stamped against an interior wall of the barrel receiving the strands of the cable.
  • the subject of the invention is a method of improving a connection between a contact and a cable comprising strands, the strands of the cable being intended to cooperate with a wall of the contact, characterized in that that an internal metallic layer is pressed against this wall to make the strands cooperate with this metallic layer.
  • the subject of the present invention is a method for improving a connection between a contact and strands of a cable.
  • the first end of the contact may be male and have a outer wall on which the strands of the cable can be supported.
  • this first end of the contact can be female and in this case it has a barrel inside which are inserted the strands of the cable. cable strands.
  • the strands of the cable come into contact with an interior wall of the barrel.
  • the method according to the invention plans to stamp an intermediate metallic layer of ductile material on the contact wall, which must then be brought into contact with the strands of the cable.
  • Figures 1 to 4 show a female contact 1 comprising a cavity 2, or was 2, to receive a cable 3 shown in Figure 4.
  • the object of the invention is to allow the drawing of a layer metal on the contact wall being intended to receive the strands of the cable.
  • Stamping consists of pressing a sheet against a wall of the contact, starting by pushing the center of the sheet inside cavity 2.
  • a means for stamping 5 is specific to the type of contact.
  • Contact 1 is elongated along an axis 6, and cavity 2 forms a barrel of cylindrical shape having an opening 7 perpendicular to this axis 6. Parallel to this axis 6, the barrel 2 has walls 8 forming a periphery of the cavity 2. The walls 8 are provided to cooperate with strands 9 of the cable 3.
  • the metal layer 4 is obtained from a film made of a ductile material, namely, that it can be stretched without breaking.
  • This layer can be made from silver or tin.
  • a silver film with a thickness of of the order of 0.1 millimeter in the case where contact 1 which is to receive this metallic layer has dimensions of the order of 1 millimeter in diameter concerning the opening 7, of the order of 2 to 5 millimeters deep for the walls relative to the axis 6, and these walls 8 themselves having a thickness of the order of 0.1 millimeter.
  • the stamping means 5 preferably comprises a matrix 10 and a punch 11.
  • the punch 11 is used to push the metal layer 4 against the walls 8.
  • the matrix 10 serves to retain the contact 1 in a position given relative to the punch 11 which is in motion.
  • the matrix 10 in this case presses on external walls 12 of contact 1.
  • the punch 11 is preferably made of hardened steel to give it high resistance to wear.
  • the film presented opposite the opening 7 is square, and a center of this square is centered relative to the center of the opening 7.
  • the punch 11 is itself centered along the axis 6.
  • the film formed by the metal layer 4 driven by the punch 11 is disposed along the walls of the punch 11 and the punch 11 entering the cavity 2, this metal layer 4 is plated by the punch 11 on the walls 8. Under the pressure of the punch 11, the film is entrained in the cavity 2, but also it undergoes an elastic deformation which eventually leads to a thinning of the layer of plated film definitely against the wall 8.
  • a surface formed by this film 4 is clearly greater than the opening 7. So when the punch 11 drives a central part of this film 4 inside the cavity 2, a portion 13 of this film remains outside of the opening 7. This excess metal layer 4 is then pressed against of the edges 14 of the opening 7 by a recess 15 of the punch 11. This surplus portion 13 is as shown in Figure 3 broken by the displacement of the die 10 relative to the punch 11 and to the contact 1 nested one inside the other.
  • the matrix 10 is raised along the perimeter outside 12 parallel to the axis 6 in the direction of the opening 7. Thus the part of the additional portion 13 protruding from the rim 14 is severed during the scissor movement made by the matrix 10 relatively at the offset 15. Thus a clear drawing of the layer is obtained metal 4 inside the cavity 2.
  • this punch 11 is removed parallel to the axis 6.
  • an orifice may possibly be provided exhaust air 17 as shown in Figure 4. This orifice 17 therefore connects the cavity 2 at the outer wall 12.
  • the contact 1 thus prepared is thus improved to ensure the connection with the strands 9 of the cable 3.
  • the strands 9 are made of aluminum and the contact body 1 is made of copper, then the metal layer 4 deposited in silver or tin provides a better continuity in the electrical contact established between the strands 9 and the contact 1.

