EP0122826B1 - Easily connectible and directly solderable multi-wired electrical conductor - Google Patents

Easily connectible and directly solderable multi-wired electrical conductor Download PDF

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Publication number
EP0122826B1
EP0122826B1 EP84400477A EP84400477A EP0122826B1 EP 0122826 B1 EP0122826 B1 EP 0122826B1 EP 84400477 A EP84400477 A EP 84400477A EP 84400477 A EP84400477 A EP 84400477A EP 0122826 B1 EP0122826 B1 EP 0122826B1
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EP
European Patent Office
Prior art keywords
conductor
binder
solder flux
conductor according
wires
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Expired
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EP84400477A
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German (de)
French (fr)
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EP0122826A1 (en
Inventor
Germaine Binder
Albert Joye
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Essex SAS
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Essex SAS
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Priority to AT84400477T priority Critical patent/ATE25164T1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
    • H01B13/06—Insulating conductors or cables
    • H01B13/16—Insulating conductors or cables by passing through or dipping in a liquid bath; by spraying
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B5/00—Non-insulated conductors or conductive bodies characterised by their form
    • H01B5/08—Several wires or the like stranded in the form of a rope
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B7/00—Insulated conductors or cables characterised by their form
    • H01B7/04—Flexible cables, conductors, or cords, e.g. trailing cables

