EP0726613B1 - Vormaterial und Verfahren zur Herstellung von Vormaterial und Halbzeug für elektrische Kontakte - Google Patents
Vormaterial und Verfahren zur Herstellung von Vormaterial und Halbzeug für elektrische Kontakte Download PDFInfo
- Publication number
- EP0726613B1 EP0726613B1 EP95114277A EP95114277A EP0726613B1 EP 0726613 B1 EP0726613 B1 EP 0726613B1 EP 95114277 A EP95114277 A EP 95114277A EP 95114277 A EP95114277 A EP 95114277A EP 0726613 B1 EP0726613 B1 EP 0726613B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- tape
- coating
- copper
- contact support
- projection
- 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.)
- Revoked
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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
- H01R43/0214—Resistance welding
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
- H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
- H01R4/02—Soldered or welded connections
- H01R4/029—Welded connections
Definitions
- the invention relates to a starting material for producing electrical contacts by connecting to an electrically conductive contact carrier tape consisting essentially of copper Resistance heating, the primary material being designed as a metal strip with a contact area which has a coating on its underside of the band that can be connected to the contact carrier band comprises a material which consists essentially of silver, the Melting point of the coating material below the melting point of the metal strip lies and a process for the production of raw material and semi-finished product for electrical Contacts.
- EP-A-300 197 is the brazing of a contact plate with a braze wart known on the underside on a contact carrier.
- EP-C-42 16 224 EP-A-570 662 discloses a starting material for producing electrical contacts, for example relay contacts, in which the starting material is designed as a metal strip with a contact area which is welded to an electrically conductive one Contact carrier is also connected with an electrical conductivity of more than 15 m / (Ohm x mm 2 ) or more than (15 S x 10 6 ) / m by means of resistance heating; the contact carrier consists essentially of copper; the strip surface side of the metal strip provided with the contact area has strand-like projections as weld nipples which have a coating which consists essentially of silver, the melting point of the material of the coating being below the melting point of the metal strip; the metal strip consists essentially of nickel, the actual contact area being formed on the basis of a gold alloy or silver-palladium alloy.
- a metal strip as a starting material for the production of electrical contacts, which has a contact profile of small profile width and for resistance welding to a contact carrier strip with a high electrical conductivity of more than 15 m / (ohm x mm 2 ), as is the case, for example, with Copper is present, is suitable.
- a method for producing a semi-finished product for electrical contacts is to be specified be higher, in which the metal band as a raw material with the contact carrier band Conductivity is connected.
- the task is characterized by the characterizing features of the claim 1 solved.
- the core area of the metal strip essentially consists made of nickel; however, it is also possible to have a core area made of a copper-nickel alloy to provide.
- the object is achieved by the characterizing features of claim 4 .
- the contact area for the later work contact preferably consists of a gold or a silver-palladium alloy; it can advantageously together with the coating the protrusions are applied by roll cladding.
- the object is achieved by the characterizing features of claim 8 .
- FIG. 1a shows the metal strip 1, its auxiliary welding support or core area 2 as the primary material consists essentially of nickel or a copper-nickel base alloy; preferably an alloy with a nickel content of 30% by weight and an iron content of approx. 1 % By weight and the rest copper used; in a further preferred embodiment the core area 2 of the metal strip made of an alloy with a nickel content of 9% by weight, a tin content of 2% by weight and the rest copper.
- the actual contact area 3 for the later work contact which consists essentially of precious metal, preferably a gold alloy or silver-palladium alloy consists.
- the underside of the band 4 of the core area 2 has one in the middle Projection 5 as a weld nipple, the entire underside 4 of the band having a coating is provided, which consists essentially of silver.
- Both the core area 2 and the contact area 3 of the metal strip 1 have a cross section seen a trapezoidal outer circumference, with the profile width in the direction Tab 5 continuously increased.
- FIG. 1b shows the metal strip 1 placed on the contact carrier strip 8 in an electrode device; the coating 6 located on the strand-like projection 5 lies directly on it the surface of the contact carrier tape 8.
