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EP0161487A2 - Method of automatic resistance welding of electric contact plates onto a supporting belt and semifinished products for the fabrication of contacts of hard and brittle contact material to be welded onto a supporting belt - Google Patents

Method of automatic resistance welding of electric contact plates onto a supporting belt and semifinished products for the fabrication of contacts of hard and brittle contact material to be welded onto a supporting belt Download PDF

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Publication number
EP0161487A2
EP0161487A2 EP85104358A EP85104358A EP0161487A2 EP 0161487 A2 EP0161487 A2 EP 0161487A2 EP 85104358 A EP85104358 A EP 85104358A EP 85104358 A EP85104358 A EP 85104358A EP 0161487 A2 EP0161487 A2 EP 0161487A2
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EP
European Patent Office
Prior art keywords
contact
contact material
slots
welding
hard
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP85104358A
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German (de)
French (fr)
Other versions
EP0161487A3 (en
Inventor
Heinz Koch
Herbert Tybussek
Heinrich Wolf
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.)
WC Heraus GmbH and Co KG
Original Assignee
WC Heraus GmbH and Co KG
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 WC Heraus GmbH and Co KG filed Critical WC Heraus GmbH and Co KG
Publication of EP0161487A2 publication Critical patent/EP0161487A2/en
Publication of EP0161487A3 publication Critical patent/EP0161487A3/en
Withdrawn legal-status Critical Current

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    • 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 a method for the automatic resistance welding of metal plates forming electrical contacts according to the preamble of claim 1 and a semi-finished product for the production of contacts welded onto a carrier tape, which is particularly suitable for the automated production of welded contacts, according to the preamble of claim 5 .
  • a machine for automatic resistance welding of electrical Kon + ak + e biloand metal plates to predetermined locations on a carrier tape is known from DE-PS 26 42 040. This is a high-performance machine with which up to 600 welds per minute can be carried out. Such machines, which have proven themselves in practice, could practically be run with a work cycle sequence that reaches the limit of the possible welding frequency. So far, such automats have made contact plates made of soft and non-brittle contact materials based on precious or non-precious metals, which can easily be separated from a corresponding band or stamp
  • the present invention is based on the object of specifying a method for the automated welding of hard and brittle contact materials, such as molybdenum and in particular tungsten or their alloys with a high proportion of their own, onto a carrier tape, as well as a semi-finished product made of such contact materials which is suitable for automated welding.
  • hard and brittle contact materials such as molybdenum and in particular tungsten or their alloys with a high proportion of their own
  • Tungsten is a very hard and brittle contact material that has the highest melting point of all contact materials and has the highest electrical wear resistance. It is manufactured using a metallurgical process. Since then, individually manufactured tungsten contact plates have been riveted onto a carrier tape or screwed onto a base. Such contacts are used for interrupter contacts with a high switching frequency and highest erosion resistance, and as pre-contacts.
  • Molybdenum has similar properties to tungsten, but is less hard and brittle and is therefore somewhat easier to process than tungsten.
  • the individual contact plates to be welded onto the carrier strip can be separated with a separating stamp through the slots provided at the spacing of the contact dimension on the tungsten top opposite the welding side. without this separation process leading to cracks and other damage in the tungsten contact plate.
  • the slots are advantageously made at a depth corresponding to one third of the thickness of the contact material layer or a semi-finished product is provided with a corresponding slot depth, a slot depth of two thirds of the thickness of the contact material layer having proven particularly advantageous.
  • the contact material strips or rods should expediently be slotted with a slot width of approximately 0.1 mm.
  • the device shown in FIG. 1 for automatic resistance welding of metal plates forming electrical contacts to predetermined locations on a carrier tape has a welding device 1 with a table 2.
  • the welding device 1 is supplied with a carrier tape 4 stored on a reel 3 and with contact material 6 stored in the form of a tape on a further reel 5.
  • the individual contact plates are separated from the contact material 6 by a separating stamp (not shown) and over the working drum 7 to the carrier tape 4, where they are then welded by means of electrodes 8.
  • the carrier tape 4 with the contact plates 9 welded thereon is stored on a third reel 10.
  • the contact material 6 fed to the welding device 1 is a tungsten strip or stored tungsten rods with a thin solder layer 11 on its welding side, as can be seen from FIG. 2.
  • This tungsten strip or these tungsten rods which have already been provided with slots at a distance corresponding to the desired contact lengths 14 in a separate working step, are in a separating device 12, which is arranged in the welding device 1 in front of the working drum 7, severed.
  • the contact width 15 is determined by the width of the tungsten strip or rod designated by the reference number 16 in FIG.
  • the slots 13, which have a width (reference number 17) of 0.1 mm, can be made in a slot device by means of a saw blade or also by a laser.
  • the slots 13 are designed in such a way that webs 18 made of the tungsten contact material remain between the individual contact plates 9.
  • the individual contact plates can be easily separated or broken off in the welding device 1 by the separating stamp in that the slots 12 are provided, without the contact plate itself being damaged by tearing of the hard and brittle contact material.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Manufacture Of Switches (AREA)
  • Resistance Welding (AREA)
  • Manufacturing Of Electrical Connectors (AREA)

