EP1846987A1 - Contact electrique et procede de fabrication associe - Google Patents

Contact electrique et procede de fabrication associe

Info

Publication number
EP1846987A1
EP1846987A1 EP06708049A EP06708049A EP1846987A1 EP 1846987 A1 EP1846987 A1 EP 1846987A1 EP 06708049 A EP06708049 A EP 06708049A EP 06708049 A EP06708049 A EP 06708049A EP 1846987 A1 EP1846987 A1 EP 1846987A1
Authority
EP
European Patent Office
Prior art keywords
electrical contact
particles
coating
galvanic bath
nickel
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Withdrawn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
EP06708049A
Other languages
German (de)
English (en)
Inventor
Silvan Hippchen
Christian Lang
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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 Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP1846987A1 publication Critical patent/EP1846987A1/fr
Withdrawn legal-status Critical Current

Links

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
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/02—Contact members
    • H01R13/03—Contact members characterised by the material, e.g. plating, or coating materials
    • 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
    • H01R43/16—Apparatus or processes specially adapted for manufacturing, assembling, maintaining, or repairing of line connectors or current collectors or for joining electric conductors for manufacturing contact members, e.g. by punching and by bending
    • 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
    • H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands

Definitions

  • the invention relates to an electrical contact and a method for producing the same according to the preamble of the independent claims.
  • a suitable pretreatment of the surface is provided at least one of the two joining partners.
  • a limitation of the joining forces is achieved by a corresponding lubricating effect or reduction of the coefficient of friction between the joining partners, wherein the state of the surface should be as defined as possible and reproducible. This is a prerequisite for ensuring a positive and non-positive connection as well as a successful process control (force-distance monitoring).
  • a disadvantage of tin coatings is that chips are formed systematically in the clamping area when joining the corresponding joining partners, which can lead to short circuits in the subsequent application.
  • the application of a chemical surface treatment involves the risk that chemical substances are being carried off and it can be strong Are subject to process fluctuations. This also makes a process control difficult.
  • the object of the present invention is to propose an electrical contact or a cost-effective coating method for its production, which enables reliable application of the cold-contacting technique.
  • the electrical contact according to the invention or the method for its production with the characterizing features of the independent claims has the advantage that in a simple and cost-effective manner, a modification of the surface of the electrical contact can be achieved, which is suitable for a reliable application of the cold bonding technique.
  • the contact surface in particular one
  • Coating formed from a dispersion of particles of carbon and / or a polymer in a metal The particles embedded in the metallic matrix act as a lubricant, which makes the surface of the coated electrical contact lubricious.
  • Particularly advantageous is the use of a copper or nickel-containing metal as a metallic matrix for incorporation of the particles, since these
  • the coating of the electrical contact is galvanic, wherein the galvanic bath carbon particles are added.
  • the coating of the contact surface can be carried out inexpensively and largely free of process fluctuations.
  • the galvanic bath used for the coating contains surfactants, since in this way an agglomeration of the dispersed in the galvanic bath Particles can be avoided. In this way, a reproducible incorporation of the particles is ensured in the metallic structure of the coating.
  • FIG. 1a schematically shows an application of the cold contacting technique with joining partners according to the prior art
  • FIG. 1b schematically shows an application of the cold contacting technique with joining partners according to the present invention
  • FIG. 2 shows a cutting space through a coated surface of an electrical contact according to the invention.
  • the electrical contact according to the present invention has, at least in its contact region, a coating which comprises a metallic matrix in which particles of carbon and / or a polymer are incorporated.
  • the main constituent of this particle-containing, metallic dispersion layer is in particular copper and / or nickel, since these metals form sufficiently hard and corrosion-resistant coatings; however, silver-based coatings may also be used.
  • the coating may include alloys of said metals with each other or with other metallic components. If a silver-containing coating is considered, then when applying the contact as an insulation displacement connection both joining partners should be provided with a silver-containing coating.
  • carbon particles in particular graphite particles are suitable because they show a good lubricating effect.
  • carbon black in particular furnace black
  • polymer particles in particular particles of polytetrafluoroethylene (PTFE) are suitable; the use of particles of silicone or perfluorosilicone is also conceivable.
  • the particles preferably have an average diameter of up to 4 ⁇ m, in particular from 1 to 3.5 ⁇ m.
  • the particles are contained in the coating, for example, to 0.4 to 2.5 wt.%. - A -
  • the coating of the surface of the electrical contact is preferably carried out galvanically.
  • the particles intended for storage in the resulting metallic layer are added to the galvanic bath and dispersed.
  • the electrical contact to be coated is immersed in the galvanic bath and contacted as a cathode.
  • the galvanic bath contains a suitable copper or nickel electrolyte, for example based on corresponding metal cyanides.
  • a suitable copper or nickel electrolyte for example based on corresponding metal cyanides.
  • Exemplary compositions of plating baths for copper or nickel deposition are given below:
  • Free potassium cyanide content 20 g / l
  • the plating bath is preferably operated during deposition of the coating at a working temperature of 20 to 60 0 C, preferably at 40 0 C for the deposition of copper or at 50 0 C for the deposition of nickel. Furthermore, during the deposition, a current density of about 1-2 A / dm 2 is maintained in the deposition of copper and about 3 A / dm 2 in the deposition of nickel.
  • the galvanic bath is agitated, for example by stirring or suitable recycling of the electrolyte.
  • the electrical contact is preferably subjected to a pretreatment before the coating.
  • at least the surface of the electrical contact to be coated for example, first subjected to degreasing, preferably electrolytically at a temperature of about 50 to 70 0 C, in particular at 60 0 C and a current density of about 2 to 5
  • a / dm 2 in particular at 3 A / dm 2 is carried out for about 5 minutes.
  • the degreased surface is then preferably subjected to a one-minute rinse with demineralized water.
  • activation of the surface to be coated can then follow. For example, it is exposed to a 5% sulfuric acid solution at room temperature for, for example, 2 minutes. The surface to be coated is then rinsed again. The thus pretreated surface of the electrical contact to be coated is then subjected to the actual coating.
  • the coated electrical contact As a post-treatment of the coated electrical contact this can first be rinsed again, followed by a one-minute hot rinse in demineralized water at 70 to 95 0 C, in particular at 90 0 C can follow. Finally, the coated electrical contact is subjected to drying at 60 ° C., preferably for 2 minutes in a drying oven.
  • the electrical contact is preferably designed as a plug contact.
  • Kaltcardiertechnik takes place a compression of the two joining partners, for example in the form of an insulation displacement connection or by press-fitting. This procedure is graphically illustrated in the figures Ia and Ib. If, as illustrated in FIG. 1 a, a pin 12 is inserted into a clamp or sleeve 14 which has a coating 15 according to the prior art, then a chip 16 may form, which may possibly lead to a short circuit. If, on the other hand, the sleeve 14 is provided with a coating 15a according to the present invention, then, as shown in FIG. 1b, it does not occur
  • FIG. 2 shows a transverse section through an electrical contact coated with a carbon-containing copper layer. It can be seen that the coating 15a contains embedded carbon particles 18.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Electroplating Methods And Accessories (AREA)

