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EP0148051B1 - Method and device for the fixed electrical connection of braided conductors to current supply surfaces - Google Patents

Method and device for the fixed electrical connection of braided conductors to current supply surfaces Download PDF

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Publication number
EP0148051B1
EP0148051B1 EP84402425A EP84402425A EP0148051B1 EP 0148051 B1 EP0148051 B1 EP 0148051B1 EP 84402425 A EP84402425 A EP 84402425A EP 84402425 A EP84402425 A EP 84402425A EP 0148051 B1 EP0148051 B1 EP 0148051B1
Authority
EP
European Patent Office
Prior art keywords
conductors
lug
braids
slots
several
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.)
Expired
Application number
EP84402425A
Other languages
German (de)
French (fr)
Other versions
EP0148051A1 (en
Inventor
Jean-Paul Favre-Tissot
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.)
Merlin Gerin SA
Original Assignee
Merlin Gerin SA
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 Merlin Gerin SA filed Critical Merlin Gerin SA
Priority to AT84402425T priority Critical patent/ATE32290T1/en
Publication of EP0148051A1 publication Critical patent/EP0148051A1/en
Application granted granted Critical
Publication of EP0148051B1 publication Critical patent/EP0148051B1/en
Expired 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
    • H01R43/02—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for soldered or welded connections
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/14—Contacts characterised by the manner in which co-operating contacts engage by abutting
    • H01H1/22—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact
    • H01H1/221—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member
    • H01H1/226—Contacts characterised by the manner in which co-operating contacts engage by abutting with rigid pivoted member carrying the moving contact and a contact pressure spring acting between the pivoted member and a supporting member having a plurality of parallel contact bars
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/58—Electric connections to or between contacts; Terminals
    • H01H1/5822—Flexible connections between movable contact and terminal