Abstract

Methods for the automatic resistance welding of metal plates forming electric contacts to predetermined locations and semifinished products for the fabrication of contacts welded on a backing strip are known. A method for the automatic resistance welding of contact plates of a hard and brittle contact material, such as molybdenum and in particular tungsten, is specified in which a solder layer is applied to the welding side of a contact-material strip or bar of molybdenum or tungsten and in which, at the spacing between the contact dimensions, slits are made on the contact-material surface remote from the welding side, the contact plates being detached at these slit-like separating points. A corresponding semifinished product is a contact- material strip or bar of molybdenum or in particular tungsten or their base alloys which has a solder layer on the side to be welded on.

Description

Die Erfindung betrifft ein Verfahren zum automatischen Widerstandsschweißen von elektrische Kontakte bildenden Metallplättchen gemäß dem Oberbegriff des Anspruchs 1 sowie ein Halbzeug für die Herstellung von auf einem Träqerband aufgeschweißten Kontakten, das sich insbesondere für die automatisierte Herstellung von aufgeschweißten Kontakten eignet, gemäß dem Oberbegriff des Anspruchs 5.The invention relates to a method for the automatic resistance welding of metal plates forming electrical contacts according to the preamble of claim 1 and a semi-finished product for the production of contacts welded onto a carrier tape, which is particularly suitable for the automated production of welded contacts, according to the preamble of claim 5 .

Eine Maschine zum automatischen Widerstandsschweißen von elektrische Kon+ak+e biloanden Metallplättchen auf vorbestimmte Stellen eines Trägerbandes ist aus der DE-PS 26 42 040 bekannt. Hierbei handelt es sich um einen Hochleistungsautomaten, mit dem bis zu 600 Aufschweißungen pro Minute durchgeführt werden können. Derartige Automaten, die sich in der Praxis gut bewährt haben, könnten praktisch mit einer Arbeitstaktfolge gefahren werden, die an die Grenze der möglichen Schweißfrequenz heranreicht. Bisher wurden mit solchen Automaten Kontaktplättchen aus weichen und nichtspröden Kontaktwerkstoffen auf Edel- oder Unedelmetallbasis, die sich leicht durch den Trennstempel von einem entsprechenden Band oderA machine for automatic resistance welding of electrical Kon + ak + e biloand metal plates to predetermined locations on a carrier tape is known from DE-PS 26 42 040. This is a high-performance machine with which up to 600 welds per minute can be carried out. Such machines, which have proven themselves in practice, could practically be run with a work cycle sequence that reaches the limit of the possible welding frequency. So far, such automats have made contact plates made of soft and non-brittle contact materials based on precious or non-precious metals, which can easily be separated from a corresponding band or stamp

Stab abtrennen lassen, auf Trägerbänder aufgeschweißt.Have the rod cut off, welded onto carrier tapes.

Der vorliegenden Erfindung liegt nun die Aufgabe zugrunde, ein Verfahren zum automatisierten Aufschweißen von harten und spröden Kontaktwerkstoffen, wie Molybdän und insbesondere Wolfram oder deren Legierungen mit einem hohen Eigenanteil auf ein Trägerband, sowie ein für das automatisierte Aufschweißen geeignetes Halbzeug aus solchen Kontaktwerkstoffen anzugeben.The present invention is based on the object of specifying a method for the automated welding of hard and brittle contact materials, such as molybdenum and in particular tungsten or their alloys with a high proportion of their own, onto a carrier tape, as well as a semi-finished product made of such contact materials which is suitable for automated welding.

