JPS54136552A - Consumable electrode type three ogammalock automatic welding method - Google Patents

Abstract

PURPOSE: To increase the amount of weld metal per unit time, and to prevent the slag inclusion, by restricting the feed angle and the aim position of the welding wire against the groove, and by restricting the speed of reciprocal motion of the welding torch and the arcing current, and by proceeding the welding work while restraining the flow out of the molten metal.

CONSTITUTION: The welding torch 7 is held as follows; the angle α of the welding wire 8 against the groove face of the lower parent metal 2 is settled at 5W20 degrees, the angle β against the surface of parent metal sheet is settled at under 30 degrees, and the distance (a) between the position of the tip of welding wire and the face of the groove of the lower parent metal 2 is settled at 0.5W4mm. And the welding torch 7 is reciprocally moved in the direction of thickness keeping above stated positional relations. The reciprocal motion of the welding torch is carried out at a speed 50W200cm/min, and is stopped at both end positions of the reciprocal motion for a period respectively specified for each end, and this procedure is repeated. The arcing current is always supplied with about 350A, and the welding is proceeded without interrupting the arc.

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