Definitions

  • the present invention relates to a multi-wire electrical conductor which is easily connectable and directly weldable.
  • Electrical conductors are, in most of their uses, connected to devices, electrical components, or other electrical conductors. In connection operations, an electrical conductor is often cut to the required length and its ends are stripped and inserted into connectors or connection lugs, or soldered at their connection points.
  • Certain known multi-wire conductors have their bare or tinned elementary wires maintained assembled by tin or a fusible metal alloy or a plastic material. If their ends are cut or stripped their elementary strands or threads do not flourish. These multi-wire conductors are indeed easily connectable, however during their welding or soldering at their connection points, these known multi-wire conductors require a supply of a solder flux and most often a supply of solder. It appears that these known multi-wire conductors are not directly weldable or brazable.
  • the conductive core of this electrical conductor comprises a core formed at least of a metal wire and of a freely sliding envelope around it. core and made of metallic wires glued against each other. When the conductor is cut and stripped, the conductive core does not flourish thanks to this envelope formed of wires glued to each other, which facilitates its connection.
  • An important characteristic described is the use of materials which achieve adhesion of the metal wires which form this envelope but prevent any bonding between this envelope and the core of the conductive core of this conductor.
  • tin or a tin alloy can be used to form wires constituting this envelope or their coating, and nickel or chromium to form the core, its component wires or their coating.
  • nickel or chromium to form the core, its component wires or their coating.
  • the aim of the present invention is to avoid these drawbacks, makes it possible to produce a multi-wire electrical conductor the ends of which, cut and / or stripped on the one hand, do not have strands of strands or twists that are flourishing or capable of flourishing easily, which interfere with the introduction of these ends into connectors and connection lugs, and their welding at the connection points and on the other hand, are directly weldable or solderable, without requiring neither the addition of solder or fuse alloy metal, nor flux Welding.
  • a multi-wire electrical conductor having a conductive core formed by one or more strands of elementary metal wires, coated with a layer of metal or fusible alloy usable as solder, is characterized in that it comprises a solder flux enveloping these elementary metal wires and fulfilling at least two functions, a function of a binder for holding these elementary wires in their assembled state facilitating the connection of the conductor, and an inherent function of solder flux to allow direct welding of the conductor to its connection point under the effect of heat and without the addition of material.
  • a multi-wire electrical conductor 1 usually comprises a conductive core formed by one or more strands or twists of elementary metal wires 2 schematically illustrated in FIG. 1. This electrical conductor 1 is often protected by an outer sheath, not shown, formed by one or more layers of electrically insulating material.
  • the elementary wires 2 are frequently individually tinned metal wires.
  • the conductor 1 is transversely cut and rid of its outer sheath at its ends, the strands or elementary wires 2 of its conductive core, relax and open out freely or tend to open out at the slightest mechanical shock.
  • a blooming of the strands or elementary wires 2 of the stripped ends of the conductor 1 makes it difficult to solder them or introduce them into usual connectors or connection lugs (not shown).
  • the usual tinning of the metallic core of the elementary wires 2 is intended to protect these wires against corrosion or oxidation and to allow soldering.
  • their conductive core is brought to a temperature above 232 ° C, the melting temperature of tin, the elementary wires 2 after cooling do not adhere to each other to form a rigid assembly and do not weld at their points of connection.
  • This difficulty of self-welding and welding of these elementary wires or strands 2 is due to the pollution of the tin layer which covers these wires, by oxides formed by residues of wire drawing lubricant, of plastic material covering them or of anticorrosion agent used.
  • These elementary wires or tinned strands 2 usually require, for their agglomeration or their welding at a connection point, a supply of metal or of fusible alloy and of solder flux.
  • a multi-wire electrical conductor 3 illustrated in FIG. 2, comprises a conductive core formed by one or more strands or twists 4 of elementary wires or strands 5 individually coated with a layer of metal or alloy fuse usable as solder 6 such as tin, and a binder or maintenance product 7 consisting of a material or a mixture of materials.
  • This binder 7 is film-forming, that is to say capable of forming a film, adherent, non-corrosive and preferably fusible, and provides at least two functions, a function of maintaining the elementary wires or strands 5 in their assembled state and a solder flux function.
  • the metal or the fusible alloy 6 covering the elementary wires 5 consists of a metal or alloy usually serving as a solder such as tin or a tin-lead alloy.
  • the multi-wire conductor 3 can also be made rigid over its entire length or locally, that is to say at any point along its length or at its ends by welding the elementary wires 5 together.
  • the points of the conductor where rigidity must be obtained are brought to a temperature above the melting temperature of the metal layer or of the fusible alloy usable as soldering 6 of the elementary wires 5.
  • the binder layer 7 playing the role of solder flux facilitates their agglomeration by welding.
  • the heating of the conductor 3 can be carried out according to a technique known by hot air, by induction, by Joule effect or by high frequency.
  • the binder 7 is constituted by a rosin or an activated rosin or a rosin activated or not, and plasticized.
  • an activated and plasticized rosin comprises a 20% by weight solution in isopropyl alcohol of a rosin modified by 0.2% by weight relative to the dry matter of an organic chloride such as mono or diethylamine hydrochloride and by 10% by weight relative to the dry matter of a plasticizing resin such as a polyvinyl alcohol.
  • the application of the binder 7 to the conductive core of the multi-wire electrical conductor 3 is done by dipping, by spraying or by another known technique during the manufacture of the strand or before the installation of the protective sheath of the conductor 3.
  • the application of the binder 7 is done by dipping.
  • a strand 8 made up of 19 elementary copper wires, diameter 0.20 mm, individually coated with a layer of tin three microns thick, is unwound from a storage coil 9 and then introduced into a solution 10 of binder 7, contained in a container 11.
  • the strand 8 filled with binder 7 is taken out of the tank 11 stripped of an excess of product by a wiping member by compressed air 12, before being introduced into a hot air drying device 13 and then wound up in a reel of storage 14.
  • the dipping application of the binder 7 can be carried out on a strand of wires 5 during manufacture.
  • the application of the binder 7 is done by spraying, during a stranding operation of the elementary wires 5.
  • a solution of binder 7 is sprayed by a device 15 on the elementary wires 5 constituting a twist 4 before they enter a twist 16.
  • a sample of this conductor is cut transversely. In the cut end of this conductor 3, it is found that the elementary wires or strands 5 remain well grouped. A section of this sample is brought to a temperature of 250 ° C. which is higher than the melting temperature of the tin. After cooling, it is found that in this conductor section all the elementary wires or strands 5 constituting the conductive core are welded together.
  • a multi-wire electrical conductor 3 produced according to the invention thus comprises a multi-wire conductive core formed by one or more strands, which can be cut and stripped without at the level of this cut the elementary wires or strands 5 constituting it break apart and s flourish.
  • the connection operations carried out on such a conductor are therefore facilitated and are capable of being fully automated as shown in FIGS. 5 and 6.
  • FIGS. 5 and 6 In these figures the connection of a barrel 20, for example internally tinned, is shown, from a connector to a strand 21.
  • the strand 21, the outside diameter of which is very slightly smaller than the inside diameter of the barrel, is introduced (FIG. 5) into the latter and heating means 22 surrounding the barrel ensure the melting of the coating of metal or fusible alloy usable as solder 6 coating the strand 21 and tin coating the inside of the barrel, which allows soldering without adding material and solder flux.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Insulated Conductors (AREA)
  • Non-Insulated Conductors (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Multi-Conductor Connections (AREA)

Abstract

A readily connectable and directly soldered multiwire electric conductor comprises a conducting core of assembled elementary wires each provided with a coating of metal or fusible alloy which can be employed as a solder. The conductor further comprises a binder which performs two functions, namely the function of retaining the elementary wires in their assembled state in order to facilitate the connection of the conductor and the function of soldering flux.

