Method for welding by magnetically driven arc

Details Method for welding by magnetically driven arc Method for welding by magnetically driven arc

1983-04-15

1985-04-16

Envall, Jr., Roy N.

Electric heating

Metal heating

By arc

219100, B23K 908

Patent

active

045117845

ABSTRACT:
A method for welding by a magnetically driven arc, which comprises placing two objects of welding in butt formation with a small gap between the end edges thereof to form a welding line; parallelly connecting a first electric circuit comprising the two objects of welding and a cable arranged on the surface side of the two objects of welding and a second electric circuit comprising the two objects of welding and another cable arranged on the back side of the two objects of welding to a welding power source; flowing a welding current through the first and second electric circuits to produce an arc in the small gap; moving the arc along the welding line under the effect of an electromagnetic force in the direction of the welding line, the electromagnetic force being produced by the magnetic flux of magnetizing coils provided near the end edges of the two objects of welding and welding current flowing through the arc; and changing the amount of welding current flowing through the first and second electric circuits to control the electromagnetic force in the thickness direction of the two objects of welding; thereby continuously moving the arc in the thickness direction of the two objects of welding, thus uniformly heating the end edge of the two objects of welding to a welding temperature by the heat of the moving arc.

REFERENCES:
patent: 3102946 (1963-09-01), Fonberg
patent: 3940641 (1976-02-01), Dooley
patent: 4273986 (1981-06-01), Edson et al.

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