EP0050767B1 - Arrangement for welding a contact piece to a contact support - Google Patents

Arrangement for welding a contact piece to a contact support Download PDF

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Publication number
EP0050767B1
EP0050767B1 EP81108097A EP81108097A EP0050767B1 EP 0050767 B1 EP0050767 B1 EP 0050767B1 EP 81108097 A EP81108097 A EP 81108097A EP 81108097 A EP81108097 A EP 81108097A EP 0050767 B1 EP0050767 B1 EP 0050767B1
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EP
European Patent Office
Prior art keywords
contact piece
contact
container
carrier
welding
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Expired
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EP81108097A
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German (de)
French (fr)
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EP0050767A1 (en
Inventor
Harald Ing. Grad. Weber
Friedrich Ing. Grad. Niebuhr
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BBC Brown Boveri AG Germany
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Brown Boveri und Cie AG Germany
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Application filed by Brown Boveri und Cie AG Germany filed Critical Brown Boveri und Cie AG Germany
Priority to AT81108097T priority Critical patent/ATE8826T1/en
Publication of EP0050767A1 publication Critical patent/EP0050767A1/en
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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

Definitions

  • the invention relates to an arrangement for welding a contact piece onto a contact carrier for an electrical switching device by means of ultrasound, with a welding anvil, a receptacle resting thereon for holding the contact carrier and with a sonotrode, the welding anvil and the receptacle being penetrated by a bore in which the contact material is pressed against the contact carrier by means of a stamp.
  • contact pieces on contact carriers have either been soldered or riveted.
  • certain erosion-resistant materials e.g. Ag-CdO, Ag-SnO and the like
  • soldering or welding is very difficult because such contact piece materials have a low soldering and / or welding ability.
  • a method for connecting contact bodies to contact carriers has become known (DE-B-1 564 572), in which an ultrasonic welding is carried out.
  • the contact body is fed as a blank to the oscillator (sonotrode) of an ultrasonic welding device, which is designed as a stamp for the contact, and is deformed to its final shape by the simultaneous action of considerable pressure and ultrasonic vibrations and at the same time is welded to the contact carrier.
  • the head of the vibrator has a dome-shaped recess corresponding to the contact size to be produced, with cutting edges on its contact surface.
  • FR-A-2 308 181 Another possibility is shown in FR-A-2 308 181, in which an intermediate layer is provided between the contact carrier and the contact piece, a die for the contact piece being formed in the oscillating head.
  • a recess provided in the oscillator serves as a die for the contact piece. This results in the problem that excess material for the contact piece as a result of the contact pressure and the plasticization during the welding process - since it is not compressible - can be pressed out like a ridge in die forgings between the oscillating head and the contact carrier or between the contact carrier and the holder holding it, which makes post-processing necessary.
  • the object of the invention is therefore to provide arrangements of the type mentioned at the outset in which the contact piece material does not flow away during the welding process.
  • This object is achieved according to the invention in that either a ring-shaped annular projection protruding from the surface of the receptacle facing the contact piece carrier or a surface protruding from the receptacle face facing the receptacle, integrally formed on the receptacle or on the contact piece carrier, is provided is.
  • a protruding from the surface of the sonotrode facing the contact piece carrier for transferring the ultrasonic energy to the welding point is formed on the sonotrode, the hole in the receptacle on the side of the contact piece carrier facing away from the sonotrode comprehensive ring projection provided.
  • the ring beads which act as a sealing edge, prevent the contact piece material from flowing away to the side during the actual welding process.
  • An ultrasound welding device 12 is mounted on a base frame 10 and carries a sonotrode or oscillator 14.
  • F denotes the direction of vibration of the sonotrode 14.
  • the base frame 10 has an opening or recess 16 into which an anvil 20 provided with a collar 18 is fitted, on the upper surface of which a receptacle 22 is fastened, on which a contact piece carrier 24 is placed.
  • the anvil 20 and the receptacle 22 are each penetrated by a bore 26 or 28, the diameter of the bore 26 being larger than the diameter of the bore 28.
  • a piston 30 of a pressure device is provided. which is designed with two areas 29 and 31.