Description

La présente invention concerne un conducteur électrique multifilaire aisément connectable et directement soudable.The present invention relates to a multi-wire electrical conductor which is easily connectable and directly weldable.

Les conducteurs électriques sont, dans la plupart de leurs utilisations, reliés à des appareils, à des composants électriques, ou à d'autres conducteurs électriques. Dans les opérations de connexion, un conducteur électrique est souvent coupé à la longueur exigée et ses extrémités sont dénudées et insérées dans des connecteurs ou des cosses de connexion, ou soudées à leurs points de connexion.Electrical conductors are, in most of their uses, connected to devices, electrical components, or other electrical conductors. In connection operations, an electrical conductor is often cut to the required length and its ends are stripped and inserted into connectors or connection lugs, or soldered at their connection points.

Pour un conducteur monofilaire, ces opérations habituellement se font facilement car son âme conductrice est relativement rigide.For a single-wire conductor, these operations are usually carried out easily because its conductive core is relatively rigid.

Quand il s'agit d'un conducteur multifilaire, son âme conductrice formée de fils élémentaires assemblés en un ou plusieurs torons ou tordons, est relativement souple. En outre, dans les extrémités coupées et dénudées de ce conducteur, les brins ou fils élémentaires des torons se relâchent et s'épanouissent ou sont prêts à s'épanouir au moindre choc mécanique.When it is a multi-wire conductor, its conductive core formed of elementary wires assembled in one or more strands or twists, is relatively flexible. In addition, in the cut and stripped ends of this conductor, the strands or elementary strands of the strands relax and flourish or are ready to flourish at the slightest mechanical shock.

L'opération d'insertion de ces extrémités dans des connecteurs ou des cosses de connexion ou l'opération de soudage ou de brasage de ces extrémités aux points de connexion devient délicate.The operation of inserting these ends into connectors or connection lugs or the welding or brazing operation of these ends at the connection points becomes delicate.

Cette difficulté s'avère encore plus grande dans le cas d'une exécution des opérations de connexions de ce conducteur par des machines automatiques.This difficulty is even greater in the case of execution of the operations of connection of this conductor by automatic machines.

Jusqu'à présent pour de telles opérations de connexion on ne trouve pas de conducteurs électriques multifilaires aisément connectables et directement soudables et brasables.Up to now, for such connection operations, there are no multi-wire electrical conductors which are easily connectable and directly solderable and solderable.

Certains conducteurs multifilaires connus ont leurs fils élémentaires nus ou étamés maintenus assemblés par de l'étain ou un alliage métallique fusible ou une matière plastique. Si leurs extrémités sont coupées ou dénudées leurs brins ou fils élémentaires ne s'épanouissent pas. Ces conducteurs multifilaires sont en effet facilement connectables, cependant lors de leur soudage ou brasage à leurs points de connexion, ces conducteurs multifilaires connus exigent un apport d'un flux de soudure et le plus souvent un apport de soudure. Il en ressort que ces conducteurs multifilaires connus ne sont pas directement soudables ou brasables.Certain known multi-wire conductors have their bare or tinned elementary wires maintained assembled by tin or a fusible metal alloy or a plastic material. If their ends are cut or stripped their elementary strands or threads do not flourish. These multi-wire conductors are indeed easily connectable, however during their welding or soldering at their connection points, these known multi-wire conductors require a supply of a solder flux and most often a supply of solder. It appears that these known multi-wire conductors are not directly weldable or brazable.

Les mêmes inconvénients se révèlent également dans un conducteur électrique décrit dans le GB-A-2 085 644. L'âme conductrice de ce conducteur électrique comprend un noyau formé au moins d'un fil métallique et d'une enveloppe coulissante librement autour de ce noyau et constitué de fils métalliques collés les uns contre les autres. Quand le conducteur est coupé et dénudé, l'âme conductrice ne s'épanouit pas grâce à cette enveloppe formée de fils collés les uns aux autres, ce qui facilite sa connexion. Une caractéristique importante décrite est l'utilisation des matériaux qui réalisent une adhérence des fils métalliques qui forment cette enveloppe mais empêchent tout collage entre cette enveloppe et le noyau de l'âme conductrice de ce conducteur. Pour un conducteur soudable par exemple, de l'étain ou un alliage d'étain peut être utilisé pour former des fils constituant cette enveloppe ou leur revêtement, et du nickel ou chrome pour former le noyau, ses fils composants ou leur revêtement. Cette non-adhérence entre le noyau et l'enveloppe de l'âme du conducteur exige dans une connexion soudée du conducteur, un apport de matière. Un tel conducteur n'est pas de ce fait directement soudable.The same drawbacks are also revealed in an electrical conductor described in GB-A-2 085 644. The conductive core of this electrical conductor comprises a core formed at least of a metal wire and of a freely sliding envelope around it. core and made of metallic wires glued against each other. When the conductor is cut and stripped, the conductive core does not flourish thanks to this envelope formed of wires glued to each other, which facilitates its connection. An important characteristic described is the use of materials which achieve adhesion of the metal wires which form this envelope but prevent any bonding between this envelope and the core of the conductive core of this conductor. For a weldable conductor for example, tin or a tin alloy can be used to form wires constituting this envelope or their coating, and nickel or chromium to form the core, its component wires or their coating. This non-adhesion between the core and the envelope of the core of the conductor requires, in a welded connection of the conductor, an addition of material. Such a conductor is therefore not directly weldable.