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  • Manufacturing Of Electrical Connectors (AREA)

Abstract

An intermediate metal layer (4) is provided between the cable wires (9) and a cavity wall inside the contact (1) so that the wires are in contact with this layer. The metal layer is formed by an embossing method. An Independent claim comprises a connector comprising a contact and a cable (4) joined using this connection.

Description

La présente invention a pour objet un procédé d'amélioration d'une liaison électrique entre un contact et des brins d'un câble. Elle a également pour objet un ensemble connecteur ainsi obtenu. Elle trouve plus particulièrement son utilisation dans le domaine aéronautique où le matériel embarqué comportant de tels ensembles connecteurs est souvent soumis à de fortes variations des contraintes physiques (température, pression, ...). Or les différents éléments de ces ensembles connecteurs ne sont pas tous réalisés dans les mêmes matériaux. Chaque matériau présente un coefficient de dilatation spécifique en réponse à ces variations de température et de pression. Il peut en résulter que le contact entre deux matériaux à coefficients de dilatation différents puisse être en contact l'un de l'autre sous certaines conditions de température et de pression et ne plus être en contact l'un avec l'autre sous d'autres conditions.The subject of the present invention is a method for improving a electrical connection between a contact and strands of a cable. She also has for subject a connector assembly thus obtained. She finds more particularly its use in the aeronautical field where the material embedded with such connector assemblies is often subject to strong variations in physical constraints (temperature, pressure, ...). However, the different elements of these connector assemblies are not all made of the same materials. Each material has a coefficient of specific expansion in response to these variations in temperature and pressure. It may result that contact between two materials with different coefficients of expansion can be in contact with one of the other under certain temperature and pressure conditions and no longer be in contact with each other under other conditions.

Dans le cadre des connexions électriques, la fiabilité des appareillages électroniques et électriques embarqués à bord de ces équipements est affectée du fait de ces variations. Pour résoudre ce problème de sécurité, on prévoit des solutions pour améliorer la fiabilité des contacts même dans le cadre de ces variations des conditions extérieures physiques.In the context of electrical connections, the reliability of electronic and electrical equipment on board these equipment is affected due to these variations. To resolve this security problem, solutions are planned to improve the reliability of contacts even under these variations in external conditions physical.

Notamment dans le cas des contacts en cuivre devant être reliés à des brins en aluminium d'un câble, le cuivre et l'aluminium ayant des coefficients de dilatation très différents, on observe ces problèmes.Particularly in the case of copper contacts to be connected to aluminum strands of a cable, copper and aluminum having very different coefficients of expansion, we observe these problems.

Concernant la connexion entre une terminaison d'un câble et un contact servant à former une fiche de connexion pour cette extrémité du câble, on prévoit généralement de former un contact dans lequel un fût est creusé à une première extrémité pour y recevoir des brins conducteurs du câble. Ce contact présente à une deuxième extrémité une forme mâle ou femelle pour pouvoir être connecté avec un dispositif complémentaire. La première extrémité du contact est de préférence sertie autour des brins du câble. Mais malgré ce sertissage, on risque d'obtenir des connexions défectueuses lorsqu'il est soumis à des variations de température et de pression. A cet effet, il est connu de disposer entre le contact et les brins du câble un matériau intermédiaire dont le coefficient de dilatation est intermédiaire entre celui du contact et celui des brins du câble. Ainsi, la connexion est garantie en toutes circonstances.Regarding the connection between a cable termination and a contact used to form a connection plug for this end of the cable, it is generally expected to form a contact in which a barrel is dug at a first end to receive conductive strands of the cable. This contact has at a second end a male shape or female to be able to be connected with an additional device. The first end of the contact is preferably crimped around the strands of the cable. But despite this crimping, we risk getting connections defective when subjected to variations in temperature and pressure. For this purpose, it is known to have between the contact and the strands of the cable an intermediate material whose coefficient of expansion is intermediate between that of the contact and that of the cable strands. So the connection is guaranteed in all circumstances.