  • the region 29 with a larger diameter is in the bore 26 of the anvil 20 20 and the region 31 with a smaller diameter is guided in the bore 28 of the receptacle 22.
  • the outside diameter of the area 29 corresponds to the inside diameter of the bore 26 and the outside diameter of the area 31 corresponds to the inside diameter of the bore 28.
  • This inside diameter of the bore 28 also corresponds in cross section to the cross section of the contact piece not shown in FIG. 1.
  • the device works as follows: A wire section 32, which is made of contact piece material, is inserted manually or automatically into the bore 26 of the anvil 20.
  • the contact piece carrier 24 is then placed on the receptacle adapted to the contact piece carrier 24.
  • the sonotrode 14 moves in the direction of the arrow F 1 onto the contact carrier 24 and presses it onto the receptacle 22 with a certain pressure force.
  • the piston 30, which engages in the bore 28 of the receptacle, then presses the wire section 32 with a certain pressure force F 2 to the carrier part 24.
  • the ultrasound is then triggered and the wire section is welded to the carrier part 24 while simultaneously shaping the contact piece.
  • the individual movable elements, the sonotrode 14 and the piston 30, move back into the starting position shown in FIG. 1.
  • parts of the wire 32 can flow out as a result of cold flow due to the action of pressure and ultrasound between the upper surface of the receptacle 22 and the surface of the contact piece carrier 24 touching it (see arrow direction F 3 or F 4 ).
  • the reason for this can be seen in the fact that the pressure with which the piston is pressed against the contact piece from below is very high, that the contact pressure of the sonotrode 14 is reduced in the direction of the arrow F 1 , and thus the seal in the area of the contacting surfaces between the contact piece carrier and the receptacle is no longer sufficient.
  • a bead-shaped sealing edge 34 is formed on the surface of the receptacle 22 which faces the contact carrier 24 and surrounds the bore 28 of the receptacle 22.
  • an annular groove 36 is pressed into the contact piece carrier 24 by the sealing edge 34 due to the ultrasonic vibrations and the resulting contact pressure with which the contact piece carrier 24 is pressed onto the receptacle by the sonotrode 14 in the direction of the arrow F 1 , which acts as a seal works and prevents the contact material from flowing away.
  • FIGS. 4 and 5 show the device before welding and FIG. 5 shows the device during the welding process.
  • the contact piece carrier 38 has a projection 40 on its surface facing the receptacle 22, which conversely corresponds to the projection 34 on the receptacle.
  • This projection 40 has been brought about in that the contact piece 38 is punched accordingly in its entirety; one can see on the surface of the contact piece carrier 38 opposite the projection, an annular groove 42 originating from the stamping process, but which is not necessary for the invention.
  • the contact piece carrier 38 is pressed onto the receptacle 22 in the same way as in the known embodiment.
  • the projection 40 fits tightly against the receptacle 22 and also definitely prevents the contact material from flowing away. It has been found that after the welding process is complete, the projection 40 is completely reformed. Although this solution also leads to the goal, the one according to FIG. 3 is preferred.
  • a protrusion 44 is formed on the surface of the sonotrode 14, which is placed on the contact piece carrier 24, the circumscribed cross-sectional area of the cross-sectional area of the bore 24 in the device according to FIG Recording 22 or the contact piece attached later corresponds.
  • This arrangement can only be used with relatively thin contact piece carriers, i.e. in those contact piece carriers in which the local strong pressure increase exerted by the projection is passed on to the contact piece carrier, so that in the area outside the opening 28 a pressure peak from the contact piece carrier onto the upper surface of the Recording is exercised, similar to the configuration according to FIG. 4.

Abstract

1. Arrangement for welding a contact piece onto a contact carrier (24) for an electrical switch device by means of ultrasound, with a welding anvil (20), a container (22) lying thereon for holding the contact piece carrier, and a sonotrode (14), wherein the welding anvil and the container are traversed by a bore (26) in which the contact material (32) is pressed by means of a piston (30) against the contact piece carrier, characterised in that either a bead-like annular protruberance (34, 40) projecting from the surface of the container (22) opposite the contact piece carrier (24) or a bead-like annular protruberance projecting from the surface of the contact piece carrier (38) opposite the container (22), formed on the container (22) or on the container piece carrier (24, 38) and directly enclosing the bore (26) in the container (22), is provided.

