The invention provides a
metal cold-
welding additive manufacturing method. The method includes the steps that firstly, a part is subjected to 3D modeling on a main control computer, then the part is subjected to layered
processing, the size and shape characteristics of each layer are obtained, a movement
route is planed,
welding technological parameters are selected, then a corresponding
welding seam model of the part and a three-dimensional model of stacked
layers are established, and the welding seam size and the stacked-layer forming size are obtained; the stacked-layer forming size is compared with the size of each layer, and then the bead weld
route and the welding technological parameters are optimized and selected again; the main control computer inputs the bead weld
route and the welding technological parameters into a welding
machine, a wire feeder, a mechanical arm and
positioning equipment; then a high-energy pulse precise cold-welding technology is adopted to perform interrupted
spot welding, a spot weld is added to each
pulse period, cooling for heat dissipation is performed during each pulse interval, and it is guaranteed that a base body is at a normal temperature state; and the part is formed by stacking interrupted spot welds point by point, line by line and layer by layer, and the problems that the heat input quantity, heat deformation and a
grain structure are large, and it is difficult to plan the route in the manufacturing process are avoided.