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

1980-02-22

1981-12-15

Kozma, Thomas J.

Electric heating

Metal heating

For bonding with pressure

219 98, 219 75, 219121PP, B23K 920

Patent

active

043061370

ABSTRACT:
A method and apparatus for welding studs to a workpiece are provided. When the studs are welded to workpieces using a drawn-arc, stud 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.

REFERENCES:
patent: 2790066 (1957-04-01), Haynes et al.
patent: 3096429 (1963-07-01), Mowry et al.
patent: 3363084 (1968-01-01), Busing
patent: 3495066 (1970-02-01), Broyard et al.
patent: 3676640 (1972-07-01), Bernard et al.
patent: 3736401 (1973-05-01), Shoup
patent: 3790740 (1974-02-01), Shoup
patent: 4201904 (1980-05-01), Weidman

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