YAG laser-induced arc filler wire hybrid welding method and apparatus

摘要

PPROBLEM TO BE SOLVED: To realize a gap tolerance expansion for a thick plate butt welding and the prevention of the shortage of the height of reinforcement of weld, and to highly efficiently carry out a penetration welding in a thick plate lap welding or fillet welding. PSOLUTION: A YAG (yttrium aluminum garnet) laser induced arc filler wire complex welding process is performed inducing an arc on a filler wire by a plume, that is gas and metallic fumes generated in an plasma state by irradiating the base material to be welded with the YAG laser and limiting a plume produced with the YAG laser in and outside a keyhole, in the state aiming at a laser focal point 8 of YAG laser 9 to the base material to be welded 32 with a filler wire 20 and connecting a power source for wire heating 22 between the filler wire and the base material to be welded. A welding surface is covered with a hood 15, a straightening wire net 16 is put into an inside, the circumference of a welding focal point 8 is enveloped in the straightened flow of shield gas to protect from an oxidation, and the plume is retained. The filler wire 20 in a heating state is sent to a welding pool. PCOPYRIGHT: (C)2004,JPO