Method and apparatus for conducting smut-free stud welding

Details Method and apparatus for conducting smut-free stud welding Method and apparatus for conducting smut-free stud welding

B - Operations, Transporting

23

K

327/56

B23K 11/32 (1980.01)

Patent

CA 1129502

ABSTRACT OF THE DISCLOSURE A method and apparatus for welding studs to a work- piece are provided. When the studs are welding to workpieces using a drawn-arc, studs welding technique, sometimes a coating of smut is deposited on the workpiece around the welded end of the stud. This coating detracts from the appearance of the stud and workpiece. Further, if the workpiece is to be covered with a coating material, the coating of smut must first be removed, resulting in an extra operation. It has been found that the coating of smut will not be deposited if, during the stud welding cycle, gas is directed toward the weld area in a swirling manner around the end of stud where the weld occurs.

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