EP0171339B1 - Verfahren zur Herstellung von elektrischen Kontakten - Google Patents

Verfahren zur Herstellung von elektrischen Kontakten Download PDF

Info

Publication number
EP0171339B1
EP0171339B1 EP85420134A EP85420134A EP0171339B1 EP 0171339 B1 EP0171339 B1 EP 0171339B1 EP 85420134 A EP85420134 A EP 85420134A EP 85420134 A EP85420134 A EP 85420134A EP 0171339 B1 EP0171339 B1 EP 0171339B1
Authority
EP
European Patent Office
Prior art keywords
metal
carbon
substrate
fibres
alloy
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.)
Expired
Application number
EP85420134A
Other languages
English (en)
French (fr)
Other versions
EP0171339A1 (de
Inventor
Paul Reille
Dominique Berger
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.)
Mersen SA
Original Assignee
Carbone Lorraine SA
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=9306600&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0171339(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Carbone Lorraine SA filed Critical Carbone Lorraine SA
Priority to AT85420134T priority Critical patent/ATE38738T1/de
Publication of EP0171339A1 publication Critical patent/EP0171339A1/de
Application granted granted Critical
Publication of EP0171339B1 publication Critical patent/EP0171339B1/de
Expired legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/02—Contacts characterised by the material thereof
    • H01H1/021—Composite material
    • H01H1/027—Composite material containing carbon particles or fibres

Definitions

  • the present invention relates to a method for manufacturing electrical contacts made of metal or metal alloy and carbon fibers.
  • This process has the major drawback of being difficult to implement.
  • the duration of the soaking must be well defined so as not to transform all the carbon into carbide, and one cannot obtain contacts consisting solely of the chosen metal and of carbon wires.
  • the carbon wires are aligned in a preferential direction, that is to say in general perpendicular to the contact surface, so as to reduce the wear by the arc which forms during switching operations.
  • Another drawback is that it requires an expensive and bulky device for compression.
  • One of the aims of the invention is to overcome the drawbacks which the methods described present.
  • This process also makes it possible to use carbon fibers of relatively large length at the start of the order of 30 to 50 mm.
  • the metal or metal alloy is chosen from those which are good conductors of electricity and which do not react with carbon at the melting temperature of the metal.
  • metal or alloy can be dictated by reasons of economy and / or abundance of the metal.
  • copper and its alloys can be used which, for good contact performance, have the advantage of being more economical and more abundant than silver.
  • the carbon fiber substrate can consist of loose fibers or preferably a felt.
  • carbon fibers are also understood to mean graphite fibers.
  • the percentage of carbon in the final product is obtained by varying the density of the fiber substrate. This density can vary from 0.05 to 1, the rate of metal or alloy therefore varies from 97.5% to 45% by volume.
  • 80 g of carbonized viscose fibers with a diameter of 10 ⁇ m and a length of 50 mm are compacted in the form of a felt with a diameter of 80 mm and a thickness of 80 mm.
  • This felt is impregnated with molten copper, at 1100 ° C. under a pressure of (5 bars) 5.10 + 5 Pa.
  • the billet obtained contains 87% by volume of copper and its examination shows that the carbon fibers have retained their length (approximately 50 mm) and their random orientation after impregnation.
  • This billet is then hot-spun at 850 ° C through a circular section of 12 mm diameter.
  • the bar is finally cut perpendicular to the axis of the spinning in discs of thickness 1 mm.
  • the discs obtained were used as covering contacts. It has been found that their performance relative to their cost price is such that they can advantageously replace the silver-cadmium oxide contacts despite a shorter lifespan.
  • Example 2 This example is a variant of Example 1: copper is replaced by one of its alloys with chromium and zirconium. The percentages by weight are as follows:
  • the fiber substrate used is the same as in Example 1.
  • the felt is impregnated with the Cu-Cr-Zrfondu alloy, at 1050 ° C., under a pressure of (5 bar) 5.10 + 5 Pa.
  • the billet obtained contains 84.5% by volume of Cu-Cr-Zr alloy.
  • This billet is then hot-spun at 820 ° through a die of square section 12 x 12 mm.
  • the bar obtained consists of a rectangular section 12 x 12 mm and a length of 2.8 m which is cut into slices 1 mm thick which are used as opening contacts.
  • Example 2 All the observations indicated in Example 1 are applicable to Example 2.
  • This example is a variant of Example 2.
  • the Cu-Cr-Zr alloy after quenching and tempering, sees its mechanical properties markedly increased.
  • the bar obtained is heated to 1000 ° C, then quenched with water and annealed at 475 ° C.
  • Example 2 This example is a variant of Example 1: copper is replaced by silver.
  • the fiber substrate used is the same as in Example 1.
  • the felt is impregnated with molten silver, at 1000 ° C., under a pressure of (5 bars) 5.10 + 5 Pa.
  • the billet obtained contains 83% by volume of silver.
  • the billet is then hot-spun at 780 ° C in the same die.
  • the bar obtained consists of a cylinder with a diameter of 12 mm and a length of 3 m which is cut into discs 1 mm thick which are used as contacts.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Composite Materials (AREA)
  • Materials Engineering (AREA)
  • Contacts (AREA)
  • Manufacture Of Switches (AREA)
  • Conductive Materials (AREA)
  • Manufacturing Of Electrical Connectors (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Coupling Device And Connection With Printed Circuit (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)