Diese Aufgabe wird erfindungsgemäß hinsichtlich des Verfahrens durch die kennzeichnenden Merkmale des Anspruchs 1 und hinsichtlich eines Halbzeugs gemäß den kennzeichnenden Merkmalen des Anspruchs 5 gelöst. Es ist nunmehr möglich, Kontaktplättchen aus Wolfram oder Molybdän oder aus einen hohen Anteil an Wolfram und Molybdän enthaltenden Kontaktwerkstoffen mit einer hohen Arbeitstaktfolge auf ein Trägerband aufzuschweißen.This object is achieved with respect to the method by the characterizing features of claim 1 and with regard to a semi-finished product according to the characterizing features of claim 5. It is now possible to weld contact plates made of tungsten or molybdenum or from contact materials containing a high proportion of tungsten and molybdenum onto a carrier tape with a high work cycle sequence.

Wolfram ist ein sehr harter und spröder Kontaktwerkstoff, der unter allen Kontaktwerkstoffen den höchsten Schmelzpunkt aufweist und die höchste elektrische Verschleißfestigkeit besitzt. Seine Herstellung erfolgt auf metallurgischem Wege. Seither wurden bei der Kontaktfertigung einzeln hergestellte Wolfram-Kontaktplättchen auf ein Trägerband aufgenietet oder auf einen Sockel aufgeschraubt. Derartige Kontakte finden Verwendung für Unterbrecherkontakte hoher Schaltfrequenz und höchster Abbrandfestigkeit sowie als Vorkontakte.Tungsten is a very hard and brittle contact material that has the highest melting point of all contact materials and has the highest electrical wear resistance. It is manufactured using a metallurgical process. Since then, individually manufactured tungsten contact plates have been riveted onto a carrier tape or screwed onto a base. Such contacts are used for interrupter contacts with a high switching frequency and highest erosion resistance, and as pre-contacts.

Molybdän weist ähnliche Eigenschaften wie Wolfram auf, ist aber weniger hart und spröde und läßt sich deshalb etwas leichter bearbeiten als Wolfram.Molybdenum has similar properties to tungsten, but is less hard and brittle and is therefore somewhat easier to process than tungsten.

Von einem Kontaktwerkstoff-Band oder Stab, beispielsweise aus dem sehr harten und spröden Wolfram in reiner Form, lassen sich durch die im Abstand der Kontaktabmessung auf der der Schweißseite entgegengesetzten Wolfram-Oberseite vorgesehenen Schlitze die einzelnen auf das Trägerband aufzuschweißenden Kontaktplättchen mit einem Trennstempel abtrennen, ohne daß dieser Trennvorgang zu Rissen und anderen Schäden in dem Wolfram-Kontaktplättehen führt. Durch diese automatisierte Herstellung von solchen Kontakten lassen sich die Herstellungskosten enorm herabsetzten.From a contact material strip or rod, for example from the very hard and brittle tungsten in pure form, the individual contact plates to be welded onto the carrier strip can be separated with a separating stamp through the slots provided at the spacing of the contact dimension on the tungsten top opposite the welding side. without this separation process leading to cracks and other damage in the tungsten contact plate. Through this automated The production of such contacts can reduce the manufacturing costs enormously.

In vorteilhafterweise werden die Schlitze in einer einem Drittel der Dicke der Kontaktwerkstoffschicht entsprechenden Tiefe ausgeführt bzw. ein Halbzeug mit einer entsprechenden Schlitztiefe bereitgestellt, wobei sich besonders vorteilhaft eine Schlitztiefe von zwei Drittel der Dicke der Kontaktwerkstoffschicht erwiesen hat. Zweckmäßigerweise sollten die Kontaktwerkstoff-Bänder oder Stäbe mit einer Schlitzbreite von etwa, 0,1 mm geschlitzt werden.The slots are advantageously made at a depth corresponding to one third of the thickness of the contact material layer or a semi-finished product is provided with a corresponding slot depth, a slot depth of two thirds of the thickness of the contact material layer having proven particularly advantageous. The contact material strips or rods should expediently be slotted with a slot width of approximately 0.1 mm.

