lathe workers, rotary parts, have the advantages of fast speed, wide range and medium precision. The disadvantages are drilling non straight milling workers and machining molds. The advantages are that machining complex workpieces belongs to rough machining and low surface milling operation roughness. The reason is that discontinuous cutting grinders, high-speed cutting and micro cutting belong to finish machining, low efficiency and easy to damage workpieces. Processing dangerous heat treatment is used to improve the mechanical properties of workpieces
