Pulse arc welding machine

Details Pulse arc welding machine Pulse arc welding machine

1983-09-22

1986-06-10

Shaw, Clifford C.

Electric heating

Metal heating

By arc

21913021, 21913051, B23K 909

Patent

active

045944989

ABSTRACT:
A pulse arc welding machine in which the welding operations and welding current are controlled such that the molten portion of a wire electrode is not significantly splattered and the welding arc length and welding bead are uniform. The welding machine of the invention includes a wire electrode, a welding torch confronting a base material while being spaced therefrom, a shielding gas supplying unit for supplying a shielding gas to the welding area on the base material, and a wire feeding unit for feeding the wire electrode to the welding torch. A base current source supplies a base current between the wire electrode and base material with a pulse current from a pulse current source being imposed thereon. A pulse frequency varying circuit varies a number of pulses per unit time for the pulse current so that the number of pulses is proportional to the speed at which the wire electrode is fed thereby to set the average arc current.

REFERENCES:
patent: 2784349 (1957-03-01), Anderson
patent: 3528100 (1970-09-01), Budy
patent: 3851137 (1974-11-01), Verhagen et al.
patent: 3906184 (1975-09-01), Gibbs et al.

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