The invention discloses an efficient
laser additive manufacturing method based on wire
thermal conductivity welding, and belongs to the field of
laser material
machining. The method is characterized in that the action position of a
laser beam and a rear wire is located above a
molten pool; a wire material is melted in a heat conduction
welding mode to form molten drops, a base material below the molten drops is preheated by reflected light of the wire material, and meanwhile, metallurgical connection is performed between the molten drops and the base material; and
metal parts of various structures are manufactured through ascending and descending of a
workbench or a laser head according to a point-line-plane-body
route. Compared with a three-dimensional
heat transfer type
laser additive manufacturing method, the method adopts the laser melting wire located above the
molten pool, which belongs to one-dimensional
heat transfer, the heat
conduction loss of the material can be greatly reduced, the melting efficiency is improved, on the other hand, the preheating of the base material by the reflected light can promote spreading of the molten drops on the base material, and the
utilization rate of laser energy is further increased, in addition, the disturbance of violent evaporated steam of the material can be avoided by adopting the heat conduction
welding mode, the stability of theadditive manufacturing process is improved, and splashing particles and air holes are prevented from being formed.