The invention discloses a coaxial
powder feeding MIG wire
powder composite additive manufacturing device and method, and belongs to the field of
electric arc additive manufacturing. The device comprises an MIG wire
powder composite
welding gun for coaxial powder feeding; the composite
welding gun comprises a wire powder coaxial
copper nozzle with a wire feeding port in the middle, an
ion gas shell and a powder feeding shell.
Powder feeding ports are formed in the left end and the right end of the wire feeding port. The wire powder coaxial
copper nozzle is located at the bottom end of the
plasma arc welding gun and connected with the
welding gun shell. A second channel between the
ion gas shell and the powder feeding shell is used for feeding powder; the MIG
electrode comprises a welding wire tube used for arranging a welding wire, and one end of the welding wire is sent out through a wire feeding port. A slotting sleeve is arranged on the outer side of a welding wire tube of an MIG
electrode of the composite welding gun and located on the inner side of an
ion gas shell. According to the device, the welding wire and the powder can synchronously enter the
molten pool, so that the problem of component regulation and control in multi-component
alloy additive manufacturing is effectively solved, and the utilization efficiency of the powder is improved.