Definitions

  • the invention relates to a method of fixed electrical connection of flexible conductors such as braids, of large cross section on the end of a current supply area of flattened cross section.
  • High current cut-off devices for example of a few thousand Amps, include flexible conductors, in this case shunts or braids, for connecting the mobile part, in particular mobile contact fingers and the current supply range.
  • the end of these flexible conductors is generally secured to the upper surface of the current supply range by welding or by tightening with bolts.
  • the method according to the present invention aims to allow a fixed connection of flexible conductors, in particular of braids, of large section, on a flattened area.
  • the method according to the invention is a method of fixed electrical connection of flexible conductors to a part by electrical welding by resistance of at least one conductor placed in a notch of said part, characterized in that the conductors are flexible conductors of high section, such as braids, intended to be fixed on the end of a current supply area of flattened section, several notches, the section of which corresponds to that of the associated conductor or conductors being provided in the edge of the end of the pad and separated laterally by teeth liable to deform, the ends of the conductors being introduced without play in the notches, then electrically welded by resistance to said pad, so that said teeth are deformed during welding and compress the ends of the conductors.
  • the conductors are flexible conductors of high section, such as braids, intended to be fixed on the end of a current supply area of flattened section, several notches, the section of which corresponds to that of the associated conductor or conductors being provided in the edge of the end of the pad and separated laterally by teeth liable
  • notches of greater or lesser depth it is possible to increase the fixing surface of the flexible conductors and to provide housings receiving ends of these flexible conductors, in particular braids. Subsequently, the flexible conductors will be called braids, other types of conductors can of course be used.
  • the electrical and mechanical connection of the braids to the pad is carried out in a high capacity welding press capable of deforming the teeth defined by the notches in order to compress and grip the ends of the braids in the notches and to perform welding without the addition of solder.
  • the absence of tin or another solder prevents the diffusion of tin in the braid and a stiffening of the latter.
  • the edge of the current supply range can be cut into slots over its entire width to define a series of notches, each of which receives the end or ends of one or more braids juxtaposed or superimposed in the notch.
  • the housing of the braids in the notches facilitates their positioning and allows the connection of all the braids to the current supply range by a single operation requiring no annealing. This crenellated cutting reduces the section of the projecting teeth which allows their deformation under the compression force exerted by the press and a compression of the ends of the braids engaged between the teeth.
  • the invention also relates to a device for electrical connection of a plurality of braids, in particular for connecting the contact fingers of an electrical switching device to a current supply range.
  • a device for electrical connection of a plurality of braids in particular for connecting the contact fingers of an electrical switching device to a current supply range.
  • connection braids which can be connected to one or more movable contact fingers, is fixed to the current supply range by housing, according to the present invention, the ends of these braids in notches formed in the end of the beach.
  • the notch connection according to the invention has made it possible to fix on a thin area 45 mm wide by 8 mm thick five braids each having a section of 40 mm square.
  • the braid section connected to the deck can also be increased by increasing the depth of the notches.
  • the braids extend at the exit of the notches in the extension of the range, or according to a preferred embodiment perpendicular to the range. When connecting a large number of braids on the same range, it is better to accommodate several braids in the same notch than to increase the number of notches by reducing the width of the teeth which could weaken the whole .
  • a movable contact 10 of a high current cut-off device for example of an electric circuit breaker of the type described in French patent No. 2,484,136, cooperates with a fixed contact 12. These contacts are connected respectively to a current supply range 14 and to starting range 16, the movable contact 10 can be moved to the open position to interrupt the current.
  • the movable contact 10 designed for nominal intensities of several thousand amperes consists of five fingers 18 mounted on the same axis 20 secured to a contact carrier (not shown) actuated by the circuit breaker mechanism. Each finger or contact 18 has lamellae 22, 24, the number of these lamellae obviously being able to be different.
  • the movable contact 10 is connected to the pad 14 by five braids 26, each associated with one of the contact fingers 18.
  • the end 28 of the braid 26 is engaged in a notch 30 formed in the rear part of the contact finger 18, the fixing being carried out by soldering with tin.
  • the opposite end 32 is connected to the current supply range 14 by pressure welding in notches 34, 36, 38.
  • the range 14 of a section of 8 x 45 mm has on the edge 40 three notches 34, 36, 38 in the form of notches crossing the entire height of the area 14.
  • the notches 34, 36, 38 in the form of slots are delimited by teeth 42, the end notches 34 , 38 each receiving two braids 26, while the notch in the middle 36 receives the end 32 of a single braid.
  • the width of the end notches 34, 38 is of course greater than that of the notch 36.
  • the braids are introduced into the notches 34, 36, 38 so as to extend perpendicular to the area 14, a different arrangement, in particular of alignment of the braid 26 with the pad 14, being conceivable.
  • FIGS. 3 and 4 which illustrate the method of welding the braids 26 to the pad 14, it can be seen that the latter is taken between the jaws 44 of a welding press, the notched part being projecting in look of the press's mobile electrode 46.
  • the braids 26 are placed in the notches 34, 36, 38, this positioning being effected by simple insertion of the ends 32 in the notches before the electric 46 is applied to the edge 40 of the track 14.
  • L electrode 46 covers the entire edge 40 and under the high pressure which can reach several thousand kilos and under the effect of electric heating, the intensity of the current being able to be several tens of thousands of amperes, the teeth 42 are crushed in compressing and welding the braids in the notches 34, 36, 38.
  • the welding is carried out by heating and compression without the addition of solder and without annealing.
  • the crushed or flared shape of the teeth 42 under the effect of the pressure is illustrated by FIGS. 4 and 5.
  • the ends 32 housed in the same notch 34, 38 can be juxtaposed as shown in the figures, or superimposed, the depth of the notch 34, 38 then being appropriate to the number of ends 32 superimposed. It is clear that the ends 32 housed in the same notch 34, 38 may belong to braids 26 connected to the same contact finger 18, which makes it possible to reduce the section of these braids 26, or that any other arrangement is conceivable.
  • the section of the notches 34, 36, 38 is adapted to that of the ends 32 so that the latter are accommodated without play in the notches before the welding operation.
  • the welding connection according to the invention does not increase the size of the connection pad 14 and it retains the flexibility of the braids 26 which makes it possible to limit their length.
  • the method according to the invention is particularly suitable for welding copper braids 26 on copper pads 14, but it is applicable to different materials for welding on aluminum pads. This method is particularly advantageous for fixing several braids 26 to the same area 14, but it would not go beyond the scope of the invention to apply it for fixing a single braid.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Breakers (AREA)
  • Switch Cases, Indication, And Locking (AREA)
  • Connections Effected By Soldering, Adhesion, Or Permanent Deformation (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Control Of El Displays (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Connections Arranged To Contact A Plurality Of Conductors (AREA)
  • Connections By Means Of Piercing Elements, Nuts, Or Screws (AREA)
  • Multi-Conductor Connections (AREA)

