EP1074066A2 - Contact element for current-carrying parts, in particular switches - Google Patents

Contact element for current-carrying parts, in particular switches

Info

Publication number
EP1074066A2
EP1074066A2 EP98959727A EP98959727A EP1074066A2 EP 1074066 A2 EP1074066 A2 EP 1074066A2 EP 98959727 A EP98959727 A EP 98959727A EP 98959727 A EP98959727 A EP 98959727A EP 1074066 A2 EP1074066 A2 EP 1074066A2
Authority
EP
European Patent Office
Prior art keywords
contact element
element according
contact
base
contact pad
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Withdrawn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
EP98959727A
Other languages
German (de)
French (fr)
Inventor
Burkhardt Suthoff
Andreas Schaaf
Holger Hentschel
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1074066A2 publication Critical patent/EP1074066A2/en
Withdrawn legal-status Critical Current

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K20/00—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating
    • B23K20/12—Non-electric welding by applying impact or other pressure, with or without the application of heat, e.g. cladding or plating the heat being generated by friction; Friction welding

Definitions

  • the application relates to a contact element for current-carrying parts, in particular for switches, with a base and a contact pad conductively connected to the base.
  • contact elements are used in which a base consists, for example, of a copper-based alloy and is provided with a contact pad which is conductively connected to the base.
  • the contact pad serves to protect the well current-carrying base from excessive erosion due to the sparks that are unavoidable when switching, and is usually made of a synthetic material that contains tungsten and silver.
  • the part of the contact element referred to here as the base serves e.g. for fastening in a switch housing and for connection to a current-carrying line or a corresponding component, while the contact pad forms the actual button with which a correspondingly constructed second contact element can interact.
  • the base and contact pad can be shaped depending on the requirements of the individual case and e.g. be flat or columnar and of any practical thickness.
  • the contact pad is usually connected to the base by soldering, which is disadvantageous in particular in that the solder is caused by current passage its specific resistance, which is higher than that of copper or tungsten / silver, is heated to a relatively high degree, as a result of which losses occur.
  • connection technology by soldering is further disadvantageous in that the manufacturing effort is relatively high.
  • the object of the present invention is to improve the connection between the base and the contact pad in contact elements for current-carrying parts in such a way that the contact resistance between the contact pad and the base is reduced and production is simplified.

Abstract

The invention relates to a contact element for current-carrying parts, in particular for switches, having a base and a contact coating which is electrically connected to the base. The contact element is characterized in that the coating is connected to the base by friction welding.

