Method and apparatus for metal arc welding

Details Method and apparatus for metal arc welding Method and apparatus for metal arc welding

B - Operations, Transporting

23

K

327/67, 327/71

B23K 9/09 (2006.01) G05F 1/08 (2006.01)

Patent

CA 1209647

ABSTRACT The invention relates to a process and an apparatus for metal arc welding with a consumable electrode. A pul- sating 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.

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