Abstract

Several braids (26) to connect a moving contact (10) to a lug (14) for the current lead are attached to the lug by welding under pressure, the ends (32) of the braids (26) being placed in slots (34, 36, 38) made in the face of the lug (14). The welding occurs without any need of hard solder.

Description

L'invention est relative à un procédé de connexion électrique fixe de conducteurs flexibles telles que des tresses, de forte section sur l'extrémité d'une plage d'amenée de courant de section aplatie.The invention relates to a method of fixed electrical connection of flexible conductors such as braids, of large cross section on the end of a current supply area of flattened cross section.

Les appareils de coupure de courant de forte intensité, par exemple de quelques milliers d'Ampères, comporte des conducteurs souples, en l'occurrence des shunts ou des tresses, de connexion de la partie mobile, en particulier des doigts de contact mobile et de la plage d'amenée de courant. L'extrémité de ces conducteurs souples est généralement solidarisée à la surface supérieure de la plage d'amenée de courant par soudage ou par serrage par des boulons. Ces modes de fixation donnent entière satisfaction pour des conducteurs de section limitée, mais sont difficilement applicables à des shunts ou tresses de forte section nécessaire au passage du courant dans les appareils précités.High current cut-off devices, for example of a few thousand Amps, include flexible conductors, in this case shunts or braids, for connecting the mobile part, in particular mobile contact fingers and the current supply range. The end of these flexible conductors is generally secured to the upper surface of the current supply range by welding or by tightening with bolts. These fixing methods are entirely satisfactory for conductors of limited section, but are difficult to apply to shunts or braids of large section necessary for the passage of current in the aforementioned devices.

On connaît déjà, notamment du document GB-A-985 597, un procédé de fixation d'un conducteur à un balai en forme de bloc, dont la section est notablement supérieure à celle du conducteur. L'extrémité du conducteur est introduite dans une rainure ménagée sur l'une des faces latérales du bloc et elle est soudée électriquement par résistance au bloc.There is already known, in particular from document GB-A-985 597, a method of fixing a conductor to a block-shaped brush, the cross section of which is notably greater than that of the conductor. The end of the conductor is introduced into a groove made on one of the side faces of the block and it is electrically welded by resistance to the block.

Le procédé selon la présente invention a pour but de permettre une connexion fixe de conducteurs souples, notamment de tresses, de forte section, sur une plage de forme aplatie.The method according to the present invention aims to allow a fixed connection of flexible conductors, in particular of braids, of large section, on a flattened area.

Le procédé selon l'invention est un procédé de connexion électrique fixe de conducteurs flexibles à une pièce par soudure électrique par résistance d'au moins un conducteur placé dans une encoche de ladite pièce, caractérisé en ce que les conducteurs sont des conducteur flexibles de forte section, tels que des tresses, destinés à être fixés sur l'extrémité d'une plage d'amenée de courant de section aplatie, plusieurs encoches, dont la section correspond à celle du ou des conducteurs associés étant ménagées dans la tranche de l'extrémité de la plage et séparées latéralement par des dents susceptibles de se déformer, les extrémités des conducteurs étant introduites sans jeu dans les encoches, puis soudées électriquement par résistance à ladite plage, de manière à ce que lesdites dents soient déformés lors de la soudure et compriment les extrémités des conducteurs.The method according to the invention is a method of fixed electrical connection of flexible conductors to a part by electrical welding by resistance of at least one conductor placed in a notch of said part, characterized in that the conductors are flexible conductors of high section, such as braids, intended to be fixed on the end of a current supply area of flattened section, several notches, the section of which corresponds to that of the associated conductor or conductors being provided in the edge of the end of the pad and separated laterally by teeth liable to deform, the ends of the conductors being introduced without play in the notches, then electrically welded by resistance to said pad, so that said teeth are deformed during welding and compress the ends of the conductors.