Weitere vorteilhafte Einzelheiten und Merkmale der Erfindung ergeben sich auf der nachfolgenden Beschreibung eines Ausführungsbeispiels anhand der Zeichnung.Further advantageous details and features of the invention emerge from the following description of an exemplary embodiment with reference to the drawing.

In der Zeichnung zeigt:

  • Figur 1 eine Maschine zum automatischew Widerstandschveißen von elektrische Kontakte bildenden Metallplättchen auf vorbestimmte Stellen eines Trägerbandes,
  • . Figur 2 ein gemäß der Erfindung vorbereitetes Band aus einem spröden und harten Kontaktwerksotff und
  • Figur 3 einen Träger mit aufgeschweißtem Kontakt.
The drawing shows:
  • 1 shows a machine for automatic resistance welding of metal plates forming electrical contacts to predetermined positions on a carrier tape,
  • . Figure 2 is a tape prepared according to the invention from a brittle and hard Kontaktwerkotff and
  • Figure 3 shows a carrier with welded contact.

Die aus Figur 1 ersichtliche Vorrichtung zum automatischen Widerstandsschweißen von elektrische Kontakte bildenden Metallplättchen auf vorbestimmte Stellen eines Trägerbandes weist eine Schweißvorrichtung 1 mit einem Tisch 2 auf. Der Schweißvorrichtung 1 wird auf einer Haspel 3 bevorratetes Trägerband 4 sowie auf einer weiteren Haspel 5 bevorratetes Kontaktmaterial 6 in Form eines Bandes zugeführt. Von dem Kontaktmaterial 6 werden die einzelnen I<ontaktplättchen durch einen nicht näher dargestellten Trennstempel abgetrennt und über die Arbeits-Trommel 7 zu dem Trägerband 4 geführt, wo sie dann mittels Elektroden 8 angeschweißt werden. Das Trägerband 4 mit den darauf aufgeschweißten Kontaktplättchen 9 wird auf einer dritten Haspel 10 bevorratet. Bei dem der Schweißvorrichtung 1 zugeführten Kontaktmaterial 6 handelt es sich um ein Wolfram-Band bzw. um bevorratete Wolframstäbe mit einer dünnen Lotschicht 11 auf ihrer Schweißseite, wie dies aus Figur 2 ersichtlich ist. Dieses Wolfram-Band bzw. diese Wolfram-Stäbe, die bereits in einem separaten Arbeitsgang mit Schlitzen in einem der erwünschten Kontaktlängen 14 entsprechenden Abstand versehen wurden, werden in einer Trennvorrichtung 12, die in der Schweißvorrichtung 1 vor der Arbeits-Trommel 7 angeordnet ist, abgetrennt. Die Kontaktbreite 15 wird durch die Breite des in Figur 2 mit dem Bezugszeichen 16 bezeichneten Wolfram-Bandes bzw. Stabes bestimmt. Die Schlitze 13, die etwa eine Breite (Bezugszeichen 17) von 0,1 mm aufweisen, können in einer Schlitzvorrichtung mittels Sägeblatt oder auch durch einen Laser ausgeführt werden. Die Schlitze 13 werden so ausgeführt, daß zwischen den einzelnen Kontaktplättchen 9 Stege 18 aus dem WolframKontaktwerkstoff verbleiben. Die einzelnen Kontaktplättchen können dadurch, daß die Schlitze 12 vorgesehen sind, in der Schweißvorrichtung 1 leicht durch den Trennstempel abgetrennt bzw. abgebrochen werden, ohne daß hierbei das Kontaktplättchen selbst durch Reißen des harten und spröden Kontaktwerkstoffes beschädigt wird.The device shown in FIG. 1 for automatic resistance welding of metal plates forming electrical contacts to predetermined locations on a carrier tape has a welding device 1 with a table 2. The welding device 1 is supplied with a carrier tape 4 stored on a reel 3 and with contact material 6 stored in the form of a tape on a further reel 5. The individual contact plates are separated from the contact material 6 by a separating stamp (not shown) and over the working drum 7 to the carrier tape 4, where they are then welded by means of electrodes 8. The carrier tape 4 with the contact plates 9 welded thereon is stored on a third reel 10. The contact material 6 fed to the welding device 1 is a tungsten strip or stored tungsten rods with a thin solder layer 11 on its welding side, as can be seen from FIG. 2. This tungsten strip or these tungsten rods, which have already been provided with slots at a distance corresponding to the desired contact lengths 14 in a separate working step, are in a separating device 12, which is arranged in the welding device 1 in front of the working drum 7, severed. The contact width 15 is determined by the width of the tungsten strip or rod designated by the reference number 16 in FIG. The slots 13, which have a width (reference number 17) of 0.1 mm, can be made in a slot device by means of a saw blade or also by a laser. The slots 13 are designed in such a way that webs 18 made of the tungsten contact material remain between the individual contact plates 9. The individual contact plates can be easily separated or broken off in the welding device 1 by the separating stamp in that the slots 12 are provided, without the contact plate itself being damaged by tearing of the hard and brittle contact material.

