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WO1996002926A1 - Electrode pour soudage par resistance d'elements de contact electriques sur un support - Google Patents

Electrode pour soudage par resistance d'elements de contact electriques sur un support Download PDF

Info

Publication number
WO1996002926A1
WO1996002926A1 PCT/DE1995/000868 DE9500868W WO9602926A1 WO 1996002926 A1 WO1996002926 A1 WO 1996002926A1 DE 9500868 W DE9500868 W DE 9500868W WO 9602926 A1 WO9602926 A1 WO 9602926A1
Authority
WO
WIPO (PCT)
Prior art keywords
electrode
contact
carrier
contact piece
legs
Prior art date
Application number
PCT/DE1995/000868
Other languages
German (de)
English (en)
Inventor
Heinz Ludwig
Heinz Stadler
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO1996002926A1 publication Critical patent/WO1996002926A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H11/00—Apparatus or processes specially adapted for the manufacture of electric switches
    • H01H11/04—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts
    • H01H11/041—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by bonding of a contact marking face to a contact body portion
    • H01H11/043—Apparatus or processes specially adapted for the manufacture of electric switches of switch contacts by bonding of a contact marking face to a contact body portion by resistance welding

Definitions

  • the invention relates to an electrode for resistance welding electrical contact pieces on a carrier with an end face at least partially adapted to the contact surface of the contact piece for pressing and contacting the contact piece against the carrier surface.
  • the electrode can then only have a relatively small cross-section, so that it is heated relatively strongly when the welding current is high.
  • it must therefore consist of a material of high conductivity, such as copper, which in turn burns and wears out relatively quickly.
  • DE 24 54 804 B2 also discloses a device for resistance welding contact metal blanks, in which the electrode removes the contact blank from a guide and pushes it into its welding position.
  • the electrode has a recess which is open towards the front, ie towards the carrier, and towards one side, namely towards the guide channel for the blanks, so that it moves the contact metal blank to be advanced laterally and from behind ⁇ holds while one side remains open.
  • a fixed guide wall up to the contact carrier must therefore be provided on this open side and extend to the intended welding point.
  • the use of an already overmolded carrier is not possible or is possible only to a limited extent.
  • the guidance of the isolated contact pieces still requires a considerable amount of stationary guide elements.
  • the aim of the present invention is to provide an electrode which allows a contact piece to be brought into the intended position on the carrier without any other guide elements and also makes it possible to weld contact pieces onto a carrier which has already been overmolded with plastic.
  • this aim is achieved with an electrode which has clamping jaws projecting beyond the end face on both sides and which are able to hold the contact piece in place with a clamping force acting between them.
  • the inventive design of the electrode as a clamping device means that additional, in particular stationary, guide elements for the contact piece are not required, so that the overall structure of the welding device becomes simpler and the space required in the area of the welding point on the carrier surface is very small.
  • the clamping jaws provided on the electrode require only a small cross-section beyond the width of the contact piece, so that the wider circumference around the contact piece as well as the entire rest of the carrier element are shaped in any way before the contact piece is welded on and are also molded into plastic. can be splashed.
  • the electrode according to the invention is split in a fork shape into two elastically spreadable legs, part of the face contact surface being formed on each of the clamping jaws.
  • a region of the end contact surface opposite the central part of the contact surface of the contact piece is expediently left free on both electrode legs. In this way it is ensured that the surface layer later serving as the actual contact area is not adversely affected by the welding process.
  • the electrode with the end contact surface and one of the clamping jaws can be rigid, while a second clamping jaw can be pressed against the first with force.
  • This second clamping jaw can either be elastically or elastically connected to the electrode; however, it is also conceivable to connect it to the electrode via a type of joint and to exert the pressure force by means of a laterally acting actuating element.
  • FIG. 1 shows a schematic welding arrangement for welding contact pieces in a relay base
  • FIG. 1 Figure 2 to 4 different schematically shown electrode shapes in plan view.
  • FIG. 1 shows a section of a largely free-punched, vertical contact carrier board 3, which is guided past a welding device 4 by transport and holding devices (not shown).
  • Contact carriers 31 are punched out of this board 3; they are only held together by conveyor belts 32 at the top and bottom.
  • the contact carriers 31 each intended for a relay are extrusion-coated with plastic to form a respective relay base 33, with small contact areas 34 being exposed in the interior of the base, onto which profile contact pieces 21 are to be welded.
  • a rear electrode 43 is arranged in the area of the circuit board 3 so that it contacts the contact elements 31 and the contact areas 34 on the rear side of the relay base 33, respectively.
  • the front electrode is split into two resilient legs 53 in the form of a tuning fork.
  • the free ends form clamping jaws 54 which encompass the contact piece 21 from both sides and also contact in side areas of the contact surface, but not in the middle. This ensures that the subsequent working area of the contact layer is not adversely affected by the welding.
  • the contact piece 21 is clamped between the clamping jaws 54 before or after the separation of a contact strip, the resilient legs 53 opening slightly. With the end faces 55, the contact piece 21 is then pressed onto the support 31 and welded.
  • the contact piece 21 can be brought to its welding position in a defined manner with the aid of the front electrode 52, with only very little space being required for the clamping jaws 54 around this welding position. In addition, there is no need for any fixed guides for the contact pieces 21, so that welding can also easily be carried out in small recessed areas of a contact carrier overmolded with plastic.
  • the fork end of the front electrode can be opened against the bias by an additional device.
  • FIG. 3 The front electrode 62 shown there, in turn, has resilient legs 63 with clamping jaws 64 formed at the ends ⁇ Slidable wedge 65 is provided, which presses the two spring legs 63 apart by a correspondingly controlled movement towards the clamping jaws 64 and thus releases the clamping.
  • the guidance and control of the wedge 66 can be constructed in a suitable manner by a person skilled in the art.
  • a front electrode 72 such that it forms only one clamping jaw 73 and thus the contact piece from two surfaces, namely from one side with the clamping jaw 73 and on areas of the contact surface End faces 75, touched.
  • a second jaw 74 can then be placed on suitable ones Be connected to the electrode 72 and be applied with a suitable force F from the opposite side for clamping the contact piece 21.
  • This force can be generated either by a resilient attachment of the clamping jaw 74 to the electrode 72 or by a corresponding actuation mechanism.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Resistance Welding (AREA)