En pratiquant des encoches de profondeur plus ou moins grande, il est possible d'accroître la surface de fixation des conducteurs flexibles et de ménager des logements recevant des extrémités de ces conducteurs flexibles, notamment des tresses. Par la suite, les conducteurs flexibles seront dénommés tresses, d'autres types de conducteurs pouvant bien entendu être utilisés.By practicing notches of greater or lesser depth, it is possible to increase the fixing surface of the flexible conductors and to provide housings receiving ends of these flexible conductors, in particular braids. Subsequently, the flexible conductors will be called braids, other types of conductors can of course be used.

La liaison électrique et mécanique des tresses à la plage est réalisée dans une presse de soudage de forte capacité capable de déformer la denture définie par les encoches pour comprimer et enserrer les extrémités des tresses dans les encoches et de réaliser un soudage sans apport de brasure. L'absence d'étain ou d'une autre brasure évite la diffusion de l'étain dans la tresse et une rigidification de cette dernière. La tranche de la plage d'amenée de courant peut être découpée en créneaux sur toute sa largeur pour définir une série d'encoches dont chacune re- çoît l'extrémité ou les extrémités d'une ou de plusieurs tresses juxtaposées ou superposées dans l'encoche. Le logement des tresses dans les encoches facilite leur positionnement et permet la liaison de l'ensemble des tresses à la plage d'amenée de courant par une opération unique ne nécessitant aucun recuit. Cette découpe en créneaux réduit la section des dents en saillie ce qui permet leur déformation sous l'effort de compression exercé par la presse et une compression des extrémités des tresses engagées entre les dents.The electrical and mechanical connection of the braids to the pad is carried out in a high capacity welding press capable of deforming the teeth defined by the notches in order to compress and grip the ends of the braids in the notches and to perform welding without the addition of solder. The absence of tin or another solder prevents the diffusion of tin in the braid and a stiffening of the latter. The edge of the current supply range can be cut into slots over its entire width to define a series of notches, each of which receives the end or ends of one or more braids juxtaposed or superimposed in the notch. The housing of the braids in the notches facilitates their positioning and allows the connection of all the braids to the current supply range by a single operation requiring no annealing. This crenellated cutting reduces the section of the projecting teeth which allows their deformation under the compression force exerted by the press and a compression of the ends of the braids engaged between the teeth.

L'invention est également relative à un dispositif de connexion électrique d'une pluralité de tresses, notamment de liaison de doigts de contact d'un appareil de coupure électrique à une plage d'amenée de courant. Dans les appareils de forte intensité il est courant d'utiliser plusieurs tresses de connexion dont la rigidité est inférieure à celle d'une tresse unique de forte section. L'ensemble de ces tresses, qui peuvent être raccordées à un ou plusieurs doigts de contact mobile, est fixé à la plage d'amenée de courant en logeant selon la présente invention les extrémités de ces tresses dans des encoches ménagées dans l'extrémité de la plage. A titre indicatif on peut préciser que la liaison par encoche selon l'invention a permis de fixer sur une plage mince de 45 mm de largeur sur 8 mm d'épaisseur cinq tresses ayant chacune une section de 40 mm carré. La section de tresse raccordée à la plage peut d'ailleurs être augmentée en accroissant la profondeur des encoches.The invention also relates to a device for electrical connection of a plurality of braids, in particular for connecting the contact fingers of an electrical switching device to a current supply range. In high intensity devices it is common to use several connection braids whose rigidity is less than that of a single braid of large section. All of these braids, which can be connected to one or more movable contact fingers, is fixed to the current supply range by housing, according to the present invention, the ends of these braids in notches formed in the end of the beach. As an indication, it can be specified that the notch connection according to the invention has made it possible to fix on a thin area 45 mm wide by 8 mm thick five braids each having a section of 40 mm square. The braid section connected to the deck can also be increased by increasing the depth of the notches.