Bei dem in Figur 3 gezeigten bereits aus dem Trägerband ausgestanzten Kontakt 20 sind die Unebenheiten der Bruchstelle 19 noch deutlich zu sehen.In the case of the contact 20 shown in FIG. 3, which has already been punched out of the carrier tape, the unevenness of the breaking point 19 can still be clearly seen.

Claims (9)

1. Verfahren zum automatischen Widerstandsschweißen von elektrische Kontakte bildenden Metallplättchen auf vorbestimmte Stellen eines Trägerbandes, bei dem Metallplättchen von einem Band abgetrennt einer Schweißstelle zugeführt und auf das Trägerband aufgeschweißt werden, dadurch gekennzeichnet, daß zum Aufschweißen eines Kontaktplättchens aus einem harten und spröden Kontaktwerkstoff, wie Molybdän und insbesondere Wolfram oder deren Basis-Legierungen ein Kontaktwerkstoff-Band oder-Stab zugeführt wird, das auf der Schweißseite eine Lotschicht aufweist und das im Abstand der Kontaktabmessung auf der der Schweißseite abgekehrten Kontaktwerkstoff-Oberfläche mit Schlitzen versehen wird, wobei die Kontaktplättchen an diesen schlitzartigen Trennstellen vom Kontaktwerkstoff-Band oder -Stab gelöst werden.1. A method for automatic resistance welding of electrical contacts forming metal plates on predetermined locations of a carrier tape, in which metal plates are separated from a tape fed to a welding point and welded onto the carrier tape, characterized in that for welding a contact plate made of a hard and brittle contact material, such as Molybdenum and in particular tungsten or their base alloys, a contact material strip or rod is supplied which has a solder layer on the welding side and which is provided with slots at the distance of the contact dimension on the contact material surface facing away from the welding side, the contact plates on these slit-like separating points can be detached from the contact material strip or rod. 2. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß das Kontaktwerkstoff-Band mit Schlitzen versehen wird, die mindestens eine einem Drittel der Dicke der Kontaktwerkstoffschicht entsprechende Tiefe aufweist.2. The method according to claim 1, characterized in that the contact material strip is provided with slots which has at least a depth corresponding to one third of the thickness of the contact material layer. 3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß die Schlitze in einer Tiefe von zwei Drittel ausgeführt werden.3. The method according to claim 2, characterized in that the slots are made at a depth of two thirds. 4. Verfahren nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Schlitze in einer Breite von efwa 0,1 mm zeichnet, daß die Schlitze in einer Breite von efwa 0,1 mm ausgeführt werden.4. The method according to any one of claims 1 to 3, characterized in that the slots are drawn in a width of efwa 0.1 mm, that the slots are made in a width of efwa 0.1 mm. 5. Halbzeug für die Herstellung von auf einem Trägerband aufgeschweißten Kontakten aus einem harten und spröden Kontaktwerkstoff, wie Molybdän oder insbesondere Walfram oder deren Basis-Legierungen, dadurch gekennzeichnet, daß es aus einem Kontaktwerkstoff-Band oder -Stab besteht, des auf der aufzuschweißenden Seite eine Lötschicht aufweist.5. Semi-finished product for the production of welded contacts on a carrier tape made of a hard and brittle contact material, such as molybdenum or especially tungsten or their base alloys, characterized in that it consists of a contact material tape or rod, which on the side to be welded has a solder layer. 6. Halbzeug nach Anspruch 5, dadurch gekennzeichnet, daß in der der Lötschicht entgegengesetzten Kontaktwerkstoff- Oberfläche im Abstand einer gewünschten Kontaktabmessung Schlitze ausgebildet sind.6. Semi-finished product according to claim 5, characterized in that slots are formed in the contact material surface opposite the solder layer at a distance from a desired contact dimension. 7. Halbzeug nach Anspruch 6, dadurch gekennzeichnet, daß die Schlitze eine mindestens einem Drittel der Dicke der Kontaktwerkstoffschicht entsprechende Tiefe hab n.7. Semi-finished product according to claim 6, characterized in that the slots have a depth corresponding to at least one third of the thickness of the contact material layer. 8. Halbzeug nach Anspruch 7, dadurch gkennzeichnet, daß die Schlitze eine zwei Drittel der Dicke der Kontaktwerkstoffschicht entsprechende Tiefe aufweisen.8. Semi-finished product according to claim 7, characterized in that the slots have a depth corresponding to two thirds of the thickness of the contact material layer. 9. Halbzeug nach einem der Ansprüche 6 bis 8, dadurch gekennzeichnet, daß die Breite der Schlitze 0,1 mm beträgt.9. Semi-finished product according to one of claims 6 to 8, characterized in that the width of the slots is 0.1 mm.
EP85104358A 1984-05-12 1985-04-10 Method of automatic resistance welding of electric contact plates onto a supporting belt and semifinished products for the fabrication of contacts of hard and brittle contact material to be welded onto a supporting belt Withdrawn EP0161487A3 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19843417762 DE3417762A1 (en) 1984-05-12 1984-05-12 METHOD FOR THE AUTOMATIC RESISTANCE WELDING OF ELECTRICAL CONTACT PLATES ON A CARRIER BAND AND SEMI-PRODUCT FOR THE PRODUCTION OF CONTACTS TO BE WELDED ONTO A CARRIER TAPE FROM HARD AND BRED CONTACT MATERIALS
DE3417762 1984-05-12

