Precision machining process refers to various machining processes with machining accuracy and surface finish higher than that of corresponding machining methods. Precision machining process refers to various machining processes with machining accuracy and surface finish higher than that of corresponding machining methods. Precision machining process includes precision machining (such as diamond boring, precision turning, wide edge finish planing, etc.) and high-precision grinding. The machining accuracy of precision machining is generally 10 ~ 0.1 μ m. The tolerance grade is above it5 and the surface roughness Ra is 0.1 μ Below M.
Features: precision machining is a process of cutting a very thin layer of metal on the workpiece surface with very high or very low cutting speed, small cutting depth and feed by relying on high-precision and rigid machine tools and fine grinding tools. Obviously, this process can significantly improve the machining accuracy of parts. Because the residual area in the cutting process is small, and the adverse effects of cutting force, cutting heat and vibration are eliminated to the greatest extent, the surface deterioration layer left by the previous process can be effectively removed. After machining, the surface is basically free of residual tensile stress, the roughness is greatly reduced, and the quality of the machined surface is greatly improved.
high finish and high precision grinding includes precision grinding, ultra precision grinding and mirror grinding.
high finish and high precision grinding also requires high precision and rigidity of the machine tool. In the grinding process, a finely trimmed grinding wheel is used to produce multiple equal height micro cutting edges on each abrasive particle. With a very small grinding depth and under appropriate grinding pressure, very fine chips are cut from the workpiece surface, plus the sliding, extrusion Smoothing effect and friction polishing effect in multiple non feed polishing stages, so as to obtain high machining accuracy and high smooth surface with good physical and mechanical properties. In conclusion, the precision machining process can comprehensively improve the machining accuracy and surface quality of the workpiece.