Abstract

L'invention concerne une électrode présentant une surface frontale (55) adaptée au moins en partie à la surface de contact de l'élément de contact (21) à souder, cette surface frontale étant conçue pour exercer une pression et établir un contact. L'électrode comporte en outre des mâchoires de serrage (54) dépassant des deux côtés de la surface frontale, ces mâchoires permettant de maintenir l'élément de contact grâce à leur force de serrage. Ceci permet d'éviter d'utiliser des dispositifs de guidage supplémentaires pour l'élément de contact. L'électrode permet de placer cet élément de contact sur une zone étroite du support où il est ensuite soudé. Le support de contact peut donc être déjà enrobé de plastique avant le soudage de l'élément de contact.
PCT/DE1995/000868 1994-07-19 1995-07-04 Electrode pour soudage par resistance d'elements de contact electriques sur un support WO1996002926A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4425533 1994-07-19
DEP4425533.0 1994-07-19

Publications (1)

Publication Number Publication Date
WO1996002926A1 true WO1996002926A1 (fr) 1996-02-01

Family

ID=6523581

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1995/000868 WO1996002926A1 (fr) 1994-07-19 1995-07-04 Electrode pour soudage par resistance d'elements de contact electriques sur un support

Country Status (1)

Country Link
WO (1) WO1996002926A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19523777A1 (de) * 1994-07-19 1996-01-25 Siemens Ag Verfahren und Vorrichtung zum Aufschweißen von Profil-Kontaktstücken auf einen Träger

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE951328C (de) * 1953-04-07 1956-10-25 Western Electric Co Widerstandsschweissvorrichtung zum Anschweissen von Kontaktplaettchen
EP0371363A1 (fr) * 1988-12-01 1990-06-06 Siemens Aktiengesellschaft Procédé et dispositif pour poser des pièces de contact sur des supports de contact

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE951328C (de) * 1953-04-07 1956-10-25 Western Electric Co Widerstandsschweissvorrichtung zum Anschweissen von Kontaktplaettchen
EP0371363A1 (fr) * 1988-12-01 1990-06-06 Siemens Aktiengesellschaft Procédé et dispositif pour poser des pièces de contact sur des supports de contact

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19523777A1 (de) * 1994-07-19 1996-01-25 Siemens Ag Verfahren und Vorrichtung zum Aufschweißen von Profil-Kontaktstücken auf einen Träger
DE19523777C2 (de) * 1994-07-19 1998-07-09 Siemens Ag Verfahren und Vorrichtung zum Aufschweißen von Profil-Kontaktstücken auf einen Träger

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