Method and apparatus for welding studs to workpieces

Details Method and apparatus for welding studs to workpieces Method and apparatus for welding studs to workpieces

B - Operations, Transporting

23

K

327/56

B23K 11/04 (2006.01)

Patent

CA 1079365

ABSTRACT OF THE DISCLOSURE A method and apparatus for welding studs to workpieces are provided. The invention is particularly concerned with welding studs to workpieces made of materials having relatively low electrical resistance but covered with layers of other materials having higher electrical resistance, a common example being metal workpieces having painted surfaces. In order for the stud to make effective electrical contact with the workpiece at the beginning of the welding cycle, the paint must be eliminated; in accordance with the invention, this is accomplished by rotating the stud which effectively removes the portion of the paint in contact with the stud. Electrical contact can then be established between the stud and the workpiece to enable the welding cycle to be initiated.

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