Description

Die Erfindung betrifft eine Anordnung zum Aufschweissen eines Kontaktstückes auf einen Kontaktträger für ein elektrisches Schaltgerät mittels Ultraschall, mit einem Schweissamboss, einer darauf aufliegenden Aufnahme zur Halterung des Kontaktträgers und mit einer Sonotrode, wobei der Schweissambos und die Aufnahme von einer Bohrung durchdrungen sind, in der das Kontaktmaterial mittels eines Stempels gegen den Kontaktträger gedrückt ist.The invention relates to an arrangement for welding a contact piece onto a contact carrier for an electrical switching device by means of ultrasound, with a welding anvil, a receptacle resting thereon for holding the contact carrier and with a sonotrode, the welding anvil and the receptacle being penetrated by a bore in which the contact material is pressed against the contact carrier by means of a stamp.

In der Vergangenheit sind Kontaktstücke auf Kontaktträger entweder aufgelötet oder aufgenietet worden. Bei bestimmten abbrandfesten Materialien, wie z.B. Ag-CdO, Ag-SnO und dergleichen, ist ein Auflöten oder Aufschweissen sehr schwierig, weil derartige Kontaktstückmaterialien eine geringe Löt-und/oder Schweissfähigkeit besitzen. Man hat daher zwischen dem Kontaktstück aus den genannten Materialien und dem Kontaktstückträger aus Kupfer eine oder mehrere Zwischenschichten aus Silber oder aus einer Silberlegierung aufgebracht, die die Lötung bzw. Schweissung einerseits am Kupferkontaktstückträger und andererseits am Kontaktstück «vermitteln». Bei den stark angestiegenen Rohstoffpreisen und insbesondere Silberpreisen ist eine derartige Verschweissung aufwendig und teuer.In the past, contact pieces on contact carriers have either been soldered or riveted. With certain erosion-resistant materials, e.g. Ag-CdO, Ag-SnO and the like, soldering or welding is very difficult because such contact piece materials have a low soldering and / or welding ability. One has therefore applied one or more intermediate layers made of silver or a silver alloy between the contact piece made of the materials mentioned and the contact piece support made of copper, which "mediate" the soldering or welding on the one hand on the copper contact piece support and on the other hand on the contact piece. Given the sharp rise in raw material prices and especially silver prices, such welding is complex and expensive.

Es ist ein Verfahren zum Verbinden von Kontaktkörpern mit Kontaktträgern bekanntgeworden (DE-B-1 564 572), bei dem eine Ultraschallschweissung vorgenommen wird. Der Kontaktkörper wird als Rohling dem als Prägestempel für den Kontakt ausgebildeten Schwinger (Sonotrode) eines Ultraschallschweissgerätes zugeführt und durch die gleichzeitige Einwirkung von erheblichem Druck und Ultraschallschwingungen zu seiner Endform verformt und zugleich mit dem Kontaktträger verschweisst. Der Kopf des Schwingers weist hierfür eine der herzustellenden Kontaktgrösse entsprechende kalottenförmige Ausnehmung mit Schneidkanten an seiner Anlagefläche auf.A method for connecting contact bodies to contact carriers has become known (DE-B-1 564 572), in which an ultrasonic welding is carried out. The contact body is fed as a blank to the oscillator (sonotrode) of an ultrasonic welding device, which is designed as a stamp for the contact, and is deformed to its final shape by the simultaneous action of considerable pressure and ultrasonic vibrations and at the same time is welded to the contact carrier. For this purpose, the head of the vibrator has a dome-shaped recess corresponding to the contact size to be produced, with cutting edges on its contact surface.

Es ist ferner bekannt, vergleiche DE-B-2 642 339, einen Kontaktkörper herzustellen, bei dem ein Kontaktstück durch Schall- bzw. Ultraschallschweissung mit einem Träger verbunden wird. Dabei werden zwischen dem Kontaktstück und dem Träger im Bereich der Trennebene Partikel eines Schleifpulvers zwischengefügt, die beim Ultraschall-Schweissvorgang die Oberfläche des Kontaktstückes und des Trägers im Verbindungsbereich unregelmässig aufreissen, so dass durch diese Anrauhung der zu verschweissenden Oberflächen eine günstige Beeinflussung des Schweissvorganges und eine Beschleunigung der Kaltschweissung erzielt wird.It is also known to compare DE-B-2 642 339 to produce a contact body in which a contact piece is connected to a carrier by sound or ultrasonic welding. Particles of an abrasive powder are interposed between the contact piece and the support in the area of the parting plane, which irregularly tear open the surface of the contact piece and the support in the connection area during the ultrasonic welding process, so that this roughening of the surfaces to be welded has a favorable influence on the welding process and Acceleration of the cold welding is achieved.

