How many ways for CNC machining processing methods?

In industry, precision cnc machining is a relatively common machining method. Several CNC machining methods about precision CNC machining :
   ① Good CNC turning and fine boring: Most precision light alloy (aluminum or magnesium alloy) parts of aircraft are processed by this method. Natural single crystal diamond tools are generally used, and the arc radius of the blade edge is less than 0.1 micron. Machining on a high-precision lathe can achieve 1 micron accuracy and surface unevenness with an average height difference of less than 0.2 micron, and coordinate accuracy can reach ± 2 micron.
   ②Good CNC milling: used for CNC machining aluminum or beryllium alloy structural parts with complex shapes. Relying on the accuracy of the guide and spindle of the machine tool to obtain higher mutual position accuracy. High-speed milling with carefully ground diamond tips for precise mirror surfaces.
   ③ Good grinding: used for machining shaft or hole parts. Most of these parts are made of hardened steel and have high hardness. Most high-precision grinding machine spindles use hydrostatic or dynamic pressure liquid bearings to ensure high stability. In addition to the influence of the rigidity of the machine tool spindle and the bed, the ultimate accuracy of grinding is also related to the selection and balance of the grinding wheel and the machining accuracy of the center hole of the workpiece. Fine grinding can achieve dimensional accuracy of 1 micron and out-of-roundness of 0.5 micron.
   ④ Grinding: Selecting and processing irregular raised parts on the surface to be processed using the principle of mutual research of matching parts. Abrasive particle diameter, cutting force and cutting heat can be precisely controlled, So it is the most accurate machining method in precision CNC machining technology. The hydraulic or pneumatic mating parts of the precision servo parts of the aircraft and the bearing parts of the dynamic pressure gyro motor are all processed by this method to achieve an accuracy of 0.1 or 0.01 micron and a micro unevenness of 0.005 micron.
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