The cutting tool should be made of materials with high hardness, high bending strength and toughness, good wear resistance, good thermal hardness, good manufacturability and good heat dissipation, mainly high-speed steel W6Mo5Cr4V2Al, W2Mo9Cr4VCo5(M42) and cemented carbide YG8, K3O and Y330. The geometric parameters of cutting tools should be based on the principle of ensuring high strength, good rigidity and sharpness of cutting tools, and the slenderness ratio should not be too large, which can be divided into rough machining and fine machining. It is best to use forward milling when machining. See table 1 for milling cutter parameters and table 2 for conventional milling parameters. When milling, enough water-soluble oily cutting fluid must be injected to reduce the temperature of the cutter and workpiece, and the cutting fluid flow rate should be not less than 5L/min to prolong the service life of the cutter.
On the basis of the above-mentioned conventional machining, in order to further improve the milling efficiency, we carried out efficient milling experiments on the machine tool of the powerful milling center, and obtained ideal cutting parameters, tools and cutting fluids. See Table 3 for milling parameter data. Through the comparison between high-efficiency milling and conventional milling, it can be seen that the efficiency of high-efficiency milling is 2 ~ 4 times higher than that of conventional milling, the surface quality of parts is also greatly improved, the machining cycle is greatly shortened, and the manufacturing cost is correspondingly reduced.