Abstract

L'invention concerne un contact électrique en technique de contact à froid, ce contact comportant un support métallique (14) pourvu d'une couche (15a) constituée par une dispersion de particules (18) de carbone et/ou d'un polymère dans un métal.
EP06708049A 2005-02-04 2006-02-06 Contact electrique et procede de fabrication associe Withdrawn EP1846987A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE200510005127 DE102005005127A1 (de) 2005-02-04 2005-02-04 Elektrischer Kontakt und Verfahren zu dessen Herstellung
PCT/EP2006/050702 WO2006082248A1 (fr) 2005-02-04 2006-02-06 Contact électrique et procédé de fabrication associé

Publications (1)

Publication Number Publication Date
EP1846987A1 true EP1846987A1 (fr) 2007-10-24

Family

ID=36368468

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06708049A Withdrawn EP1846987A1 (fr) 2005-02-04 2006-02-06 Contact electrique et procede de fabrication associe

Country Status (3)

Country Link
EP (1) EP1846987A1 (fr)
DE (1) DE102005005127A1 (fr)
WO (1) WO2006082248A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5163340B2 (ja) * 2008-07-25 2013-03-13 富士通株式会社 コネクタ構造、プラグコネクタ及び電子機器
DE102009047043A1 (de) 2009-10-19 2011-04-21 Robert Bosch Gmbh Lötfreie elektrische Verbindung

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5141702A (en) * 1990-03-13 1992-08-25 Olin Corporation Method of making coated electrical connectors
US5235743A (en) * 1990-07-11 1993-08-17 Yazaki Corporation Method of manufacturing a pair of terminals having a low friction material on a mating surface to facilitate connection of the terminals
EP1369504A1 (fr) * 2002-06-05 2003-12-10 Hille & Müller Bande métallique pour la production des composants pour des connecteurs électriques

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2006082248A1 *

Also Published As

Publication number Publication date
WO2006082248A1 (fr) 2006-08-10
DE102005005127A1 (de) 2006-08-10

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