Eine weitere Möglichkeit ist in der FR-A-2 308 181 aufgezeigt, in der eine Zwischenlage zwischen Kontaktträger und Kontaktstück vorgesehen ist, wobei in den Schwingerkopf ein Gesenk für das Kontaktstück eingeformt ist.Another possibility is shown in FR-A-2 308 181, in which an intermediate layer is provided between the contact carrier and the contact piece, a die for the contact piece being formed in the oscillating head.

Bei allen genannten Verfahren dient eine im Schwinger vorgesehene Ausnehmung als Gesenk für das Kontaktstück. Damit ergibt sich jeweils das Problem, dass überschüssiges Material für das Kontaktstück infolge des Anpressdruckes und der Plastifizierung während des Schweissvorganges - da nicht kompressibel - ähnlich wie ein Grat bei Gesenkschmiedstücken zwischen Schwingerkopf und Kontaktträger bzw. zwischen Kontaktträger und der ihn haltenden Aufnahme herausgepresst werden kann, was eine Nachbearbeitung erforderlich macht.In all of the methods mentioned, a recess provided in the oscillator serves as a die for the contact piece. This results in the problem that excess material for the contact piece as a result of the contact pressure and the plasticization during the welding process - since it is not compressible - can be pressed out like a ridge in die forgings between the oscillating head and the contact carrier or between the contact carrier and the holder holding it, which makes post-processing necessary.

Zur Abhilfe kann es daher zweckmässig sein, eine Anordnung zu wählen, die einen dem jeweiligen Kontaktstückvolumen anpassbaren Raum aufweist, in dem das Kontaktstück mit der erforderlichen Presskraft an den Kontaktträger gepresst wird. Doch wie eine konkrete Ausführung dieser Überlegung zeigt (Fig. 1 und 2), ist auch hierbei ein Wegfliessen des Kontaktstückmaterials nicht auszuschliessen.To remedy this, it can therefore be expedient to choose an arrangement which has a space which can be adapted to the respective contact piece volume and in which the contact piece is pressed against the contact carrier with the required pressing force. However, as a concrete implementation of this consideration shows (FIGS. 1 and 2), a flowing away of the contact piece material cannot be ruled out here either.

Aufgabe der Erfindung ist es daher, Anordnungen der eingangs genannten Art zu schaffen, bei denen ein Wegfliessen des Kontaktstückmaterials während des Schweissvorganges vermieden wird.The object of the invention is therefore to provide arrangements of the type mentioned at the outset in which the contact piece material does not flow away during the welding process.

Diese Aufgabe wird erfindungsgemäss dadurch gelöst, dass entweder ein aus der dem Kontaktstückträger zugewandten Oberfläche der Aufnahme oder ein aus der der Aufnahme zugewandten Oberfläche des Kontaktstückträgers herausragender, an der Aufnahme bzw. am Kontaktstückträger angeformter, die Bohrung in der Aufnahme unmittelbar umfassender, wulstartiger Ringvorsprung vorgesehen ist.This object is achieved according to the invention in that either a ring-shaped annular projection protruding from the surface of the receptacle facing the contact piece carrier or a surface protruding from the receptacle face facing the receptacle, integrally formed on the receptacle or on the contact piece carrier, is provided is.

Gemäss einer weiteren Lösung der gestellten Aufgabe wird bei Verarbeitung sehr dünner Kontaktstückträger ein aus der dem Kontaktstückträger zugewandten Oberfläche der Sonotrode zur Übertragung der Ultraschallenergie auf die Schweissstelle herausragender, an die Sonotrode angeformter, die Bohrung in der Aufnahme auf der der Sonotrode abgewandten Seite des Kontaktstückträgers unmittelbar umfassender Ringvorsprung vorgesehen.According to a further solution to the problem, when processing very thin contact piece carriers, a protruding from the surface of the sonotrode facing the contact piece carrier for transferring the ultrasonic energy to the welding point is formed on the sonotrode, the hole in the receptacle on the side of the contact piece carrier facing away from the sonotrode comprehensive ring projection provided.