Claims (4)

1. Verfahren zur Herstellüng eines elektrischen Kontakts, der aus einem Substrat aus Kohlenstoffasern geringen Durchmessers besteht, die nach einer Vorzugsrichtung ausgerichtet und mit einem Metall oder einer Metallegierung guter Leitfähigkeit des elektrischen Stroms imprägniert werden, dadurch gekennzeichnet, dass die das Substrat bildenden Kohlenstoffasern einen Durchmesser im Bereich von 2 bis 50 µm haben und dass man nach Imprägnierung unter Druck mit einem Metall oder einer Legierung, das bzw. die mit dem Kohlenstoff nicht reagiert, ein Warmstrangpressen des so erhaltenen Materials durchführt.
2. Verfahren nach dem Anspruch 1, dadurch gekennzeichnet, dass das Metall oder die Metallegierung unter dem Kupfer und seinen Legierungen, dem Silber und seinen Legierungen und dem Cadmium gewähltwird.
3. Verfahren nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass das Kohlenstoffasersubstrat aus losen Fasern oder aus einem Faserfilz gebildet wird.
4. Verfahren nach irgendeinem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Kohlenstoffasern des Substrats eine Anfangslänge von einigen mm bis zu einigen cm haben und durch das Strangpressen in Bruchstücke von 15 bis 150 um unterteilt werden.
EP85420134A 1984-07-25 1985-07-22 Verfahren zur Herstellung von elektrischen Kontakten Expired EP0171339B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85420134T ATE38738T1 (de) 1984-07-25 1985-07-22 Verfahren zur herstellung von elektrischen kontakten.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8412036A FR2568417B1 (fr) 1984-07-25 1984-07-25 Procede de fabrication de contacts electriques et contacts obtenus.
FR8412036 1984-07-25

Publications (2)

Publication Number Publication Date
EP0171339A1 EP0171339A1 (de) 1986-02-12
EP0171339B1 true EP0171339B1 (de) 1988-11-17

Family

ID=9306600

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85420134A Expired EP0171339B1 (de) 1984-07-25 1985-07-22 Verfahren zur Herstellung von elektrischen Kontakten

Country Status (5)

Country Link
EP (1) EP0171339B1 (de)
JP (1) JPS61107676A (de)
AT (1) ATE38738T1 (de)
DE (1) DE3566323D1 (de)
FR (1) FR2568417B1 (de)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0628372Y2 (ja) * 1986-09-30 1994-08-03 三菱自動車工業株式会社 自動車のハンドルサポ−ト構造
FR2615046B1 (fr) * 1987-05-04 1992-12-31 Merlin Gerin Materiau composite fritte pour contact electrique et pastille de contact utilisant ledit materiau
DE3806573A1 (de) * 1988-03-01 1989-09-14 Siemens Ag Kontaktpaar
FR2731106A1 (fr) * 1995-02-27 1996-08-30 Schneider Electric Sa Procede de fabrication d'un materiau de contact electrique composite
EP2179976A1 (de) * 2003-05-16 2010-04-28 Hitachi Metals, Ltd. Verbundwerkstoff mit hoher Wärmeleitfähigkeit und niedrigem Wärmeausdehnungskoeffizienten, und Wärmesenke.
FR2877763B1 (fr) 2004-11-08 2007-03-16 Schneider Electric Ind Sas Pastille de contact destinee a un contact electrique mobile de disjoncteur, contact electrique mobile possedant une telle pastille et disjoncteur comportant un tel contact
KR101170397B1 (ko) * 2005-03-29 2012-08-01 히타치 긴조쿠 가부시키가이샤 고열전도성 흑연 입자 분산형 복합체 및 그 제조 방법
JP5342315B2 (ja) * 2009-04-24 2013-11-13 パナソニック株式会社 信号用電気接続端子装置及びその製造方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3254189A (en) * 1961-05-15 1966-05-31 Westinghouse Electric Corp Electrical contact members having a plurality of refractory metal fibers embedded therein
DE2057618A1 (de) * 1970-11-24 1972-06-15 Duerrwaechter E Dr Doduco Metall-Kohlenstoff-Verbundwerkstoff und Verfahren zu seiner Herstellung
DE2250810B2 (de) * 1972-10-17 1976-04-08 Fa. G. Rau, 7530 Pforzheim Kontaktstueck, insbesondere kontaktniet, und herstellungsverfahren hierzu
US4127700A (en) * 1973-10-12 1978-11-28 G. Rau Metallic material with additives embedded therein and method for producing the same
JPS5945743B2 (ja) * 1976-04-19 1984-11-08 田中貴金属工業株式会社 Ａｇ基複合電気接点素材の製造法

