(1) fine and fine boring: the aircraft Most of the precision light alloy (aluminum or magnesium alloy, etc.) parts using this method of processing. Generally with natural single crystal diamond tool, blade radius of less than 0.1 micron radius. Machining on high-precision lathes provides a 1 micron accuracy and an average height difference of less than 0.2 micron surface roughness with a coordinate accuracy of ± 2 microns.
(2) fine milling: for the processing of complex shapes of aluminum or beryllium alloy structure. Rely on the accuracy of the guide rail and spindle of the machine tool to obtain high mutual position accuracy. High-speed milling with a carefully grounded diamond bit provides a precise mirror.
(3) fine grinding: for processing shaft or hole parts. Most of these parts using hardened steel, with high hardness. Most high-precision grinding machine spindle with static pressure or dynamic pressure liquid bearings to ensure high stability. Grinding limit accuracy in addition to the machine tool spindle and bed stiffness of the impact, but also with the wheel selection and balance, the workpiece center hole processing accuracy and other factors. Fine grinding can achieve 1 micron dimensional accuracy and 0.5 micron roundness.
(4) grinding: the use of the principle of mutual cooperation with the processing of the surface of the irregular parts of the processing of selective processing. Abrasive diameter, cutting force and cutting heat can be precisely controlled, and therefore is the precision machining technology to obtain the highest precision machining methods. The hydraulic parts of the precision servo parts of the aircraft, the pneumatic parts of the dynamic gyro motor, are machined in this way to achieve a precision of 0.1 or even 0.01 micron and a microscopic rarity of 0.005 microns.