Durch die Ringwulste, die als Dichtkante wirken, wird verhindert, dass das Kontaktstückmaterial während des eigentlichen Schweissvorganges seitlich wegfliessen kann.The ring beads, which act as a sealing edge, prevent the contact piece material from flowing away to the side during the actual welding process.

In der Zeichnung sind eine bekannte Ausführung und Ausführungsbeispiele der Erfindung dargetellt.A known embodiment and exemplary embodiments of the invention are shown in the drawing.

Es zeigt:

  • Fig. 1 und 2 eine bekannte Anordnung vor dem Schweissvorgang und während des Schweissvoranges,
  • Fig. 3 bis 6 jeweils unterschiedliche Ausgestaltungen einer erfindungsgemässen Anordnung.
It shows:
  • 1 and 2 a known arrangement before the welding process and during the welding process,
  • 3 to 6 each have different configurations of an arrangement according to the invention.

Auf einem Grundrahmen 10 ist ein Ultraschallschweissgerät 12 angebracht, welches eine Sonotrode oder Schwinger 14 trägt. F bezeichnet die Schwingungsrichtung der Sonotrode 14. Der Grundrahmen 10 besitzt eine Öffnung oder Ausnehmung 16, in die ein mit einem Kragen 18 versehener Amboss 20 eingepasst ist, auf dessen oberer Fläche eine Aufnahme 22 befestigt ist, auf den ein Kontaktstückträger 24 aufgelegt ist. DerAmboss 20 und die Aufnahme 22 sind jeweils von einer Bohrung 26 bzw. 28 durchdrungen, wobei der Durchmesser der Bohrung 26 grösser ist als der Durchmesser der Bohrung 28. Zum Aufbringen einer Druckkraft beim eigentlichen Verschweissvorgang ist ein Kolben 30 einer nicht weiter dargestellten Druckeinrichtung vorgesehen, der gestuft mit zwei Bereichen 29 und 31 ausgebildet ist. Der Bereich 29 mit grösserem Durchmesser ist in der Bohrung 26 des Ambosses 20 20 und der Bereich 31 mit geringerem Durchmesser ist in der Bohrung 28 der Aufnahme 22 geführt. Dabei entspricht selbstverständlich der Aussendurchmesser des Bereiches 29 dem Innendurchmesser der Bohrung 26 bzw. der Aussendurchmesser des Bereiches 31 dem Innendurchmesser der Bohrung 28. Dieser Innendurchmesser der Bohrung 28 entspricht weiterhin im Querschnitt dem Querschnitt des in der Fig. 1 nicht dargestellten Kontaktstückes.An ultrasound welding device 12 is mounted on a base frame 10 and carries a sonotrode or oscillator 14. F denotes the direction of vibration of the sonotrode 14. The base frame 10 has an opening or recess 16 into which an anvil 20 provided with a collar 18 is fitted, on the upper surface of which a receptacle 22 is fastened, on which a contact piece carrier 24 is placed. The anvil 20 and the receptacle 22 are each penetrated by a bore 26 or 28, the diameter of the bore 26 being larger than the diameter of the bore 28. To apply a compressive force during the actual welding process, a piston 30 of a pressure device, not shown, is provided. which is designed with two areas 29 and 31. The region 29 with a larger diameter is in the bore 26 of the anvil 20 20 and the region 31 with a smaller diameter is guided in the bore 28 of the receptacle 22. Of course, the outside diameter of the area 29 corresponds to the inside diameter of the bore 26 and the outside diameter of the area 31 corresponds to the inside diameter of the bore 28. This inside diameter of the bore 28 also corresponds in cross section to the cross section of the contact piece not shown in FIG. 1.