Also Published As

Publication number Publication date
DE3566323D1 (en) 1988-12-22
FR2568417A1 (fr) 1986-01-31
JPS61107676A (ja) 1986-05-26
EP0171339A1 (de) 1986-02-12
ATE38738T1 (de) 1988-12-15
FR2568417B1 (fr) 1986-11-28

Similar Documents

Publication Publication Date Title
KR100868008B1 (ko) 스파크 침식절삭용 와이어전극
EP0171339B1 (de) Verfahren zur Herstellung von elektrischen Kontakten
WO2003053621A2 (fr) Fil pour electroerosion a grande vitesse d'usinage
FR2679806A1 (fr) Electrode en alliage de cuivre a hautes performances pour usinage par electroerosion et procede de fabrication.
EP2681812B2 (de) Kontakt bürste
FR2683086A1 (fr) Procede de fabrication d'un conducteur souple supraconducteur a haute temperature critique.
EP1717020B1 (de) Kabel mit Innenleiter aus Aluminium
WO1986006871A1 (fr) Nouveaux alliages dotes de performances electriques et mecaniques elevees, leur fabrication et leurs applications, en particulier, dans les domaines electrique, electronique et connectique
FR3011251A1 (fr) Alliage d'aluminium a conductivite electrique elevee
EP0004824B1 (de) Messerkontakt und Verfahren zum Aufbringen einer Nickelschicht auf ein Aluminiumstück
CN1219090C (zh) 一种长寿命自润滑银基电接触材料
EP0072306B1 (de) Verfahren zur Herstellung eines Verbundmaterials in dem glasartige Kohlenstoffteilchen in einem anorganischen Grundmaterial verteilt sind, nach diesem Verfahren hergestelltes Material und dessen Anwendung als elektrischer Kontakt
US7598832B2 (en) Contact pad designed for a movable electrical contact of a circuit breaker, movable electrical contact having such a pad and circuit breaker comprising such a contact
EP0290311A1 (de) Sinterverbundmaterial für elektrische Kontakte und Kontaktpastille mit Anwendung des genannten Materials
CH646083A5 (en) Wire electrode for erosive electrical discharge machining
EP0794026A1 (de) Verfahren zur Herstellung eines Verbunddrahtes mit geringem Durchmesser, insbesondere eine Drahtelektrode für Funkenerodierbearbeitung und damit hergestellte Drahtelektrode
CA2426702C (fr) Buse isolante pour disjoncteur a soufflage d'arc
EP0729162B1 (de) Herstellungsverfahren eines elektrischen Verbundkontaktmaterials
FR2655206A1 (fr) Materiau composite fritte pour contact electrique, et pastille de contact utilisant ledit materiau.
EP2015316A2 (de) Elektrischer Signalübertragungsdraht für die Luft- und Raumfahrtindustrie
EP0011811B1 (de) Elektrischer Leiter mit einer gegenüber einer Temperatur über 250 Grad C beständigen Isolation und Verfahren zur Herstellung dieses Leiters
FR3125353A1 (fr) Câble haute tension a ame composite pour basse temperature d’exploitation
FR2673492A1 (fr) Electrode en alliage refractaire hautement allie et appareil de generation d'onde de pression en comportant application.
JPS5850306B2 (ja) 接点材料

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE GB IT LI NL SE

17P Request for examination filed

Effective date: 19860226

17Q First examination report despatched

Effective date: 19880104

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE GB IT LI NL SE

REF Corresponds to:

Ref document number: 38738

Country of ref document: AT

Date of ref document: 19881215

Kind code of ref document: T

ITF It: translation for a ep patent filed

Owner name: ING. A. GIAMBROCONO & C. S.R.L.

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
REF Corresponds to:

Ref document number: 3566323

Country of ref document: DE

Date of ref document: 19881222

PLBI Opposition filed

Free format text: ORIGINAL CODE: 0009260

26 Opposition filed

Opponent name: DODUCO GMBH & CO. DR.EUGEN DUERRWAECHTER

Effective date: 19890817

NLR1 Nl: opposition has been filed with the epo

Opponent name: DODUCO GMBH & CO. DR. EUGEN DUERRWAECHTER

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19900616

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19910614

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19910624

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19910625

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19910627

Year of fee payment: 7

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19910731

Year of fee payment: 7

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19910802

Year of fee payment: 7

RDAG Patent revoked

Free format text: ORIGINAL CODE: 0009271

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: PATENT REVOKED

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

27W Patent revoked

Effective date: 19910503

GBPR Gb: patent revoked under art. 102 of the ep convention designating the uk as contracting state
NLR2 Nl: decision of opposition
BERE Be: lapsed

Owner name: LE CARBONE LORRAINE

Effective date: 19920731

EUG Se: european patent has lapsed

Ref document number: 85420134.0

Effective date: 19911016