CONSUMABLE ELECTRODE TYPE GAS SHIELDED ARC WELDING METHOD

摘要

PURPOSE:To improve welding efficiency and to obtain satisfactory beads by performing welding with a consumable electrode type gas shielded arc torch while heating the weld zone of base metal to a specific temp. by a TIG electrode. CONSTITUTION:The surface in the weld zone of base metal 5 is heated to 400- 600 deg.C while a TIG welding torch is weaved and moved just in front of a consumable electrode at the same speed as the speed of the consumable electrode in the stage of welding said weld zone by using a consumable electrode type gas shielded arc torch 4. Welding is then performed with the consumable electrode. A gas burner or defocused laser beam is also usable as a heat source for heating the weld zone.