Die Wirkungsweise der Vorrichtung ist wie folgt: Ein Drahtabschnitt 32, der aus Kontaktstückmaterial hergestellt ist, wird manuell oder automatisch in die Bohrung 26 des Ambosses 20 eingelegt. Danach wird der Kontaktstückträger 24auf die dem Kontaktstückträger 24 angepasste Aufnahme aufgelegt. Beim Schweissvorgang fährt die Sonotrode 14 gemäss Pfeilrichtung F1 auf den Kontaktträger 24 zu und drückt diesen mit einer bestimmten Druckkraft auf die Aufnahme 22. Danach drückt der Kolben 30, der in die Bohrung 28 der Aufnahme hineingreift, den Drahtabschnitt 32 mit einer bestimmten Druckkraft F2 an das Trägerteil 24. Danach wird der Ultraschall ausgelöst und der Drahtabschnitt wird unter gleichzeitigem Formen des Kontaktstückes an das Trägerteil 24 angeschweisst. Nach Beendigung des Schweissvorganges fahren die einzelnen beweglichen Elemente, die Sonotrode 14 und der Kolben 30, wieder in die in der Fig. 1 gezeigte Ausgangsstellung zurück.The device works as follows: A wire section 32, which is made of contact piece material, is inserted manually or automatically into the bore 26 of the anvil 20. The contact piece carrier 24 is then placed on the receptacle adapted to the contact piece carrier 24. During the welding process, the sonotrode 14 moves in the direction of the arrow F 1 onto the contact carrier 24 and presses it onto the receptacle 22 with a certain pressure force. The piston 30, which engages in the bore 28 of the receptacle, then presses the wire section 32 with a certain pressure force F 2 to the carrier part 24. The ultrasound is then triggered and the wire section is welded to the carrier part 24 while simultaneously shaping the contact piece. After the welding process has ended, the individual movable elements, the sonotrode 14 and the piston 30, move back into the starting position shown in FIG. 1.

Bei der Ausgestaltung gemäss der Fig. 1 bzw. Fig. 2 können Teile des Drahtes 32 infolge Kaltfluss durch Einwirkung von Druck und Ultraschall zwischen der oberen Fläche der Aufnahme 22 und der diese berührenden Fläche des Kontaktstückträgers 24 herausfliessen (siehe Pfeilrichtung F3 bzw. F4). Der Grund hierfür ist darin zu sehen, dass der Druck, mit dem der Kolben von unten gegen das Kontaktstück angepresst wird, sehr hoch ist, dass der Anpressdruck der Sonotrode 14 in Pfeilrichtung F1 verringert wird und so die Abdichtung im Bereich der sich berührenden Flächen zwischen Kontaktstückträger und der Aufnahme nicht mehr ausreicht. Eine Verringerung des Anpressdruckes derart, dass ein Wegfliessen nicht mehr stattfindet, ist aber nicht möglich, da sonst eine ausreichende Verschweissung nicht mehr gewährleistet werden kann.In the embodiment according to FIGS. 1 and 2, parts of the wire 32 can flow out as a result of cold flow due to the action of pressure and ultrasound between the upper surface of the receptacle 22 and the surface of the contact piece carrier 24 touching it (see arrow direction F 3 or F 4 ). The reason for this can be seen in the fact that the pressure with which the piston is pressed against the contact piece from below is very high, that the contact pressure of the sonotrode 14 is reduced in the direction of the arrow F 1 , and thus the seal in the area of the contacting surfaces between the contact piece carrier and the receptacle is no longer sufficient. However, it is not possible to reduce the contact pressure in such a way that it no longer flows away, since otherwise sufficient welding can no longer be guaranteed.

Um ein Wegfliessen zu verhindern, kann man mehrere Möglichkeiten vorsehen:There are several ways to prevent it from flowing away:

Gemäss der Fig. 3 wird an der Fläche der Aufnahme 22, die dem Kontaktträger 24 zugewandt ist, eine wulstförmige Dichtkante 34 angeformt, die die Bohrung 28 der Aufnahme 22 umgibt. Beim Schweissvorgang wird nun aufgrund der Ultraschall-Schwingungen und der resultierenden Andruckkraft, mit dem der Kontaktstückträger 24 von der Sonotrode 14 gemäss Pfeilrichtung F1 auf die Aufnahme gedrückt wird, von der Dichtkante 34 eine ringförmige Nut 36 in den Kontaktstückträger 24 eingedrückt, was als Dichtung wirkt und ein Wegfliessen des Kontaktmaterials verhindert.According to FIG. 3, a bead-shaped sealing edge 34 is formed on the surface of the receptacle 22 which faces the contact carrier 24 and surrounds the bore 28 of the receptacle 22. During the welding process, an annular groove 36 is pressed into the contact piece carrier 24 by the sealing edge 34 due to the ultrasonic vibrations and the resulting contact pressure with which the contact piece carrier 24 is pressed onto the receptacle by the sonotrode 14 in the direction of the arrow F 1 , which acts as a seal works and prevents the contact material from flowing away.