Les procédés connus pour mettre en oeuvre cette solution sont, par exemple, de placer le contact qui doit recevoir l'extrémité du câble dans un bain électrolytique de manière à ce que la couche intermédiaire puisse se déposer sur des parois intérieures du fût de ce contact. Mais le problème est qu'il est difficile de contrôler l'épaisseur du dépôt électrolytique effectué sur le contact étant donné que le contact présente des formes avec de nombreux recoins, notamment le fût, et que l'épaisseur déposée sur tout le pourtour de cette paroi n'est pas homogène. Par ailleurs, un autre inconvénient de cette technique par dépôt électrolytique est qu'elle constitue une étape lente, donc onéreuse.The known methods for implementing this solution are, by example, to place the contact which must receive the end of the cable in a electrolytic bath so that the intermediate layer can deposit on interior walls of the barrel of this contact. But the problem is that it is difficult to control the thickness of the electrolytic deposit made on contact since contact has shapes with many corners, especially the barrel, and that the thickness deposited on all the periphery of this wall is not homogeneous. By the way, another drawback of this electroplating technique is that it constitutes a slow step, therefore expensive.

Une autre solution de l'état de la technique consiste à fabriquer une bague par usinage ou matriçage dans un matériau à coefficient de dilatation intermédiaire. Et ensuite cette bague doit être emmanchée en force à l'intérieur du contact pour en rétrécir l'ouverture et ainsi diminuer l'ouverture du fût censé recevoir les brins du câble. Une telle solution peut être efficace et fiable mais elle pose également un problème du fait que la réalisation de bagues constitue une étape supplémentaire. De plus pour l'insertion d'une telle bague dans un contact, la précision des outillages nécessaires est coûteuse, et les risques d'endommagement du fût au cours du montage sont importants. En effet, les contacts ayant généralement une ouverture de l'ordre de 1 millimètre de diamètre, le montage d'une bague dans cette ouverture en devient très minutieux et nécessite donc des étapes longues. Dans le cas où la bague est mal montée à l'intérieur du fût du contact, ce contact est définitivement rendu inutilisable. Il y a donc un taux de rebus important avec cette technique.Another prior art solution consists in manufacturing a ring by machining or stamping in a material with expansion coefficient intermediate. And then this ring must be force-fitted to inside the contact to narrow the opening and thereby decrease the opening of the barrel supposed to receive the strands of the cable. Such a solution can be effective and reliable but it also poses a problem because the realization of rings is an additional step. In addition for the insertion of a such ring in a contact, the precision of the necessary tools is expensive, and the risks of damaging the barrel during assembly are important. Indeed, the contacts generally having an opening of about 1 millimeter in diameter, mounting a ring in this opening becomes very meticulous and therefore requires long steps. In the event that the ring is incorrectly mounted inside the contact barrel, this contact is permanently rendered unusable. There is therefore a reject rate important with this technique.