Les tresses s'étendent à la sortie des encoches dans le prolongement de la plage, ou selon un mode de mise en oeuvre préférentiel perpendiculairement à la plage. Lors d'une connexion d'un grand nombre de tresses sur une même plage, il est préférable de loger plusieurs tresses dans une même encoche que de multiplier le nombre des encoches en réduisant la largeur des dents ce qui risquerait d'affaiblir l'ensemble.The braids extend at the exit of the notches in the extension of the range, or according to a preferred embodiment perpendicular to the range. When connecting a large number of braids on the same range, it is better to accommodate several braids in the same notch than to increase the number of notches by reducing the width of the teeth which could weaken the whole .

D'autres avantages et caractéristiques ressortiront plus clairement de la description qui va suivre d'un mode de mise en oeuvre de l'invention, donné à titre d'exemple non limitatif et représenté aux dessins annexés, dans lesquels:

  • la figure 1 est une vue schématique en élévation d'un contact électrique ayant des tresses de liaison raccordées à une plage d'amenée de courant, selon l'invention;
  • la figure 2 est une vue en plan de la fig. 1;
  • la figure 3 illustre schématiquement la presse à souder de la plage selon la fig. 1, avant l'opération de soudage;
  • la figure 4 est une vue analogue à celle de la fig. 3, montrant l'ensemble après l'opération de soudage;
  • la figure 5 est une vue de côté de la plage de contact après l'opération de soudage.
Other advantages and characteristics will emerge more clearly from the description which follows of an embodiment of the invention, given by way of nonlimiting example and represented in the appended drawings, in which:
  • Figure 1 is a schematic elevational view of an electrical contact having connecting braids connected to a current supply range, according to the invention;
  • FIG. 2 is a plan view of FIG. 1;
  • FIG. 3 schematically illustrates the welding press of the range according to FIG. 1, before the welding operation;
  • Figure 4 is a view similar to that of FIG. 3, showing the assembly after the welding operation;
  • Figure 5 is a side view of the contact pad after the welding operation.