Eine weitere Ausgestaltung der Erfindung ist aus den Fig. 4 und 5 zu ersehen. Dabei zeigt die Fig. 4 die Vorrichtung vor dem Schweissen und die Fig. 5 die Vorrichtung während des Schweissvorganges. Der Kontaktstückträger 38 besitzt auf seiner der Aufnahme 22 zugewandten Fläche einen Vorsprung 40, der umgekehrt dem Vorsprung 34 an der Aufnahme entspricht. Dieser Vorsprung 40 ist dadurch bewirkt worden, dass das Kontaktstück 38 in seiner Gesamtheit entsprechend gestanzt ist; man erkennt auf der dem Vorsprung gegenüberliegenden Fläche des Kontaktstückträgers 38 eine vom Stanzvorgang herrührende Ringnut 42, welche aber für die Erfindung nicht notwendig ist. Beim Schweissvorgang wird in gleicher Weise wie bei der bekannten Ausgestaltung der Kontaktstückträger 38 auf die Aufnahme 22 gedrückt. Unter der Einwirkung der Ultraschall-Schwingungenn schmiegt sich der Vorsprung 40 dicht an die Aufnahme 22 an und verhindert ebenfalls definitiv ein Wegfliessen des Kontaktmaterials. Es hat sich herausgestellt, dass nach Abschluss des Schweissvorganges der Vorsprung 40 vollständig zurückgeformt ist. Diese Lösung führt zwar auch zum Ziel, bevorzugt wird jedoch die nach Fig. 3.Another embodiment of the invention can be seen from FIGS. 4 and 5. 4 shows the device before welding and FIG. 5 shows the device during the welding process. The contact piece carrier 38 has a projection 40 on its surface facing the receptacle 22, which conversely corresponds to the projection 34 on the receptacle. This projection 40 has been brought about in that the contact piece 38 is punched accordingly in its entirety; one can see on the surface of the contact piece carrier 38 opposite the projection, an annular groove 42 originating from the stamping process, but which is not necessary for the invention. During the welding process, the contact piece carrier 38 is pressed onto the receptacle 22 in the same way as in the known embodiment. Under the action of the ultrasonic vibrations, the projection 40 fits tightly against the receptacle 22 and also definitely prevents the contact material from flowing away. It has been found that after the welding process is complete, the projection 40 is completely reformed. Although this solution also leads to the goal, the one according to FIG. 3 is preferred.

Bei der Vorrichtung nach Fig. 6 ist im Gegensatz zu den Anordnungen gemäss den Fig. 3 bis 5 an der Fläche der Sonotrode 14, die auf den Kontaktstückträger 24 aufgelegt ist, ein Vorsprung 44 angeformt, dessen umschriebene Querschnittsfläche der Querschnittsfläche der Bohrung 24 in der Aufnahme 22 bzw. dem später angebrachten Kontaktstück entspricht. Diese Anordnung ist nur bei relativ dünnen Kontaktstückträgern zu verwenden, bei solchen Kontaktstückträgern also, bei denen die durch den Vorsprung ausgeübte örtliche starke Druckerhöhung weitergegeben wird an den Kontaktstückträger, so dass im Bereich ausserhalb der Öffnung 28 eine Druckspitze von dem Kontaktstückträger auf die obere Fläche der Aufnahme ausgeübt wird, ähnlich wie bei der Ausgestaltung gemäss der Fig. 4.In contrast to the arrangements according to FIGS. 3 to 5, a protrusion 44 is formed on the surface of the sonotrode 14, which is placed on the contact piece carrier 24, the circumscribed cross-sectional area of the cross-sectional area of the bore 24 in the device according to FIG Recording 22 or the contact piece attached later corresponds. This arrangement can only be used with relatively thin contact piece carriers, i.e. in those contact piece carriers in which the local strong pressure increase exerted by the projection is passed on to the contact piece carrier, so that in the area outside the opening 28 a pressure peak from the contact piece carrier onto the upper surface of the Recording is exercised, similar to the configuration according to FIG. 4.

Bei allen diesen Ausgestaltungen hat es sich herausgestellt, dass eine Abdichtung gegen Wegfliessen des Kontaktstückmaterials beim Schweissvorgang sicher bewirkt wurde.In all of these configurations, it has been found that a seal against flow away of the contact piece material was reliably brought about during the welding process.