La présente invention ayant pour but d'éviter ces inconvénients, permet de réaliser un conducteur électrique multifilaire dont les extrémités coupées et/ou dénudées d'une part ne présentent pas de brins de torons ou tordons en épanouissement ou susceptibles de s'épanouir facilement, qui gênent l'introduction de ces extrémités dans des connecteurs et des cosses de connexion, et leur soudage aux points de connexion et d'autre part, sont directement soudables ou brasables, sans exiger ni apport de soudure ou métal en alliage fusible, ni flux de soudure.The aim of the present invention is to avoid these drawbacks, makes it possible to produce a multi-wire electrical conductor the ends of which, cut and / or stripped on the one hand, do not have strands of strands or twists that are flourishing or capable of flourishing easily, which interfere with the introduction of these ends into connectors and connection lugs, and their welding at the connection points and on the other hand, are directly weldable or solderable, without requiring neither the addition of solder or fuse alloy metal, nor flux Welding.

Selon l'invention un conducteur électrique multifilaire, ayant une âme conductrice formée de un ou plusieurs torons de fils métalliques élémentaires, revêtus d'une couche de métal ou alliage fusible utilisable comme soudure, est caractérisé en ce qu'il comprend un flux de soudure enveloppant ces fils métalliques élémentaires et remplissant au moins deux fonctions, une fonction d'un liant de maintien de ces fils élémentaires dans leur état assemblé facilitant la connexion du conducteur, et une fonction propre de flux de soudure pour permettre un soudage direct du conducteur à son point de connexion sous l'effet de la chaleur et sans apport de matière.According to the invention a multi-wire electrical conductor, having a conductive core formed by one or more strands of elementary metal wires, coated with a layer of metal or fusible alloy usable as solder, is characterized in that it comprises a solder flux enveloping these elementary metal wires and fulfilling at least two functions, a function of a binder for holding these elementary wires in their assembled state facilitating the connection of the conductor, and an inherent function of solder flux to allow direct welding of the conductor to its connection point under the effect of heat and without the addition of material.

De cette manière on facilite l'automatisation de la connexion d'un tel conducteur à un connecteur. En effet pour réaliser une connexion brasée, il suffit de chauffer l'ensemble à connecter sans apport ni de matière, ni de flux de soudure.In this way it facilitates the automation of the connection of such a conductor to a connector. Indeed, to make a brazed connection, it suffices to heat the assembly to be connected without adding either material or solder flux.

Pour mieux faire comprendre l'invention on en décrit ci-après un certain nombre d'exemples de réalisation illustrés par des dessins ci-annexés dont :

  • La figure 1 représente une vue schématique d'une coupe transversale d'une âme conductrice d'un conducteur multifilaire connu, formée d'un toron de fils élémentaires,
  • La figure 2 représente une vue schématique et partielle d'une coupe transversale d'une âme conductrice d'un conducteur électrique multifilaire réalisé selon l'invention, formée d'un toron de fils élémentaires maintenus assemblés par un produit de maintien,
  • La figure 3 représente une vue schématique d'une partie d'une chaîne de fabrication du conducteur de la figure 2 selon un exemple de réalisation.
  • La figure 4 représente une vue schématique d'une partie d'une chaîne de fabrication du conducteur de la figure 2 selon un autre exemple de réalisation, et
  • Les figures 5 et 6 illustrent un procédé de réalisation d'une connexion.
To better understand the invention, a number of embodiments are described below, illustrated by the appended drawings, including:
  • FIG. 1 represents a schematic view of a cross section of a conductive core of a known multi-wire conductor, formed of a strand of elementary wires,
  • FIG. 2 represents a schematic and partial view of a cross section of a conductive core of a multifilar electrical conductor produced according to the invention, formed of a strand of elementary wires held together by a hold-down product,
  • FIG. 3 represents a schematic view of part of a production line for the conductor of FIG. 2 according to an example of production.
  • FIG. 4 represents a schematic view of part of a production line for the conductor of FIG. 2 according to another exemplary embodiment, and
  • Figures 5 and 6 illustrate a method of making a connection.