L'invention a pour objet de résoudre les problèmes posés, à savoir de proposer une liaison fiable entre un contact et un câble, tout en proposant un moyen de montage et de réalisation facile d'un tel ensemble connecteur. A cet effet, l'invention prévoit d'emboutir une couche métallique en matériau ductile contre une paroi du contact. Dans le cas où les brins du câble sont insérés à l'intérieur du fût du contact, la couche métallique est emboutie contre une paroi intérieure du fût recevant les brins du câble. A cet effet, dans le procédé selon l'invention il est nécessaire d'utiliser un moyen d'emboutissage d'une surface par exemple plane à l'intérieur d'un fût par exemple cylindrique dont une ouverture est présentée en vis à vis du moyen d'emboutissage.The object of the invention is to solve the problems posed, namely to propose a reliable connection between a contact and a cable, while proposing a means of mounting and easy realization of such a connector assembly. AT for this purpose, the invention provides for stamping a metallic layer of material ductile against a contact wall. In case the strands of the cable are inserted inside the contact barrel, the metal layer is stamped against an interior wall of the barrel receiving the strands of the cable. To this end, in the process according to the invention it is necessary to use a means stamping of a flat surface for example inside a barrel by cylindrical example of which an opening is presented opposite the means stamping.

Dans une variante de l'invention, on prévoit d'emboutir cette couche intermédiaire contre une paroi extérieure de la première extrémité du contact, et contre laquelle peuvent coopérer des brins du câble ou un contact complémentaire.In a variant of the invention, provision is made for stamping this layer intermediate against an outer wall of the first end of the contact, and against which strands of the cable or a additional contact.

L'invention a pour objet un procédé d'amélioration d'une liaison électrique entre un contact et un câble comportant des brins, les brins du câble étant destinés à coopérer avec une paroi du contact, caractérisé en ce qu'on emboutit une couche métallique intermédiaire contre cette paroi pour faire coopérer les brins avec cette couche métallique.The subject of the invention is a method of improving a connection between a contact and a cable comprising strands, the strands of the cable being intended to cooperate with a wall of the contact, characterized in that that an internal metallic layer is pressed against this wall to make the strands cooperate with this metallic layer.

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 d'un contact dans lequel une couche métallique doit être emboutie selon un procédé selon l'invention ;
  • Figure 2 : une vue en coupe d'un contact dans lequel une couche conductrice est emboutie selon un procédé selon l'invention ;
  • Figure 3 : une vue en coupe d'un contact au cours d'une deuxième étape d'un procédé selon l'invention ;
  • Figure 4 : une vue en coupe d'un contact dans lequel une couche métallique a été emboutie 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 for information only and in no way limit the invention. The figures show:
  • Figure 1: a sectional view of a contact in which a metal layer must be stamped according to a method according to the invention;
  • Figure 2: a sectional view of a contact in which a conductive layer is stamped according to a method according to the invention;
  • Figure 3: a sectional view of a contact during a second step of a method according to the invention;
  • Figure 4: a sectional view of a contact in which a metal layer has been stamped according to a method according to the invention.

    • La présente invention a pour objet un procédé d'amélioration d'une liaison entre un contact et des brins d'un câble. Dans un premier mode de réalisation, la première extrémité du contact peut être mâle et présenter une paroi extérieure sur laquelle peuvent être appuyés les brins du câble. Selon un deuxième mode de réalisation, cette première extrémité du contact peut être femelle et dans ce cas elle présente un fût à l'intérieur duquel sont insérés les brins du câble. brins du câble. Dans ce cas, les brins du câble viennent au contact d'une paroi intérieure du fût. Le procédé selon l'invention prévoit d'emboutir une couche métallique intermédiaire en matériau ductile sur la paroi du contact devant ensuite être mise en relation avec les brins du câble.The subject of the present invention is a method for improving a connection between a contact and strands of a cable. In a first mode of embodiment, the first end of the contact may be male and have a outer wall on which the strands of the cable can be supported. according to a second embodiment, this first end of the contact can be female and in this case it has a barrel inside which are inserted the strands of the cable. cable strands. In this case, the strands of the cable come into contact with an interior wall of the barrel. The method according to the invention plans to stamp an intermediate metallic layer of ductile material on the contact wall, which must then be brought into contact with the strands of the cable.

    Les figures 1 à 4 montrent un contact femelle 1 comportant une cavité 2, ou fût 2, pour y recevoir un câble 3 présenté figure 4.Figures 1 to 4 show a female contact 1 comprising a cavity 2, or was 2, to receive a cable 3 shown in Figure 4.

