Low electric D.C., low time rate polarity reversing arc welding

Details Low electric D.C., low time rate polarity reversing arc welding Low electric D.C., low time rate polarity reversing arc welding

1994-04-05

1995-11-14

Paschall, Mark H.

Electric heating

Metal heating

By arc

21912144, 2191305, 21912159, B23K 1000

Patent

active

054669057

ABSTRACT:
Direct electric current arc welding between an electrode and a workpiece surface is accomplished in the electric current range of about 0.5-45 amps while reversing the polarities between the electrode and the workpiece surface at a low frequency rate in the range of about 1-1000 cycles per second, in a series of polarity cycles. The workpiece surface, in at least some of the cycles, is positive for a time less than that surface is negative to result in anodic cleaning of the workpiece surface. If the arc is extinguished during a polarity reversal, the arc is maintained, for example, by restriking.

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