Description

Kontaktelement für stromführende Teile, insbesondere SchalterContact element for live parts, especially switches
Die Anmeldung betrifft ein Kontaktelement für stromführende Teile, insbesondere für Schalter, mit einem Sockel und einer mit dem Sockel leitend verbundenen Kontaktauflage.The application relates to a contact element for current-carrying parts, in particular for switches, with a base and a contact pad conductively connected to the base.
Bei herkömmlichen Kontaktelementen für Schalter der unterschiedlichsten Art und Belastbarkeit werden Kontaktelemente verwendet, bei denen ein Sockel beispielsweise aus einer Kupferbasislegierung besteht und mit einer Kontaktauflage versehen ist, die mit dem Sockel leitend verbunden ist. Die Kontaktauflage dient dazu, den gut stromleitenden Sockel vor einer allzu schnellen Erosion durch die beim Schalten unvermeidlich auftretenden Funken zu schützen, und besteht in der Regel aus einem Syntherwerkstoff, der Wolfram und Silber enthält.In the case of conventional contact elements for switches of the most varied types and load capacities, contact elements are used in which a base consists, for example, of a copper-based alloy and is provided with a contact pad which is conductively connected to the base. The contact pad serves to protect the well current-carrying base from excessive erosion due to the sparks that are unavoidable when switching, and is usually made of a synthetic material that contains tungsten and silver.
Der hier als Sockel bezeichnete Teil des Kontaktelements dient z.B. zur Befestigung in einem Schaltergehäuse und zum Anschluß an eine stromführende Leitung bzw. ein entsprechendes Bauteil, während die Kontaktauflage die eigentliche Schaltfläche bildet, mit der ein entsprechend aufgebautes, zweites Kontaktelement zusammenwirken kann. Sockel und Kontaktauflage können je nach den Erfordernissen des Einzelfalls geformt sein und z.B. flach oder säulenförmig und in jeder zweckmäßigen Dicke ausgeführt sein.The part of the contact element referred to here as the base serves e.g. for fastening in a switch housing and for connection to a current-carrying line or a corresponding component, while the contact pad forms the actual button with which a correspondingly constructed second contact element can interact. The base and contact pad can be shaped depending on the requirements of the individual case and e.g. be flat or columnar and of any practical thickness.
Meist ist die Kontaktauflage durch Löten mit dem Sockel verbunden, was insbesondere dahingehend nachteilig ist, daß sich das Lot bei Stromdurchgang aufgrund seines gegenüber Kupfer oder Wolfram/Silber höheren spezifischen Widerstands relativ stark erwärmt, wodurch Verluste auftreten.The contact pad is usually connected to the base by soldering, which is disadvantageous in particular in that the solder is caused by current passage its specific resistance, which is higher than that of copper or tungsten / silver, is heated to a relatively high degree, as a result of which losses occur.
Die bekannte Verbindungstechnik durch Löten ist weiterhin dahingehend nachteilig, daß der Fertigungsaufwand relativ hoch ist.The known connection technology by soldering is further disadvantageous in that the manufacturing effort is relatively high.
Die vorliegende Erfindung hat sich zur Aufgabe gestellt, die Verbindung zwischen Sockel und Kontaktauflage bei Kontaktelementen für stromführende Teile dahingehend zu verbessern, daß der Übergangswiderstand zwischen Kontaktauflage und Sockel verringert wird und die Fertigung vereinfacht wird.The object of the present invention is to improve the connection between the base and the contact pad in contact elements for current-carrying parts in such a way that the contact resistance between the contact pad and the base is reduced and production is simplified.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Kontaktauflage durch Reibschweißen mit dem Sockel verbunden ist.This object is achieved in that the contact pad is connected to the base by friction welding.
Vorteilhafte Weiterbildungen der Erfindung sind in den Unteransprüchen beschrieben.Advantageous developments of the invention are described in the subclaims.
Die in der vorangehenden Beschreibung, in der Zeichnung sowie in den Ansprüchen offenbarten Merkmale der Erfindung können sowohl einzeln als auch in beliebigen Kombinationen für die Verwirklichung der Erfindung in ihren verschiedenen Ausfüh- rungsformen wesentlich sein. The features of the invention disclosed in the preceding description, in the drawing and in the claims can be essential both individually and in any combination for realizing the invention in its various embodiments.