    Le but de l'invention est de permettre l'emboutissage d'une couche métallique sur la paroi du contact étant destinée à venir recevoir les brins du câble. L'emboutissage consiste à venir plaquer une feuille contre une paroi du contact, en commençant par enfoncer le centre de la feuille à l'intérieur de la cavité 2. A cet effet, dans le procédé selon l'invention, on utilise un moyen pour emboutir 5. Le moyen pour emboutir 5 est spécifique au type de contact. Sur les figures 1 à 4, on présente un contact femelle prévu pour coopérer avec un premier moyen d'emboutissage 5 dédié au type précis de cavité 2 de ce contact 1.The object of the invention is to allow the drawing of a layer metal on the contact wall being intended to receive the strands of the cable. Stamping consists of pressing a sheet against a wall of the contact, starting by pushing the center of the sheet inside cavity 2. For this purpose, in the method according to the invention, a means for stamping 5. The means for stamping 5 is specific to the type of contact. In Figures 1 to 4, there is a female contact provided for cooperate with a first stamping means 5 dedicated to the precise type of cavity 2 of this contact 1.

    Le contact 1 est de forme allongée selon un axe 6, et la cavité 2 forme un fût de forme cylindrique présentant une ouverture 7 perpendiculaire à cet axe 6. Parallèlement à cet axe 6, le fût 2 présente des parois 8 formant un pourtour de la cavité 2. Les parois 8 sont prévues pour venir coopérer avec des brins 9 du câble 3.Contact 1 is elongated along an axis 6, and cavity 2 forms a barrel of cylindrical shape having an opening 7 perpendicular to this axis 6. Parallel to this axis 6, the barrel 2 has walls 8 forming a periphery of the cavity 2. The walls 8 are provided to cooperate with strands 9 of the cable 3.

    Pour emboutir une couche métallique contre cette paroi 8, on dispose une couche métallique 4 de forme relativement plane en vis à vis de l'ouverture 7 et perpendiculairement à l'axe 6. La couche métallique 4 est obtenue à partir d'un film réalisé dans un matériau ductile, à savoir, qu'il peut être étiré sans se rompre. Cette couche peut être réalisée à partir d'argent ou d'étain. De préférence, on choisit un film d'argent d'une épaisseur de l'ordre de 0,1 millimètre, dans le cas où le contact 1 qui doit recevoir cette couche métallique a des dimensions de l'ordre de 1 millimètre de diamètre concernant l'ouverture 7, de l'ordre de 2 à 5 millimètres de profondeur pour les parois relativement à l'axe 6, et ces parois 8 ayant elles-mêmes une épaisseur de l'ordre de 0,1 millimètre.To stamp a metal layer against this wall 8, there are a metal layer 4 of relatively flat shape opposite the opening 7 and perpendicular to the axis 6. The metal layer 4 is obtained from a film made of a ductile material, namely, that it can be stretched without breaking. This layer can be made from silver or tin. Preferably, a silver film with a thickness of of the order of 0.1 millimeter, in the case where contact 1 which is to receive this metallic layer has dimensions of the order of 1 millimeter in diameter concerning the opening 7, of the order of 2 to 5 millimeters deep for the walls relative to the axis 6, and these walls 8 themselves having a thickness of the order of 0.1 millimeter.

