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Method and apparatus for arc butt welding

  • US 4,273,986 A
  • Filed: 11/15/1979
  • Issued: 06/16/1981
  • Est. Priority Date: 11/15/1978
  • Status: Expired due to Term
First Claim
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1. A method of joining two parts by an arc butt welding process, comprising the steps of striking an arc between the two faces to be joined, moving the arc over the faces by means of a magnetic field, relatively moving the two faces in a plane generally parallel to the faces such that the overlapping area of the two faces changes during the arc-heating period, so that the magnetic field and the relative movement constrain the arc roots to move over substantially the whole of each face, and then bringing the faces into registration and applying forging pressure across the said faces.

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