Method and apparatus for conducting smut-free welding

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

B - Operations, Transporting

23

K

327/56

B23K 9/20 (2006.01) B23K 9/16 (2006.01)

Patent

CA 1162991

ABSTRACT OF THE DISCLOSURE Method and apparatus for welding studs to a work- piece are provided. When studs are welded to workpieces using a drawn-aro, stud-welding technique, a coating of smut is sometimes deposited on the workpiece around the welded end of the stud. This coating detracts from the appearance and if the workpiece is covered with coating material, such as paint, the smut must first be removed, requiring an extra operation. It has been found that the coating of smut will not be depos- ited, if, during the welding cycle, fluid is carefully deposited on the weld area around the end of the stud where the weld occurs. This fluid consists of a small volume of low pressure air and an anti-smut liquid.

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