- the welding circuit is only partially over electrodes 9 and 10 shown closed, wherein electrode 9 is a in cross section seen trapezoidal recess 11 in which the metal band with its top is positively introduced, so that the metal strip 1 with its coated projection 5 rests precisely aligned on the surface 12 of the contact carrier strip 8; the The welding circuit is not shown here for a better overview.
- the coating 6 in the initial phase of the welding current pulse is melted and that the coating material with the substantially made of copper material of the contact carrier forms an alloy that essentially consists of silver and copper;
- the material for the contact carrier tape is also Suitable copper alloys, such as Bronze, nickel silver, copper-iron alloy or Copper-beryllium alloy.
- Figure 1c shows in cross section a contact profile strand, after which he partially in Figure 1b has shown electrode device and with the underlying contact carrier tape 8 is firmly connected electrically and mechanically; based on Figure 1c is simple recognizable that the coating originally located on the underside 4 of the metal strip 6 moves away from the projection 5 and the adjacent areas of the underside 4 and has one together with the copper in the area of the surface 12 of the contact carrier 8 connection area formed by means of melting through resistance heating Contact carrier tape 8 and metal tape 1; during the actual welding process becomes the point of contact designated by number 13 by the action of the electric current 1b heated until the silver is out of range the coating 6 and the copper from the surface area of the contact carrier 8 with one another alloy and a new alloy 14 is created by adjusting the welding parameters, the eutectic for an alloy with 28% by weight copper, the rest silver (AgCu28) with a Melting point at 779 ° C corresponds, or very obvious; when melting this alloy If necessary, the alloy formed extends depending on the length of the welding interval
- FIG. 2a shows a metal strip 1 'as a starting material, which is essentially constructed similarly, as that described with reference to Figure 1a; in contrast to Figure 1a, however, the underside of the band 4 'two strand-shaped grooves or depressions 16, 17, between which the one from FIG 1a known strand-like projection 5 is arranged.
- the depressions 16, 17 are geometric formed so that they by the volume of the melting lake 14 when welding to the Contact carrier tape 8 are filled and thus a lateral swelling of the alloy formed prevent.
- welding auxiliary supports preferably nickel or a copper-nickel base alloy used.
- the metal strip 1 'in the electrode device is shown with reference to FIG. 2b, the metal strip 1 'in the region of the projection 5 directly with the coating 6 on the Surface 12 of the contact carrier tape 8 rests.
- the two electrodes 9, 10 are only partially shown, the electrode device has been omitted for a better overview.
- the trapezoidal recess 11 of the electrode 8 is also for the form-fitting Recording of the metal strip 1 'recognizable.
- Figure 2c shows in cross section a contact profile strand after it has been shown in Figure 2b Has left the electrode device and the metal strip 1 'with the contact carrier strip 8 electrically and is mechanically firmly connected by welding.
- the contact connection point designated with number 13 between projection 5 with silver coating 6 and contact carrier 8 so strongly warmed that the silver from the coating area of the projection and then also liquefied from the strand-shaped depressions 16, 17 until the silver is out alloy the coating area and the copper from the contact carrier strip 8 with one another and thus an alloy is created which is the eutectic alloy with 28% by weight copper, Remainder corresponds to silver with a melting point at 779 ° C or is very obvious.
- the contact carrier tape is preferably made of copper, but it is also possible to use copper alloys such as bronze, nickel silver CuFe 2 or CuBe as the material for the contact carrier tape.
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Contacts (AREA)
- Manufacture Of Switches (AREA)
- Electroplating Methods And Accessories (AREA)
Description
Claims (8)
- Vormaterial zur Herstellung elektrischer Kontakte durch Verbinden mit einem elektrisch leitfähigen, im wesentlichen aus Kupfer bestehenden Kontaktträger-Band (8) mittels Widerstandserwärmung, wobei das Vormaterial als Metallband (1) mit Kontaktbereich (3) ausgebildet ist, welches einen Kernbereich (2) aus Nickel oder aus einer Kupfer-Nickel-Basis-Legierung aufweist und an seiner mit dem Kontaktträger-Band (8) verbindbaren Bandunterseite (4) eine Beschichtung (6) aus einem Werkstoff aufweist, der im wesentlichen aus Silber besteht, wobei der Schmelzpunkt des Werkstoffes der Beschichtung unterhalb des Schmelzpunkts des Metallbandes (1) liegt, dadurch gekennzeichnet, daß die Beschichtung (6) auf eine einzigen strangartigen Vorsprung (5) der Bandunterseite (4, 4') des Metallbandes (1, 1') wenigstens im Bereich von dessen Spitze aufgebracht ist, wobei das Verhältnis der Schichtdicke des aufgebrachten Werkstoffs der Beschichtung zu der vom Talboden der Bandunterseite bis zur Spitze des Vorsprungs gemessenen Höhe ein Verhältnis im Bereich von 1:2 bis 1:10 aufweist.