Publications (2)

Publication Number Publication Date
EP0161487A2 true EP0161487A2 (en) 1985-11-21
EP0161487A3 EP0161487A3 (en) 1986-10-08

Family

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Family Applications (1)

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EP85104358A Withdrawn EP0161487A3 (en) 1984-05-12 1985-04-10 Method of automatic resistance welding of electric contact plates onto a supporting belt and semifinished products for the fabrication of contacts of hard and brittle contact material to be welded onto a supporting belt

Country Status (3)

Country Link
EP (1) EP0161487A3 (en)
JP (1) JPS60250518A (en)
DE (1) DE3417762A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0806782A3 (en) * 1996-05-06 1999-06-02 DODUCO GmbH Method of joining a solder foil to contact pieces for electrical switches

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1281766C (en) * 1985-12-19 1991-03-19 Martin E. Muzeroll Method and apparatus for position orientation of a metal halide lamp base assembly
DE4317950A1 (en) * 1993-05-28 1994-12-01 Siemens Ag Coated metal strip as a semi-finished product for electrical contact pieces and method for applying such contact pieces to a carrier
DE19741930A1 (en) * 1997-09-23 1999-04-08 Siemens Ag Contact profile band for relay or switching device

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1748938A (en) * 1928-06-27 1930-03-04 Fansteel Prod Co Inc Means for soldering contact points
US2477894A (en) * 1948-04-23 1949-08-02 Albert F Pityo Method of and apparatus for forming and welding contacts
DD97365A1 (en) * 1972-07-03 1973-05-14
DE2642040C3 (en) * 1976-09-18 1979-11-15 W.C. Heraeus Gmbh, 6450 Hanau Machine for the automatic resistance welding of metal plates forming electrical contacts on predetermined positions on a carrier tape
JPS56123627A (en) * 1980-03-03 1981-09-28 Tetsuo Takano Method of manufacturing electric contact
JPS5893568A (en) * 1981-11-30 1983-06-03 Matsushita Electric Works Ltd Spot welding method for contact

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0806782A3 (en) * 1996-05-06 1999-06-02 DODUCO GmbH Method of joining a solder foil to contact pieces for electrical switches

Also Published As

Publication number Publication date
DE3417762C2 (en) 1987-09-24
EP0161487A3 (en) 1986-10-08
JPS60250518A (en) 1985-12-11
DE3417762A1 (en) 1985-11-28

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