Sur les figures, un contact mobile 10 d'un appareil de coupure de courant de forte intensité, par exemple d'un disjoncteur électrique du type décrit dans le brevet français N° 2 484 136, coopère avec un contact fixe 12. Ces contacts sont reliés respectivement à une plage d'amenée de courant 14 et à plage de départ 16, le contact mobile 10 pouvant être déplacé en position d'ouverture pour interrompre le courant. Le contact mobile 10 conçu pour des intensités nominales de plusieurs milliers d'Ampères est constitué par cinq doigts 18 montés sur un même axe 20 solidaire d'un porte-contacts (non représenté) actionné par le mécanisme du disjonteur. Chaque doigt ou contact 18 comporte des lamelles 22, 24, le nombre de ces lamelles pouvant bien entendu être différent. Le contact mobile 10 est relié à la plage 14 par cinq tresses 26, chacune associée à l'un des doigts de contact 18. L'extrémité 28 de la tresse 26 est engagée dans une entaille 30 pratiquée à la partie postérieure du doigt de contact 18, la fixation étant réalisée par une soudure à l'étain. L'extrémité opposée 32 est raccordée à la plage d'amenée de courant 14 par soudage sous pression dans des encoches 34, 36, 38. Dans l'exemple illustré par les figures, la plage 14 d'une section de 8 x 45 mm présente sur la tranche 40 trois encoches 34, 36, 38 en forme d'entailles traversant toute la hauteur de la plage 14. Les encoches 34, 36, 38 en forme de créneaux sont délimitées par des dents 42, les encoches d'extrémités 34,38 recevant chacune deux tresses 26, tandis que l'encoche du milieu 36 reçoit l'extrémité 32 d'une seule tresse. La largeur des encoches d'extrémités 34, 38 est bien entendu supérieure à celle de l'encoche 36. Les tresses sont introduites dans les encoches 34,36, 38 de manière à s'étendre perpendiculairement à la plage 14, une disposition différente, notamment d'alignement de la tresse 26 avec la plage 14, étant concevable.In the figures, a movable contact 10 of a high current cut-off device, for example of an electric circuit breaker of the type described in French patent No. 2,484,136, cooperates with a fixed contact 12. These contacts are connected respectively to a current supply range 14 and to starting range 16, the movable contact 10 can be moved to the open position to interrupt the current. The movable contact 10 designed for nominal intensities of several thousand amperes consists of five fingers 18 mounted on the same axis 20 secured to a contact carrier (not shown) actuated by the circuit breaker mechanism. Each finger or contact 18 has lamellae 22, 24, the number of these lamellae obviously being able to be different. The movable contact 10 is connected to the pad 14 by five braids 26, each associated with one of the contact fingers 18. The end 28 of the braid 26 is engaged in a notch 30 formed in the rear part of the contact finger 18, the fixing being carried out by soldering with tin. The opposite end 32 is connected to the current supply range 14 by pressure welding in notches 34, 36, 38. In the example illustrated by the figures, the range 14 of a section of 8 x 45 mm has on the edge 40 three notches 34, 36, 38 in the form of notches crossing the entire height of the area 14. The notches 34, 36, 38 in the form of slots are delimited by teeth 42, the end notches 34 , 38 each receiving two braids 26, while the notch in the middle 36 receives the end 32 of a single braid. The width of the end notches 34, 38 is of course greater than that of the notch 36. The braids are introduced into the notches 34, 36, 38 so as to extend perpendicular to the area 14, a different arrangement, in particular of alignment of the braid 26 with the pad 14, being conceivable.