Un conducteur électrique multifilaire 1 comprend habituellement une âme conductrice formée de un ou plusieurs torons ou tordons de fils métalliques élémentaires 2 schématiquement illustrés dans la figure 1. Ce conducteur électrique 1 est souvent protégé par une gaine extérieure non représentée, formée de une ou plusieurs couches de matière électriquement isolante.A multi-wire electrical conductor 1 usually comprises a conductive core formed by one or more strands or twists of elementary metal wires 2 schematically illustrated in FIG. 1. This electrical conductor 1 is often protected by an outer sheath, not shown, formed by one or more layers of electrically insulating material.

Les fils élémentaires 2 sont fréquemment des fils métalliques individuellement étamés. Quand le conducteur 1 est transversalement coupé et débarrassé à ses extrémités de sa gaine extérieure, les brins ou fils élémentaires 2 de son âme conductrice, se relachent et s'épanouissent librement ou tendent à s'épanouir au moindre choc mécanique.The elementary wires 2 are frequently individually tinned metal wires. When the conductor 1 is transversely cut and rid of its outer sheath at its ends, the strands or elementary wires 2 of its conductive core, relax and open out freely or tend to open out at the slightest mechanical shock.

Un épanouissement des brins ou fils élémentaires 2 des extrémités dénudées du conducteur 1 rend difficile leur soudage ou leur introduction dans des connecteurs ou des cosses de connexion habituels (non représentés).A blooming of the strands or elementary wires 2 of the stripped ends of the conductor 1 makes it difficult to solder them or introduce them into usual connectors or connection lugs (not shown).

Dans les conducteurs connus, l'étamage habituel de l'âme métallique des fils élémentaires 2 a pour but de protéger ces fils contre la corrosion ou l'oxydation et de permettre le brasage. Quand leur âme conductrice est portée à une température supérieure à 232 °C, température de fusion de l'étain, les fils élémentaires 2 après refroidissement, n'adhèrent pas entre eux pour former un ensemble rigide et ne se soudent pas à leurs points de connexion.In known conductors, the usual tinning of the metallic core of the elementary wires 2 is intended to protect these wires against corrosion or oxidation and to allow soldering. When their conductive core is brought to a temperature above 232 ° C, the melting temperature of tin, the elementary wires 2 after cooling do not adhere to each other to form a rigid assembly and do not weld at their points of connection.

Dans le cas des conducteurs connus où des fils élémentaires étamés ou non sont maintenus assemblés par de l'étain ou des fils étamés assemblés par un alliage métallique fusible ou une matière plastique, quand ils sont portés à une température supérieure à la température de fusion de l'étain ou de cet alliage ou de cette matière plastique, ces fils n'adhèrent plus entre eux et ne se soudent pas à leurs points de connexion.In the case of known conductors where elementary wires, tinned or not, are kept assembled by tin or tinned wires assembled by a fusible metal alloy or a plastic material, when they are brought to a temperature above the melting temperature of tin or this alloy or this plastic, these wires no longer adhere to each other and do not solder at their connection points.

Cette difficulté d'autosoudure et de soudage de ces fils élémentaires ou brins 2 est due à la pollution de la couche d'étain qui recouvre ces fils, par des oxydes formés par des résidus de lubrifiant de tréfilage, de matière plastique les recouvrant ou d'agent anticorrosion utilisé. Ces fils élémentaires ou brins étamés 2 exigent habituellement pour leur agglomération ou leur soudage à un point de connexion, un apport de métal ou d'alliage fusible et de flux de soudure.This difficulty of self-welding and welding of these elementary wires or strands 2 is due to the pollution of the tin layer which covers these wires, by oxides formed by residues of wire drawing lubricant, of plastic material covering them or of anticorrosion agent used. These elementary wires or tinned strands 2 usually require, for their agglomeration or their welding at a connection point, a supply of metal or of fusible alloy and of solder flux.