Claims

Ansprüche Expectations
1. Kontaktelement für stromführende Teile, insbesondere für Schalter, mit einem Sockel und einer mit dem Sockel leitend verbundenen Kontaktauflage, dadurch gekennzeichnet, daß die Kontaktauflage durch Reibschweißen mit dem Sockel verbunden ist.1. Contact element for current-carrying parts, in particular for switches, with a base and a contact pad connected conductively to the base, characterized in that the contact pad is connected to the base by friction welding.
2. Kontaktelement nach Anspruch 1, gekennzeichnet durch rotierende oder linear oszillierendes Reibschweißen.2. Contact element according to claim 1, characterized by rotating or linearly oscillating friction welding.
3. Kontaktelement nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Sockel aus Kupfer, insbesondere Elektrokupfer, oder aus einer Kupferlegierung besteht.3. Contact element according to claim 1 or 2, characterized in that the base consists of copper, in particular electrical copper, or of a copper alloy.
4. Kontaktelement nach Anspruch 1, 2 oder 3, dadurch gekennzeichnet, daß die Kontaktauflage aus einem gesinterten Werkstoff besteht.4. Contact element according to claim 1, 2 or 3, characterized in that the contact pad consists of a sintered material.
5. Kontaktelement nach Anspruch 4, dadurch gekennzeichnet, daß die Kontaktauflage Wolfram und Silber enthält. 5. Contact element according to claim 4, characterized in that the contact pad contains tungsten and silver.
6. Kontaktelement nach Anspruch 4, dadurch gekennzeichnet, daß die Kontaktauflage Chrom und Kupfer enthält.6. Contact element according to claim 4, characterized in that the contact pad contains chrome and copper.
7. Kontaktelement nach einem der vorangehenden Ansprüche, gekennzeichnet durch einen polygonformigen oder zylindrischen Querschnitt.7. Contact element according to one of the preceding claims, characterized by a polygonal or cylindrical cross section.
8. Kontaktelement nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Kontaktauflage aus einem funkenerosionsstabilen Hartmetall besteht.8. Contact element according to one of the preceding claims, characterized in that the contact pad consists of a spark erosion-stable hard metal.
9. Kontaktelement nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Kontaktauflage über eine zusätzliche zwischengelegte Lottablette mit dem Sockelwerkstoff verbunden ist.9. Contact element according to one of the preceding claims, characterized in that the contact pad is connected to the base material via an additional interposed soldering tablet.
10. Kontaktelement nach Anspruch 8, dadurch gekennzeichnet, daß die Kontaktauflage mit einer Diamantmanschette oder -hülse zum Schutz gegen Kantenabtragung umgeben ist. 10. Contact element according to claim 8, characterized in that the contact pad is surrounded with a diamond sleeve or sleeve for protection against edge removal.
EP98959727A 1997-10-15 1998-10-15 Contact element for current-carrying parts, in particular switches Withdrawn EP1074066A2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE29718270U DE29718270U1 (en) 1997-10-15 1997-10-15 Contact element for live parts, especially switches
DE29718270U 1997-10-15
PCT/DE1998/003024 WO1999019940A2 (en) 1997-10-15 1998-10-15 Contact element for current-carrying parts, in particular switches

Publications (1)

Publication Number Publication Date
EP1074066A2 true EP1074066A2 (en) 2001-02-07

Family

ID=8047249

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98959727A Withdrawn EP1074066A2 (en) 1997-10-15 1998-10-15 Contact element for current-carrying parts, in particular switches

Country Status (4)

Country Link
EP (1) EP1074066A2 (en)
AU (1) AU1554799A (en)
DE (1) DE29718270U1 (en)
WO (1) WO1999019940A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19748288A1 (en) * 1997-10-31 1999-05-06 Kloeckner Moeller Gmbh Low voltage switch contact piece
CN111215742A (en) * 2018-11-27 2020-06-02 西安西电高压开关有限责任公司 Connection method of copper-tungsten alloy and chromium bronze and electric contact

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2321206A1 (en) * 1975-08-15 1977-03-11 Welding Inst Solderless electrical connection to metal plate - is achieved using rotational friction of chamfered rod in conical hole in conductor to form weld
GB1570689A (en) * 1976-11-08 1980-07-09 Northern Eng Ind Electrical contacts
JPS5942580B2 (en) * 1981-03-04 1984-10-16 株式会社日立製作所 Method of manufacturing electrical contacts
EP0102728B1 (en) * 1982-07-27 1986-10-01 Luc Technologies Limited Bonding and bonded products
JPH01272017A (en) * 1988-04-21 1989-10-31 Toshiba Corp Manufacture of contact for gas insulation switch
US5715989A (en) * 1996-06-04 1998-02-10 Texas Instruments Incorporated Microelectronic wire bonding using friction welding process

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9919940A3 *

Also Published As

Publication number Publication date
WO1999019940A2 (en) 1999-04-22
WO1999019940A3 (en) 1999-07-08
DE29718270U1 (en) 1997-12-11
AU1554799A (en) 1999-05-03

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