En se référant plus particulièrement aux figures 3 et 4, qui illustrent le procédé de soudage des tresses 26 à la plage 14, on voit que cette dernière est prise entre les mâchoires 44 d'une presse à souder, la partie encochée étant en saillie en regard de l'électrode mobile 46 de la presse. Les tresses 26 sont mises en place dans les encoches 34, 36, 38, cette mise en place s'effectuant par simple insertion des extrémités 32 dans les encoches avant que l'électrique 46 soit appliquée sur la tranche 40 de la plage 14. L'électrode 46 coiffe toute la tranche 40 et sous la forte pression pouvant atteindre plusieurs milliers de kilos et sous l'effet de chauffage électrique, l'intensité du courant pouvant être de plusieurs dizaines de milliers d'Ampères, les dents 42 sont écrasées en comprimant et en soudant les tresses dans les encoches 34, 36, 38. Le soudage s'effectue par chauffage et compression sans apport de brasure et sans recuit. La forme écrasée ou évasée des dents 42 sous l'effet de la pression est illustrée par les figures 4 et 5. La fixation de l'ensemble des tresses 26 et réalisée par une opération unique sans nécessiter des accessoires de maintien ou de positionnement des tresses 26. Les extrémités 32 logées dans une même encoche 34, 38 peuvent être juxtaposées de la manière représentée sur les figures, ou superposées, la profondeur de l'encoche 34, 38 étant alors appropriée au nombre d'extrémités 32 superposées. Il est clair que les extrémités 32 logées dans une même encoche 34, 38 peuvent appartenir à des tresses 26 raccordées à un même doigt de contact 18, ce qui permet de réduire la section de ces tresses 26, ou que toute autre dis- positon est concevable. La section des encoches 34, 36, 38 est adaptée à celle des extrémités 32 da façon à ce que ces dernières viennent se loger sans jeu dans les encoches avant l'opération de soudage. Le raccordement par soudage selon l'invention, n'augmente pas l'encombrememt de la plage de raccordement 14 et il conserve la souplesse des tresses 26 ce qui permet de limiter leur longueur. Le procédé selon l'invention est particulièrement approprié au soudage des tresses en cuivre 26 sur des plages 14 en cuivre, mais il est applicable à des matériaux différents de soudage sur des plages en aluminium. Ce procédé est particulièrement intéressant pour la fixation de plusieurs tresses 26 a une même plage 14, mais on ne sortirait pas du cadre de l'invention en l'appliquant pour une fixation d'une tresse unique.Referring more particularly to FIGS. 3 and 4, which illustrate the method of welding the braids 26 to the pad 14, it can be seen that the latter is taken between the jaws 44 of a welding press, the notched part being projecting in look of the press's mobile electrode 46. The braids 26 are placed in the notches 34, 36, 38, this positioning being effected by simple insertion of the ends 32 in the notches before the electric 46 is applied to the edge 40 of the track 14. L electrode 46 covers the entire edge 40 and under the high pressure which can reach several thousand kilos and under the effect of electric heating, the intensity of the current being able to be several tens of thousands of amperes, the teeth 42 are crushed in compressing and welding the braids in the notches 34, 36, 38. The welding is carried out by heating and compression without the addition of solder and without annealing. The crushed or flared shape of the teeth 42 under the effect of the pressure is illustrated by FIGS. 4 and 5. The fixing of the set of braids 26 and carried out by a single operation without requiring accessories for holding or positioning the braids 26. The ends 32 housed in the same notch 34, 38 can be juxtaposed as shown in the figures, or superimposed, the depth of the notch 34, 38 then being appropriate to the number of ends 32 superimposed. It is clear that the ends 32 housed in the same notch 34, 38 may belong to braids 26 connected to the same contact finger 18, which makes it possible to reduce the section of these braids 26, or that any other arrangement is conceivable. The section of the notches 34, 36, 38 is adapted to that of the ends 32 so that the latter are accommodated without play in the notches before the welding operation. The welding connection according to the invention does not increase the size of the connection pad 14 and it retains the flexibility of the braids 26 which makes it possible to limit their length. The method according to the invention is particularly suitable for welding copper braids 26 on copper pads 14, but it is applicable to different materials for welding on aluminum pads. This method is particularly advantageous for fixing several braids 26 to the same area 14, but it would not go beyond the scope of the invention to apply it for fixing a single braid.

Il est inutile de décrire plus en détail la presse à souder qui est d'un type classique ou le procédé qui se résume à la mise en place de la plage 14 entre les mors 44 de la presse, les tresses 26 étant insérées dans les encoches 34, 36, 38 et à l'application de l'électrode mobile 46 sur la tranche 40 sous forte pression pour un soudage par résistance de la manière usuelle.It is unnecessary to describe in more detail the welding press which is of a conventional type or the process which boils down to the placement of the pad 14 between the jaws 44 of the press, the braids 26 being inserted in the notches 34, 36, 38 and to the application of the movable electrode 46 on the wafer 40 under high pressure for resistance welding in the usual manner.

Claims (9)