Claims (2)

1. Arrangement for welding a contact piece onto a contact carrier (24) for an electrical switch device by means of ultrasound, with a welding anvil (20), a container (22) lying thereon for holding the contact piece carrier, and a sonotrode (14), wherein the welding anvil and the container are traversed by a bore (26) in which the contact material (32) is pressed by means of a piston (30) against the contact piece carrier, characterised in that either a bead-like annular protruberance (34, 40) projecting from the surface of the container (22) opposite the contact piece carrier (24) or a bead-like annular protruberance projecting from the surface of the contact piece carrier (38) opposite the container (22), formed on the container (22) or on the container piece carrier (24, 38) and directly enclosing the bore (26) in the container (22), is provided.
2. Arrangement for welding a contact piece according to the first part of claim 1, characterised in that when fabricating very thin contact piece carriers (24), an annular protruberance (44) projecting from the surface of the sonotrode (14) opposite the contact piece carrier (24) to transmit ultrasound energy to the welding point, formed on the sonotrode and directly enclosing the bore (28) in the container (22) on the side of the contact piece carrier (24) opposite the said sonotrode, is provided.
EP81108097A 1980-10-23 1981-10-09 Arrangement for welding a contact piece to a contact support Expired EP0050767B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81108097T ATE8826T1 (en) 1980-10-23 1981-10-09 ARRANGEMENT FOR WELDING A CONTACT PIECE ON A CONTACT CARRIER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19803039939 DE3039939A1 (en) 1980-10-23 1980-10-23 ARRANGEMENT FOR WELDING A CONTACT PIECE TO A CONTACT CARRIER
DE3039939 1980-10-23

Publications (2)

Publication Number Publication Date
EP0050767A1 EP0050767A1 (en) 1982-05-05
EP0050767B1 true EP0050767B1 (en) 1984-08-01

Family

ID=6114980

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81108097A Expired EP0050767B1 (en) 1980-10-23 1981-10-09 Arrangement for welding a contact piece to a contact support

Country Status (5)

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EP (1) EP0050767B1 (en)
JP (1) JPS57101310A (en)
AT (1) ATE8826T1 (en)
DE (1) DE3039939A1 (en)
ES (1) ES506239A0 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2036935B1 (en) * 1991-10-16 1996-08-01 Valeo Clausor S A EMBORNATION SYSTEM FOR CONTACT SWITCHES AND STARTING OF AUTOMOBILE AND ANALOG VEHICLES AND TERMINAL FOR ITS REALIZATION.
EP2242605A4 (en) 2008-02-08 2014-02-26 Fuji Elec Fa Components & Sys Manufacturing method of electric contact and manufacturing equipment of electric contact

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2700087A (en) * 1949-05-31 1955-01-18 Cutler Hammer Inc Electrical contact member
US3337947A (en) * 1964-06-29 1967-08-29 Aluminum Co Of America Method of joining electrical contacts to aluminum parts
FR1483998A (en) * 1965-05-14 1967-09-13
DE1564572C2 (en) * 1966-04-21 1975-01-09 Siemens Ag, 1000 Berlin Und 8000 Muenchen Method for connecting contact bodies with contact carriers
DE1652865A1 (en) * 1968-01-08 1971-04-29 Bergbau U Huettenkombinat Albe Method and device for the production of multi-metal parts, in particular rivet switches
DE2005094C3 (en) * 1970-02-04 1975-11-20 Otto Bihler Kg, 8959 Trauchgau- Halblech Device for the automatic feeding of spherical contact metal blanks for welding on a surface of a contact part by means of electrical resistance welding
JPS5036225B1 (en) * 1970-03-02 1975-11-21
US3926357A (en) * 1973-10-09 1975-12-16 Du Pont Process for applying contacts
DE2517347C2 (en) * 1975-04-19 1981-10-15 G. Rau GmbH & Co, 7530 Pforzheim Contact body and manufacturing process for this
JPS5450323A (en) * 1977-09-29 1979-04-20 Nippon Chemical Ind Stop down control apparatus of single lens reflex camera

Also Published As

Publication number Publication date
ES8207381A1 (en) 1982-09-01
EP0050767A1 (en) 1982-05-05
DE3039939A1 (en) 1982-06-16
ATE8826T1 (en) 1984-08-15
ES506239A0 (en) 1982-09-01
JPS57101310A (en) 1982-06-23

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