JPS54112754A - Controlling method for arc of hot wire type welding - Google Patents

Abstract

PURPOSE: To make obtainable the good weld zone even in the groove whose gap is so narrow that the conventional metod can not be emplyed, by operating so as to oscillate the position of the welding wire, in the hot wire type welding for the narrow gap.

CONSTITUTION: When the position of the feed tip of the wire 2 in the arc 3 of TIG electrode 1 shifts from the center to the left, the welding arc shifts to the right owing to the influence of the magnetism generating from the wire 2 in the welding con- dition, and then, the weld metal 5b is obtained; on the contrary, by the shift to the right, the weld metal 5c is obtained, and when the tip of wire 2 is at the centr, the weld metal 5a is obtained. By the operation for substituting the tip wire 2 to the positions of bilateral symmetry, the laterally wide weld metal 5d is obtained. By laterally shifting with the oscillator the thin wire 2 within narrow gap walls 6a, 6b, where the motion of the conventional welding torch is difficult, the good welding free from the lack of penetration becomes possible.

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