Arc sensing method in automated welding

Details Arc sensing method in automated welding Arc sensing method in automated welding

1997-02-28

1998-07-14

Shaw, Clifford C.

Electric heating

Metal heating

By arc

21912512, B23K 9127

Patent

active

057808082

ABSTRACT:
An arc sensing method in an automated welding process for accurately adjusting a position of a weaving center of a welding torch with respect to a welding center line on the basis of a change in an arc current according to the change in distance between a lower end of the welding torch and a welding surface during weaving of the welding torch, is disclosed. The arc sensing method is accomplished by detecting the position of the weaving center of the welding torch with respect to the welding center line using the differential value of the arc current. Therefore, the position of the weaving center of the welding torch is accurately determined regardless of the degree of inclination of welding surfaces or the position of the base metals with respect to the welding torch. Accordingly, welding in a state in which the welding torch is off-center from the welding center line can be prevented.

REFERENCES:
patent: 4485291 (1984-11-01), Nomura et al.
patent: 4587398 (1986-05-01), Sarugaku et al.
patent: 4988201 (1991-01-01), Sugitani et al.

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