Selon l'invention, pour éviter ces inconvénients, un conducteur électrique multifilaire 3, illustré dans la figure 2 comprend une âme conductrice formée de un ou plusieurs torons ou tordons 4 de fils élémentaires ou brins 5 individuellement revêtus d'une couche de métal ou alliage fusible utilisable comme soudure 6 tel que l'étain, et un liant ou produit de maintien 7 constitué par une matière ou un mélange de matières. Ce liant 7 est filmogène, c'est-à-dire susceptible de former une pellicule, adhérent, non corrosif et de préférence fusible, et assure au moins deux fonctions, une fonction de maintien des fils élémentaires ou brins 5 dans leur état assemblé et une fonction de flux de soudure. Sur cette âme conductrice garnie de liant 7, peuvent être déposées une ou plusieurs couches de matière électriquement isolante non représentées, pour former une gaine de protection du conducteur 3.According to the invention, to avoid these drawbacks, a multi-wire electrical conductor 3, illustrated in FIG. 2, comprises a conductive core formed by one or more strands or twists 4 of elementary wires or strands 5 individually coated with a layer of metal or alloy fuse usable as solder 6 such as tin, and a binder or maintenance product 7 consisting of a material or a mixture of materials. This binder 7 is film-forming, that is to say capable of forming a film, adherent, non-corrosive and preferably fusible, and provides at least two functions, a function of maintaining the elementary wires or strands 5 in their assembled state and a solder flux function. On this conductive core filled with binder 7, one or more layers of electrically insulating material, not shown, can be deposited, to form a protective sheath of the conductor 3.

Le métal ou l'alliage fusible 6 recouvrant les fils élémentaires 5 est constitué par un métal ou alliage servant habituellement de soudure tel que l'étain ou un alliage étain-plomb.The metal or the fusible alloy 6 covering the elementary wires 5 consists of a metal or alloy usually serving as a solder such as tin or a tin-lead alloy.

Quand le conducteur multifilaire 3" est coupé et dénudé dans ses extrémités, les brins ou fils élémentaires 5 maintenus par le liant 7 restent dans leur état assemblé.When the multi-wire conductor 3 " is cut and stripped at its ends, the elementary strands or wires 5 held by the binder 7 remain in their assembled state.

Une introduction de telles extrémités, dans les connecteurs ou cosses de connexion est facile. Cette opération peut être réalisée sans difficulté par une machine automatique. En outre, les extrémités dénudées et revêtues de métal ou d'alliage fusible 6 du conducteur 3 sont directement soudables ou brasables sans exiger un apport extérieur de flux de soudure, étant donné que la couche de liant 7 remplit déjà la fonction d'un tel flux.It is easy to insert such ends into connectors or lugs. This operation can be carried out without difficulty by an automatic machine. In addition, the stripped ends coated with metal or a fusible alloy 6 of the conductor 3 are directly weldable or solderable without requiring an external supply of solder flux, since the binder layer 7 already fulfills the function of such a flux.

Selon l'invention, le conducteur multifilaire 3 peut également être rendu rigide sur toute sa longueur ou localement c'est-à-dire en un point quelconque de sa longueur ou à ses extrémités par soudage des fils élémentaires 5 entre eux. A cet effet, les points du conducteur où une rigidité doit être obtenue, sont portés à une température .supérieure à la température de fusion de la couche de métal ou de l'alliage fusible utilisable comme soudure 6 des fils élémentaires 5.According to the invention, the multi-wire conductor 3 can also be made rigid over its entire length or locally, that is to say at any point along its length or at its ends by welding the elementary wires 5 together. To this end, the points of the conductor where rigidity must be obtained are brought to a temperature above the melting temperature of the metal layer or of the fusible alloy usable as soldering 6 of the elementary wires 5.

La couche de liant 7 jouant le rôle de flux de soudure facilite leur agglomération par soudage. Le chauffage du conducteur 3 peut être réalisé selon une technique connue par air chaud, par induction, par effet joule ou par haute fréquence.The binder layer 7 playing the role of solder flux facilitates their agglomeration by welding. The heating of the conductor 3 can be carried out according to a technique known by hot air, by induction, by Joule effect or by high frequency.

Selon l'invention, le liant 7 est constitué par une colophane ou une colophane activée ou une colophane activée ou non, et plastifiée.According to the invention, the binder 7 is constituted by a rosin or an activated rosin or a rosin activated or not, and plasticized.

Selon un exemple de réalisation, une colophane activée et plastifiée comprend une solution à 20 % en poids dans l'alcool isopropylique d'une colophane modifiée par 0,2 % en poids par rapport à la matière sèche d'un chlorure organique tel que le chlorhydrate de mono ou diéthylamine et par 10 % en poids par rapport à la matière sèche d'une résine plastificatrice tel qu'un alcool polyvynilique.According to an exemplary embodiment, an activated and plasticized rosin comprises a 20% by weight solution in isopropyl alcohol of a rosin modified by 0.2% by weight relative to the dry matter of an organic chloride such as mono or diethylamine hydrochloride and by 10% by weight relative to the dry matter of a plasticizing resin such as a polyvinyl alcohol.