1. Method of fixed electric connection of flexible conductors to a piece by electrical soldering by resistance of at least one conductor arranged in a slot of said piece, characterized in that the conductors (26) are flexible conductors of high section, such as braids, intended to be secured on the end of a flat section lug (14) for the current leading, several slots (34, 36, 38), the section of which corresponds to the one of the associated conductor or conductors (26), being arranged in the face of the end of the lug and being separated laterally by teeth (42) which can be distorted, the ends of the conductors being introduced in the slots without any play and then soldered electrically by resistance to said lug, so as to distort said teeth during soldering and to compress the ends of the conductors.
2. Method according to claim 1, characterized in that a set of slots (34, 36, 38) are made along said face (40) to form a comb, between the teeth (42) of which are inserted the flexible conductors (26) to connect, said comb lined by conductors being placed in a press (44, 46) and heated to realize the attachment of all said flexible conductors in a single operation.
3. Method according to claim 1 or 2, characterized in that the rectangle shaped slots (34, 36, 38) are through and through crossing the thickness of said lug (14) by being opened on three sides, under the circumstances the large upper and bottom sides and the front side of the lug, and that the flexible conductors (26) are introduced in the slots, so as to extend perpendicular to said large sides.
4. Method according to claim 1, 2 or 3, characterized in that the braids (26) and the lug (14) are made of copper and that the soldering is made without any need of hard solder.
5. Method according to claim 4, characterized in that the welding pressure is of several thousand kilograms per square centimeters and the intensity of the welding current of several tens of thousands amperes.
6. Electric connection device of flexible conductors to a piece comprising at least one slot for the housing of the end of a conductor which is soldered electrically by resistance to said piece, characterized in that the conductors (26) are flexible conductors of high section, such as braids, said piece being constituted by a flat section lug (14) for the current leading, several slots (34, 36, 38), the section of which corresponds to the one of the associated conductor or conductors (26), being arranged in the face (40) of the end of the lug and being separated laterally by teeth (42) which can be distorted, the ends of the conductors being introduced in the slots without any play and then soldered electrically by resistance to said lug, so as to distort said teeth which compress the ends of the conductors.
7. Connection device according to claim 6, of link braids (26) of a lug (14) for the current leading to several fingers (18) of a moving contact (10) of an electric circuit breaker, characterized in that several braids (26) secured to one or several fingers (18) are placed in a same slot (34, 38).
8. Connection device according to claim 7, characterized in that the ends (32) of the braids (26) put in a same slot (34, 38) are superimposed and/or juxtaposed in said slot.
9. Connection device according to claim 6, 7 or 8, characterized in that the braids (26) extend perpendicular to the lug (14) at the output of the slots (34, 36, 38) to fit together in loop with the contact fingers (18) slightly aligned with the lug (14).
EP84402425A 1983-12-13 1984-11-28 Method and device for the fixed electrical connection of braided conductors to current supply surfaces Expired EP0148051B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84402425T ATE32290T1 (en) 1983-12-13 1984-11-28 METHOD AND DEVICE FOR PERMANENT ELECTRICAL CONNECTION OF WIRES ON POWER SUPPLY SURFACES.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8320089 1983-12-13
FR8320089A FR2556515B1 (en) 1983-12-13 1983-12-13 METHOD AND DEVICE FOR FIXED ELECTRICAL CONNECTION OF BRAIDS ON CURRENT SUPPLY RANGES

Publications (2)

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EP0148051A1 EP0148051A1 (en) 1985-07-10
EP0148051B1 true EP0148051B1 (en) 1988-01-27

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EP84402425A Expired EP0148051B1 (en) 1983-12-13 1984-11-28 Method and device for the fixed electrical connection of braided conductors to current supply surfaces

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US (1) US4583065A (en)
EP (1) EP0148051B1 (en)
JP (1) JPS60140623A (en)
AT (1) ATE32290T1 (en)
AU (1) AU567469B2 (en)
CA (1) CA1234857A (en)
DE (1) DE3469118D1 (en)
ES (2) ES8607635A1 (en)
FR (1) FR2556515B1 (en)
ZA (1) ZA849618B (en)

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FR2676674B1 (en) * 1991-05-21 1995-05-12 Merlin Gerin METHOD OF ASSEMBLING BY WELDING TWO MASSIVE COPPER PARTS AND ASSEMBLING CARRIED OUT BY SUCH A PROCESS.
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Also Published As

Publication number Publication date
ES538262A0 (en) 1986-06-01
ATE32290T1 (en) 1988-02-15
US4583065A (en) 1986-04-15
AU3657484A (en) 1985-06-20
AU567469B2 (en) 1987-11-19
ES8607635A1 (en) 1986-06-01
ES296509U (en) 1987-10-16
ZA849618B (en) 1985-07-31
FR2556515A1 (en) 1985-06-14
FR2556515B1 (en) 1987-01-16
ES296509Y (en) 1988-04-16
JPS60140623A (en) 1985-07-25
DE3469118D1 (en) 1988-03-03
EP0148051A1 (en) 1985-07-10
CA1234857A (en) 1988-04-05

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