The invention discloses a
titanium alloy laser-MIG composite
welding method. A
titanium alloy connector to be welded is machined into an I-type groove, and the connector is of a
butt joint type. A weld joint protection pulling cover is fixed to an MIG gun
nozzle, and a pulling cover body is arranged on the upper surface of a weld joint. Vertical incidence of a
laser beam is performed from the position 0-3 mm in front of the MIG, and a
welding wire is sent to the upper surface of the groove through the MIG gun
nozzle. After a compound heat source melts the
welding wire, a connector gap is the filled, and welding forming of a workpiece single track is achieved. The
titanium alloy laser-MIG composite welding method overcomes the defects that the
titanium alloy weld joint welding is prone to
pollution, the requirement for laser welding assembling conditions is high, the efficiency of MIG welding is low, a weld
joint heat affection zone is large, and the number of air holes, cracks and the like is increased. Under the premise that the welding efficiency is not reduced, the requirement for the assembling conditions is lowered, and the
titanium alloy laser-MIG composite welding method has the advantages that the welding penetration is large, the welding speed is high, the deformation of a workpiece is small, the
assembly requirement is low, the bridging capacity of a melting
pool is high, the welding quality is high, the performance of the weld joint is good, and automatic welding can be easily achieved.