Automatic arc-welding method

Details Automatic arc-welding method Automatic arc-welding method

1988-07-14

1989-03-28

Shaw, Clifford C.

Electric heating

Metal heating

By arc

21912422, 21913021, 21913771, B23K 912

Patent

active

048166405

ABSTRACT:
An automatic arc-welding method, which comprises, when welding two objects to be welded together by means of a welding wire along a first groove formed between the objects to be welded on a first side thereof, continuously determining by calculation a target welding current, with which a depth of penetration agrees with a target value thereof, on the basis of the root gap, the material of the welding wire and the like; continuously determining by calculation a target feeding rate of the welding wire, at which an extension length of the welding wire agrees with a target value thereof, on the basis of the welding current, the material of the welding wire and the like; continuously determining by calculation a target welding speed, at which a height of the weld bead agrees with a target value thereof, on the basis of the feeding rate of the welding wire, the material of the welding wire, the root gap and the like; and on the other hand, when welding the objects to be welded together by means of the welding wire along a second groove formed on a second side of the objects to be welded, opposite to the first groove, continuously determining by calculation a target welding current and a target welding speed while taking into consideration the depth of penetration and the weld bead in the first groove; thereby automatically controlling the welding current, the feeding rate of the welding wire and the welding speed on the basis of the respective target values thus determined.

REFERENCES:
patent: 4532404 (1985-07-01), Boillot et al.
patent: 4591689 (1986-05-01), Brown et al.
patent: 4733051 (1988-03-01), Nadeau et al.

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