L'application du liant 7 sur l'âme conductrice du conducteur électrique multifilaire 3 se fait au trempé, par pulvérisation ou suivant une autre technique connue lors de la fabrication du toron ou avant la pose de la gaine de protection du conducteur 3.The application of the binder 7 to the conductive core of the multi-wire electrical conductor 3 is done by dipping, by spraying or by another known technique during the manufacture of the strand or before the installation of the protective sheath of the conductor 3.

Dans un exemple illustré schématiquement à la figure 3, l'application du liant 7 se fait au trempé. Un toron 8, constitué de 19 fils élémentaires de cuivre, de diamètre 0,20 mm, revêtus individuellement d'une couche d'étain de trois microns d'épaisseur, est déroulé d'une bobine d'emmagasinage 9 puis introduit dans une solution 10 de liant 7, contenue dans un bac 11.In an example illustrated schematically in Figure 3, the application of the binder 7 is done by dipping. A strand 8, made up of 19 elementary copper wires, diameter 0.20 mm, individually coated with a layer of tin three microns thick, is unwound from a storage coil 9 and then introduced into a solution 10 of binder 7, contained in a container 11.

Le toron 8 garni de liant 7 est sorti du bac 11 débarassé d'un excès de produit par un organe d'essuyage par air comprimé 12, avant d'être introduit dans un dispositif de séchage par air chaud 13 puis enroulé dans une bobine de stockage 14.The strand 8 filled with binder 7 is taken out of the tank 11 stripped of an excess of product by a wiping member by compressed air 12, before being introduced into a hot air drying device 13 and then wound up in a reel of storage 14.

L'application au trempé du liant 7 peut être effectuée sur un toron de fils 5 en cours de fabrication.The dipping application of the binder 7 can be carried out on a strand of wires 5 during manufacture.

Dans un autre exemple de réalisation, illustré partiellement et schématiquement dans la figure 4, l'application du liant 7 se fait par pulvérisation, au cours d'une opération de toronnage des fils élémentaires 5. Une solution de liant 7 est pulvérisée par un dispositif 15 sur les fils élémentaires 5 constituant un tordon 4 avant leur entrée dans une tordonneuse 16.In another exemplary embodiment, partially and schematically illustrated in FIG. 4, the application of the binder 7 is done by spraying, during a stranding operation of the elementary wires 5. A solution of binder 7 is sprayed by a device 15 on the elementary wires 5 constituting a twist 4 before they enter a twist 16.

Dans un essai de qualité d'un conducteur multifilaire 3 ayant une âme conductrice formée d'un toron de fils élémentaires 5 étamés, garnie d'un liant 7 constitué par une colophane activée et plastifiée telle que la solution de colophane de l'exemple décrit dans un paragraphe précédent, un échantillon de ce conducteur est coupé transversalement. Dans l'extrémité coupée de ce conducteur 3, il est constaté que les fils élémentaires ou brins 5 restent bien groupés. Un tronçon de cet échantillon est porté à une température de 250 °C qui est supérieure à la température de fusion de l'étain. Après refroidissement, il est constaté que dans ce tronçon de conducteur tous les fils élémentaires ou brins 5 constituant l'âme conductrice sont soudés ensemble.In a quality test of a multi-wire conductor 3 having a conductive core formed of a strand of tinned elementary wires 5, provided with a binder 7 constituted by an activated and plasticized rosin such as the rosin solution of the example described in a previous paragraph, a sample of this conductor is cut transversely. In the cut end of this conductor 3, it is found that the elementary wires or strands 5 remain well grouped. A section of this sample is brought to a temperature of 250 ° C. which is higher than the melting temperature of the tin. After cooling, it is found that in this conductor section all the elementary wires or strands 5 constituting the conductive core are welded together.

Un conducteur électrique multifilaire 3 réalisé selon l'invention comprend ainsi une âme conductrice multifilaire formée de un ou plusieurs torons, qui peut être coupée et dénudée sans qu'au niveau de cette coupe les fils élémentaires ou brins 5 la constituant ne se défassent et s'épanouissent. Les opérations de connexion réalisées sur un tel conducteur sont de ce fait facilitées et sont susceptibles d'être totalement automatisées comme le montrent les figures 5 et 6. Sur ces figures on a représenté la connexion d'un fût 20, par exemple étamé intérieurement, d'un connecteur à un toron 21.A multi-wire electrical conductor 3 produced according to the invention thus comprises a multi-wire conductive core formed by one or more strands, which can be cut and stripped without at the level of this cut the elementary wires or strands 5 constituting it break apart and s flourish. The connection operations carried out on such a conductor are therefore facilitated and are capable of being fully automated as shown in FIGS. 5 and 6. In these figures the connection of a barrel 20, for example internally tinned, is shown, from a connector to a strand 21.

