Spot resistance-welding electrode; contact tip for such an electrode; machine for exchanging these tips

  • US 5,387,774 A
  • Filed: 12/21/1992
  • Issued: 02/07/1995
  • Est. Priority Date: 12/20/1991
  • Status: Expired due to Fees
First Claim
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1. A spot resistance-welding electrode comprising:

  • an electrode body mounted on a support arm and connected to a high intensity welding current source as well as to a cooling water supply circuit,a welding cap securely fastened to an end of said body, said cap havinga consumable contact tip which ensures contact with metal sheets to be welded and which transmits to the sheets a welding current pressure and welding current intensity, wherein said contact tip of the welding cap is a distinct component of the cap which is replaceable after said contact tip is consumed, said contact tip including a helical deflecting peg which is centrally and internally located therein,a brazing which connects said cap to said tip, said brazing having been produced, and later during replacement of the contact tip capable of being destroyed, by passing a current necessary for melting a brazing material located between said contact tip and a remainder of said welding cap from the welding current source.

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