- Vormaterial nach Anspruch 1, dadurch gekennzeichnet, daß die Kupfer-Nickel-Basis-Legierung einen Nickel-Anteil im Bereich von 9 bis 70 Gewichts-% aufweist.
- Vormaterial nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Kupfer-Nickel-Basis-Legierung einen Zinn-Anteil im Bereich von 2 bis 10 Gewichts-% aufweist.
- Verfahren zur Herstellung eines Vormaterials nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Beschichtung (6) auf den durch Walzen erstellten Vorsprung (5) des Metallbandes (1) aufgebracht wird.
- Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß die Beschichtung durch galvanische Abscheidung aufgebracht wird.
- Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß die Beschichtung durch Vakuumbeschichtung aufgebracht wird.
- Verfahren zur Herstellung eines Vormaterials nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß die auf dem Vorsprung (5) befindliche Beschichtung (6) zusammen mit der als Kontaktbereich (3) vorgesehenen Beschichtung durch einen gemeinsamen Walzvorgang auf den Kernbereich (2) aufgebracht wird.
- Verfahren zur Herstellung eines Halbzeuges für elektrische Kontakte, bei dem auf ein Kontaktträger-Band (8), das im wesentlichen aus Kupfer besteht, ein mit Kontaktprofil versehenes Metallband (1) als Vormaterial gemäß Anspruch 1 mit seiner Bandunterseite (4) so aufgebracht wird, daß ein auf dieser Bandunterseite befindlicher Vorsprung (5) auf dem Kontaktträger-Band aufliegt und anschließend mittels eines Schmelzvorganges durch Widerstandserwärmung eine elektrische und mechanisch feste Verbindung zwischen dem Metallband (1) und dem Kontaktträger-Band (8) hergestellt wird, wozu zur Bildung der Silber-Kupfer-Legierung zwischen dem Metallband und dem Kontaktträger-Band der Silber-Anteil aus dem Metallband und der Kupfer-Anteil aus dem Kontaktträger-Band entnommen wird, dadurch gekennzeichnet, daß das Metallband auf das Kontaktträger-Band aufgebracht, die Beschichtung des Metallbandes mittels Widerstandserwärmung geschmolzen wird und die Beschichtung durch einen zwischen Metallband und Kontaktträgerband ausgeübten Druck von dem einzigen Vorsprung in dem Vorsprung benachbarte Rillen oder Vertiefungen (16, 17) abläuft und dort mit dem in die Rillen eindringenden Werkstoff des Kontaktträgerbandes eine Legierung bildet, die eine elektrisch leitende und mechanisch feste Verbindung sowohl mit dem Werkstoff des Metallbandes als auch mit dem Werkstoff des Kontaktträger-Bandes (8) eingeht, wobei die während der Widerstandserwärmung gebildete Legierung einen Schmelzpunkt aufweist, der dem des Eutektikums der Silber-Kupfer-Legierung entspricht oder sehr nahe liegt.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE29522396U DE29522396U1 (de) | 1995-02-09 | 1995-09-12 | Vormaterial zur Herstellung elektrischer Kontakte |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19504144 | 1995-02-09 | ||
DE19504144A DE19504144C2 (de) | 1995-02-09 | 1995-02-09 | Vormaterial und Verfahren zur Herstellung von Vormaterial und Halbzeug für elektrische Kontakte |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0726613A2 EP0726613A2 (de) | 1996-08-14 |
EP0726613A3 EP0726613A3 (de) | 1997-09-10 |