A cet effet le toron 21, dont le diamètre extérieur est très légèrement inférieur au diamètre intérieur du fût, est introduit (fig. 5) dans ce dernier et des moyens de chauffage 22 entourant le fût assurent la fusion du revêtement de métal ou d'alliage fusible utilisable comme soudure 6 enrobant le toron 21 et de l'étain revêtant l'intérieur du fût, ce qui permet un brasage sans apport de matière et de flux de soudure.For this purpose the strand 21, the outside diameter of which is very slightly smaller than the inside diameter of the barrel, is introduced (FIG. 5) into the latter and heating means 22 surrounding the barrel ensure the melting of the coating of metal or fusible alloy usable as solder 6 coating the strand 21 and tin coating the inside of the barrel, which allows soldering without adding material and solder flux.

Claims (8)

1. Multi-wired electric conductor (3), having a conductive core formed of one or a plurality of strands (4) of metallic elementary wires (5), coated with a layer of a fusible metal or alloy usable as solder (6), characterized in that it comprises a solder flux surrounding these metallic elementary wires (5) and having at least two functions, i. e. the function of a binder (7) for holding these elementary wires (5) in their assembled state facilitating the connection of the conductor, and an actual solder flux function permitting the direct soldering of the conductor to its connection point under the action of heat and without addition of material.
2. Conductor according to claim 1, characterized in that the solder flux is film-forming, adherent, and non-corrosive.
3. Conductor according to claim 1, characterized in that the solder flux used as a binder (7) is formed of a colophonium.
4. Conductor according to claim 3, characterized in that the solder flux used as a binder (7) is formed of a colophonium activated by an organic salt.
5. Conductor according to claim 4, characterized in that the solder flux used as a binder (7) is formed of an activated and plastified colophonium.
6. Conductor according to claim 5, characterized in that the solder flux used as a binder (7) is obtained from a 20 percent by weight solution in isopropylic alcohol, of a colophonium modified by 0.2 percent by weight, with respect to the dry material, of an organic chloride such as the mono or diethylanime hydrochloride and by 10 percent by weight with respect to the dry material, of a plastifying resin such as a polyvinyl alcohol, supplied in this core and dried.
7. Conductor according to any of the preceding claims, characterized in that the solder flux used as a binder (7) is applicable on the conductive core by dipping.
8. Conductor according to any of the preceding claims, characterized in that the solder flux used as a binder (7) is applicable on the conductive core by spraying.
EP84400477A 1983-03-18 1984-03-09 Easily connectible and directly solderable multi-wired electrical conductor Expired EP0122826B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84400477T ATE25164T1 (en) 1983-03-18 1984-03-09 EASY TO CONNECT AND DIRECTLY SOLDERABLE ELECTRICAL CONDUCTOR.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8304487A FR2542912B1 (en) 1983-03-18 1983-03-18 EASY CONNECTABLE MULTI-WIRE ELECTRICAL CONDUCTOR
FR8304487 1983-03-18

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EP0122826A1 EP0122826A1 (en) 1984-10-24
EP0122826B1 true EP0122826B1 (en) 1987-01-21

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EP84400477A Expired EP0122826B1 (en) 1983-03-18 1984-03-09 Easily connectible and directly solderable multi-wired electrical conductor

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US (1) US4568797A (en)
EP (1) EP0122826B1 (en)
JP (1) JPS6017805A (en)
AT (1) ATE25164T1 (en)
CA (1) CA1230169A (en)
DE (1) DE3462195D1 (en)
ES (1) ES530684A0 (en)
FR (1) FR2542912B1 (en)
IE (1) IE56093B1 (en)

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Also Published As

Publication number Publication date
EP0122826A1 (en) 1984-10-24
IE56093B1 (en) 1991-04-10
CA1230169A (en) 1987-12-08
JPS6017805A (en) 1985-01-29
FR2542912A1 (en) 1984-09-21
ES8600560A1 (en) 1985-10-01
IE840672L (en) 1984-09-18
US4568797A (en) 1986-02-04
ES530684A0 (en) 1985-10-01
DE3462195D1 (en) 1987-02-26
JPH0412564B2 (en) 1992-03-05
FR2542912B1 (en) 1985-10-04
ATE25164T1 (en) 1987-02-15

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