    Le moyen d'emboutissage 5 comporte préférentiellement une matrice 10 et un poinçon 11. Le poinçon 11 sert à pousser la couche métallique 4 contre les parois 8. La matrice 10 sert à retenir le contact 1 dans une position donnée par rapport au poinçon 11 qui est en mouvement. La matrice 10 appuie dans ce cas sur des parois extérieures 12 du contact 1. Le poinçon 11 est de préférence réalisé en acier trempé pour lui conférer une grande résistance à l'usure. De préférence, le film présenté en face de l'ouverture 7 est carré, et un centre de ce carré est centré relativement au centre de l'ouverture 7. Le poinçon 11 est lui même centré le long de l'axe 6. The stamping means 5 preferably comprises a matrix 10 and a punch 11. The punch 11 is used to push the metal layer 4 against the walls 8. The matrix 10 serves to retain the contact 1 in a position given relative to the punch 11 which is in motion. The matrix 10 in this case presses on external walls 12 of contact 1. The punch 11 is preferably made of hardened steel to give it high resistance to wear. Preferably, the film presented opposite the opening 7 is square, and a center of this square is centered relative to the center of the opening 7. The punch 11 is itself centered along the axis 6.

    Comme il est présenté figure 2, le film formé par la couche métallique 4 entraínée par le poinçon 11 se dispose le long des parois du poinçon 11 et le poinçon 11 entrant dans la cavité 2, cette couche métallique 4 est plaquée par le poinçon 11 sur les parois 8. Sous la pression du poinçon 11, le film est entraíné dans la cavité 2, mais également il subit une déformation élastique qui conduit éventuellement à un amincissement de la couche du film plaquée définitivement contre la paroi 8.As shown in Figure 2, the film formed by the metal layer 4 driven by the punch 11 is disposed along the walls of the punch 11 and the punch 11 entering the cavity 2, this metal layer 4 is plated by the punch 11 on the walls 8. Under the pressure of the punch 11, the film is entrained in the cavity 2, but also it undergoes an elastic deformation which eventually leads to a thinning of the layer of plated film definitely against the wall 8.

    Une surface formée par ce film 4 est nettement supérieure à l'ouverture 7. Donc lorsque le poinçon 11 entraíne une partie centrale de ce film 4 à l'intérieur de la cavité 2, une portion 13 de ce film reste à l'extérieur de l'ouverture 7. Ce surplus de couche métallique 4 est alors plaqué contre des rebords 14 de l'ouverture 7 par un décrochement 15 du poinçon 11. Cette portion en surplus 13 est comme indiqué figure 3 rompue par le déplacement de la matrice 10 relativement au poinçon 11 et au contact 1 imbriqués l'un dans l'autre. La matrice 10 est remontée le long du pourtour extérieur 12 parallèlement à l'axe 6 en direction de l'ouverture 7. Ainsi la partie de la portion supplémentaire 13 dépassant du rebord 14 est sectionnée lors du mouvement de ciseau fait par la matrice 10 relativement au décrochement 15. Ainsi on obtient un emboutissage net de la couche métallique 4 à l'intérieur de la cavité 2.A surface formed by this film 4 is clearly greater than the opening 7. So when the punch 11 drives a central part of this film 4 inside the cavity 2, a portion 13 of this film remains outside of the opening 7. This excess metal layer 4 is then pressed against of the edges 14 of the opening 7 by a recess 15 of the punch 11. This surplus portion 13 is as shown in Figure 3 broken by the displacement of the die 10 relative to the punch 11 and to the contact 1 nested one inside the other. The matrix 10 is raised along the perimeter outside 12 parallel to the axis 6 in the direction of the opening 7. Thus the part of the additional portion 13 protruding from the rim 14 is severed during the scissor movement made by the matrix 10 relatively at the offset 15. Thus a clear drawing of the layer is obtained metal 4 inside the cavity 2.

    Dans le mode de réalisation du procédé présenté, il apparaít que même si le matériau 4 est ductile, celui-ci peut éventuellement subir un éclatement partiel à l'intérieur de la cavité 2 qui aboutit à une rupture de la couche métallique sous la pression du poinçon 11. Cette rupture se fait généralement dans la partie centrale de la couche 4 , celle qui est enfoncée le plus profondément dans la cavité 2. Alors on obtient une répartition de cette couche métallique 4 sur les parois intérieures 8 uniquement sur les parois parallèles à l'axe 6.In the embodiment of the method presented, it appears that even if the material 4 is ductile, it may possibly undergo a partial bursting inside the cavity 2 which results in a rupture of the metal layer under the pressure of the punch 11. This rupture occurs generally in the central part of layer 4, the one that is pressed deepest into the cavity 2. So we get a distribution of this metal layer 4 on the interior walls 8 only on the walls parallel to axis 6.