EP0726613B1 true EP0726613B1 (de) | 2000-03-01 |
Family
ID=7753464
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95114277A Revoked EP0726613B1 (de) | 1995-02-09 | 1995-09-12 | Vormaterial und Verfahren zur Herstellung von Vormaterial und Halbzeug für elektrische Kontakte |
Country Status (3)
Country | Link |
---|---|
US (1) | US5883352A (de) |
EP (1) | EP0726613B1 (de) |
DE (2) | DE19504144C2 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19748288A1 (de) * | 1997-10-31 | 1999-05-06 | Kloeckner Moeller Gmbh | Schaltkontaktstück für Niederspannungs-Schaltgeräte |
EP1387370A1 (de) * | 2002-08-03 | 2004-02-04 | INOVAN GmbH & Co. KG Metalle und Bauelemente | Bandförmiges Halbzeug |
DE102019104318C5 (de) * | 2019-02-20 | 2023-06-22 | Auto-Kabel Management Gmbh | Elektrischer Leiter sowie Verfahren zur Herstellung eines elektrischen Leiters |
Family Cites Families (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1155427A (en) * | 1914-11-20 | 1915-10-05 | Independent Lamp And Wire Company Inc | Contact bodies of tungsten. |
US2181083A (en) * | 1936-01-02 | 1939-11-21 | Metals & Controls Corp | Laminated contact |
US2281446A (en) * | 1937-01-07 | 1942-04-28 | Callite Tungsten Corp | Electrical contact |
US2688574A (en) * | 1951-12-06 | 1954-09-07 | Western Electric Co | Method of making bimetal contact tape |
US3191275A (en) * | 1961-09-26 | 1965-06-29 | Talon Inc | Method of making electrical contacts |
US3346350A (en) * | 1965-05-25 | 1967-10-10 | Engelhard Ind Inc | Electrical contact tape |
AU435640B2 (en) * | 1969-04-11 | 1973-05-14 | Chugai Electric Industrial Co. Ltd | A button type composite contact |
JPS54133450A (en) * | 1978-04-10 | 1979-10-17 | Hitachi Ltd | Diffusion bonding method for different kind metal |
DE2844888C2 (de) * | 1978-10-14 | 1983-02-24 | W.C. Heraeus Gmbh, 6450 Hanau | Vormaterial zur Herstellung elektrischer Kontakte |
JPS607157A (ja) * | 1983-06-25 | 1985-01-14 | Masami Kobayashi | Ic用リ−ドフレ−ム |
DE3866298D1 (de) * | 1987-07-22 | 1992-01-02 | Siemens Ag | Verfahren zum verbinden von werkstuecken durch widerstandserwaermung mittels eines kurzzeit-energieimpulses. |
ATE94684T1 (de) * | 1987-07-22 | 1993-10-15 | Siemens Ag | Kontakt zum hartloeten auf einem traeger mittels widerstandspressschweissung mittels eines kurzzeit-energieimpulses. |
JPH01151114A (ja) * | 1987-12-08 | 1989-06-13 | Tanaka Kikinzoku Kogyo Kk | 複合電気接点材料 |
DE4216224C2 (de) * | 1992-05-19 | 1994-03-17 | Heraeus Gmbh W C | Vormaterial und Halbzeug für elektrische Kontakte sowie Verfahren zur Herstellung |
-
1995
- 1995-02-09 DE DE19504144A patent/DE19504144C2/de not_active Expired - Fee Related
- 1995-09-12 EP EP95114277A patent/EP0726613B1/de not_active Revoked
- 1995-09-12 DE DE59507911T patent/DE59507911D1/de not_active Revoked
-
1996
- 1996-01-30 US US08/593,930 patent/US5883352A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE19504144C2 (de) | 1998-09-24 |
EP0726613A2 (de) | 1996-08-14 |
US5883352A (en) | 1999-03-16 |
EP0726613A3 (de) | 1997-09-10 |
DE59507911D1 (de) | 2000-04-06 |
DE19504144A1 (de) | 1996-08-22 |
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