Method and apparatus of submerged arc welding with electrodes in

Details Method and apparatus of submerged arc welding with electrodes in Method and apparatus of submerged arc welding with electrodes in

1990-11-15

1992-08-18

Shaw, Clifford C.

Electric heating

Metal heating

By arc

219 61, 219 73, B23K 918

Patent

active

051401401

ABSTRACT:
A method and apparatus for submerged arc welding using five-electrodes having direct current (DC) connected to one electrode and alternating current (AC) connected to the other four electrodes. The electrodes are aligned in a row with predetermined angles to the direction of the weld. Alternating current is supplied to the electrodes so that a 90.degree. phase difference is applied to adjacent electrodes and a 180.degree. phase difference is applied between alternating electrodes. With such power application and the electrical connections of the electrodes, the welding process has a more stable weld puddle that suppresses welding defects at higher speeds than previously achievable.

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