Method and apparatus for metal arc welding with constant current

Details Method and apparatus for metal arc welding with constant current Method and apparatus for metal arc welding with constant current

1983-05-20

1985-02-05

Shaw, Clifford C.

Electric heating

Metal heating

By arc

21913051, 21913031, B23K 909

Patent

active

044979975

ABSTRACT:
The invention relates to a process and an apparatus for metal arc welding with a consumable electrode. A pulsating current is supplied to the electrode from a constant current source. During the interpulse periods between pulses there flows a minimum current which is at least sufficient to maintain the arc. The switch from pulse current to interpulse current occurs as a function of the arc voltage, with switching to pulse current occurring if a minimum voltage is detected and to interpulse current occurring if a maximum voltage is detected. Compared with conventional metal arc welding with a consumable electrode, this method offers the advantage of a better welding quality.

REFERENCES:
patent: 4201906 (1980-05-01), Puschner
patent: 4301355 (1981-11-01), Kimbrough et al.
patent: 4409465 (1983-10-01), Yamamoto et al.
patent: 4427874 (1984-01-01), Tabata et al.

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