COMPOSITE WELDING METHOD AND WELDING TORCH FOR COMPOSITE WELDING

摘要

Provided is a composite welding method that increases arc stability and is capable of improving welding speed and work efficiency. The invention is a composite welding method that welds parent metal generating a TIG arc at the leading side relative to the welding direction and generating a MIG arc at the trailing side. The invention selects a composite welding method characterized by: setting a TIG current larger than a MIG current and continuously generating an arc at a TIG electrode and a MIG electrode; and having a distance with an absolute value (L) of no more than 20 mm said distance being the distance between the intersection point (3B) of the TIG electrode center axis (3A) and the parent metal surface and the intersection point (4B) of the MIG electrode center axis (4A) and the parent metal surface.