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MAGNETARC WELDING METHOD FOR WORKPIECES WITH OPEN CROSS-SECTIONS

  • US 20090294425A1
  • Filed: 06/01/2009
  • Published: 12/03/2009
  • Est. Priority Date: 06/03/2008
  • Status: Active Grant
First Claim
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1. A method for welding metallic workpieces wherein at least one of the workpieces to be welded has an open cross-section, comprising the steps of:

  • moving the workpieces together wherein the open cross-section of the one workpiece is bridged by a metallic auxiliary part to form a conducting closed region;

    activating a magnetic field of a magnet coil system and obtaining a current required for welding;

    placing the workpieces with a defined spacing and igniting an electric arc wherein the magnetic field of the magnet coil system sets the electric arc in rotation, and end surfaces of the workpieces to be welded are uniformly heated; and

    thereafter pressing the end surfaces of the workpieces against one another, wherein an open surface region of the metallic auxiliary part is not pressed, or pressed only very lightly, against the opposite surface of the workpiece having an open cross-section.

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