    Pour retirer le poinçon 11 de l'intérieur de la cavité 2 lorsque la couche métallique 4 a été correctement emboutie, ce poinçon 11 est retiré parallèlement à l'axe 6. Pour ne pas créer de dépression dans la cavité 2 du fait du retrait de ce poinçon 11 et pour éviter un décollement de la couche métallique 4,nouvellement plaquée on peut éventuellement prévoir un orifice d'évacuation d'air 17 comme présenté figure 4. Cet orifice 17 relie donc la cavité 2 à la paroi extérieure 12. To remove the punch 11 from inside the cavity 2 when the metal layer 4 has been correctly stamped, this punch 11 is removed parallel to the axis 6. In order not to create a depression in the cavity 2 of the made of the withdrawal of this punch 11 and to avoid a separation of the layer metallic 4, newly plated, an orifice may possibly be provided exhaust air 17 as shown in Figure 4. This orifice 17 therefore connects the cavity 2 at the outer wall 12.

    Le contact 1 ainsi préparé est ainsi amélioré pour assurer la connexion avec les brins 9 du câble 3. En effet, dans l'hypothèse où les brins 9 sont réalisés en aluminium et le corps du contact 1 est réalisé en cuivre, alors la couche métallique 4 déposée en argent ou en étain assure une meilleure continuité dans le contact électrique établi entre les brins 9 et le contact 1.The contact 1 thus prepared is thus improved to ensure the connection with the strands 9 of the cable 3. In fact, if the strands 9 are made of aluminum and the contact body 1 is made of copper, then the metal layer 4 deposited in silver or tin provides a better continuity in the electrical contact established between the strands 9 and the contact 1.

    A partir de ce contact 1, on prévoit de dénuder partiellement une terminaison 18 du câble 3, de manière à présenter les brins 9 à l'intérieur de la cavité 2. Une fois inséré dans la cavité 2. Par exemple on sertit les parois 8 contre les brins 9. En fait c'est la couche métallique 4 préalablement emboutie qui vient au contact des brins 9, tout en restant plaquée contre la paroi 8. On obtient ainsi un ensemble connecteur entre un contact et un câble.From this contact 1, provision is made to partially strip a termination 18 of cable 3, so as to present the strands 9 inside cavity 2. Once inserted into cavity 2. For example, the walls are crimped 8 against the strands 9. In fact it is the metal layer 4 beforehand stamped which comes into contact with the strands 9, while remaining pressed against the wall 8. This gives a connector assembly between a contact and a cable.

    Claims (10)

