HOT WIRE TIG WELDING METHOD, PART TO BE WELDED BY THE METHOD, AND HOT WIRE TIG WELDING EQUIPMENT

摘要

PROBLEM TO BE SOLVED: To expand the weldable range without generating spatter in a hot wire TIG(tungsten inert gas) welding method. SOLUTION: As a TIG torch 30 having an electrode 32 along a joining edge of two members Wa and Wb to be welded to each other is moved, the voltage from a TIG power source 42 is applied to the electrode to form arc 33 between the electrode and the joining edge. A welding wire 38 supported in relation to the TIG torch is fed in a vicinity of the joining edge, and the joining edge is welded by energizing and heating by applying the voltage from a wire heating power source 41 to the welding wire. The wire heating power source controls the operation so that the voltage applied to the welding wire is constant. This hot wire TIG welding method is suitable to the welding of a housing W of a torque converter, and also suitable to the welding of various kinds of components to dislike spatter. COPYRIGHT: (C)2005,JPO&NCIPI