Combined additive manufacturing method applicable to parts and molds

A combined additive manufacturing method applicable to parts and molds, comprising the steps of:

• S 1:
• layering and slicing a three-dimensional CAD (computer-aided design) model of a workpiece to be formed according to shape, thickness and dimensional accuracy requirements of the workpiece, so as to obtain a plurality of layered slice data, wherein each of the layered slice data comprises a thickness, a shape and a dimensional accuracy of a layered slice;
• S2:
• planning a forming path according to the layered slice data, and generating layered slice numerical control codes for forming;
• and
• S3:
• deposition-forming a powder material on a substrate layer-by-layer according to the layered slice numerical control codes in the step S2, which uses a numerically controlled high-speed cold spray gun to spray the powder material to a determined position for deposition-forming;
• wherein the numerically controlled high-speed cold spray gun moves above a coating surface of the substrate during operation, and a pressure forming device and a milling forming device are mounted behind the numerically controlled high-speed cold spray gun;
• wherein the pressure forming device and the milling forming device are multiple layers away from an area to be processed;
• wherein during high-speed cold spray forming, the pressure forming device and the milling forming device are movable with the numerically controlled high-speed cold spray gun for pressure-forming and milling-forming after deposition-forming, so as to improve forming property and forming precision of deposition-forming;
• wherein sprayed particles are selected from the group consisting of metals, intermetallic compounds, ceramics, cermets, ceramic composites, and gradient functional materials.