    Procédé d'amélioration d'une liaison électrique entre un contact (1) et un câble (3) comportant des brins (9), les brins du câble étant destinés à coopérer avec une paroi (8) du contact, caractérisé en ce qu'on emboutit une couche métallique (4) intermédiaire contre cette paroi pour faire coopérer les brins avec cette couche métallique.Method for improving an electrical connection between a contact (1) and a cable (3) comprising strands (9), the strands of the cable being intended to cooperate with a wall (8) of the contact, characterized in that an intermediate metal layer (4) is stamped against this wall to make the strands cooperate with this metal layer. Procédé selon la revendication 1 caractérisé en ce que des coefficients de dilatation des brins du câble et du contact sont différents, et en ce qu'on choisit de former la couche métallique intermédiaire à partir d'un matériau ductile.Method according to Claim 1, characterized in that the coefficients of expansion of the strands of the cable and of the contact are different, and in that one chooses to form the intermediate metallic layer from a ductile material. Procédé selon l'une des revendications 1 à 2 caractérisé en ce qu'on choisit une couche d'argent ou d'étain à emboutir contre la paroi du contact cuivreux destinée à coopérer avec les brins aluminium du câble.Method according to one of claims 1 to 2 characterized in that a layer of silver or tin is chosen to be pressed against the wall of the copper contact intended to cooperate with the aluminum strands of the cable. Procédé selon l'une des revendications 1 à 3 caractérisé en ce qu'on utilise un moyen (5) pour emboutir comportant une matrice (10) et un poinçon (11), et en ce qu'on place la matrice autour (12) du contact, le poinçon étant destiné à entraíner la couche métallique dans une cavité (2), contre la paroi.Method according to one of Claims 1 to 3, characterized in that a drawing means (5) is used comprising a die (10) and a punch (11), and in that the die is placed around (12) contact, the punch being intended to drive the metal layer in a cavity (2), against the wall. Procédé selon la revendication 4 caractérisé en ce qu'on retire la matrice du contact en sectionnant le pourtour extérieur (16) de la couche métallique de manière à former une collerette au niveau d'une ouverture (7) de la cavité.A method according to claim 4 characterized in that the matrix is removed from the contact by cutting the outer periphery (16) of the metal layer so as to form a flange at an opening (7) of the cavity. Procédé selon l'une des revendications 4 à 5 caractérisé en ce qu'on choisit un poinçon en acier trempé.Method according to one of Claims 4 to 5, characterized in that a hardened steel punch is chosen. Procédé selon l'une des revendications 4 à 6 caractérisé en ce que le fût comporte un orifice (17) pour évacuer l'air contenu dans la cavité lors de l'enfoncement du poinçon.Method according to one of claims 4 to 6 characterized in that the barrel has an orifice (17) for evacuating the air contained in the cavity when the punch is pressed. Procédé selon l'une des revendications 1 à 7 caractérisé en ce qu'on recouvre de la couche métallique une paroi extérieure du contact contre laquelle les brins coopèrent.Method according to one of Claims 1 to 7, characterized in that an external wall of the contact is covered with the metallic layer against which the strands cooperate. Procédé selon l'une des revendications 1 à 8 caractérisé en ce que qu'on utilise une couche métallique de 0,1 millimètre d'épaisseur.Method according to one of Claims 1 to 8, characterized in that a metal layer 0.1 mm thick is used. Ensemble connecteur comportant un contact et un câble, des brins du câble étant insérés dans une cavité du contact, une couche métallique ayant au préalable été emboutie contre cette paroi par un procédé selon l'une des revendications 1 à 9.Connector assembly comprising a contact and a cable, cable strands being inserted into a contact cavity, a layer metal having previously been pressed against this wall by a method according to one of claims 1 to 9.
    EP03102081A 2002-07-17 2003-07-10 Improvement method for a binding a contact to stands of a cable Withdrawn EP1383201A1 (en)

    Applications Claiming Priority (2)

    Application Number Priority Date Filing Date Title
    FR0209089 2002-07-17
    FR0209089A FR2842659B1 (en) 2002-07-17 2002-07-17 METHOD FOR IMPROVING A CONNECTION BETWEEN A CONTACT AND LINKS OF A CABLE

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    EP1383201A1 true EP1383201A1 (en) 2004-01-21

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    EP03102081A Withdrawn EP1383201A1 (en) 2002-07-17 2003-07-10 Improvement method for a binding a contact to stands of a cable

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    US (1) US20040053542A1 (en)
    EP (1) EP1383201A1 (en)
    CA (1) CA2434612A1 (en)
    FR (1) FR2842659B1 (en)

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    Also Published As

    Publication number Publication date
    FR2842659B1 (en) 2005-04-01
    CA2434612A1 (en) 2004-01-17
    US20040053542A1 (en) 2004-03-18
    FR2842659A1 (en) 2004-01-23

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