Which parts are suitable for CNC precision machining?

CNC precision machining mainly includes fine turning, fine boring, fine milling, fine grinding and grinding processes:

(1) Precision car and precision boring: Most precision light alloy (aluminum or magnesium alloys, etc.) parts in aircraft are mostly processed in this way, and natural single crystal diamond tools are generally used, with the arc radius of the blade arc less than 0.1 micron, and at a height Accuracy lathe machining can obtain 1 micron accuracy and surface unevenness with an average height difference of less than 0.2 microns, and coordinate accuracy can reach ±2 microns.

(2) Fine milling: used to process aluminum or beryllium alloy structural parts with complex shapes. Relying on the accuracy of the guide rail and spindle of the machine tool to obtain high mutual position accuracy. High-speed milling can be obtained by using carefully grinding diamond cutter heads for high-speed milling Accurate mirror.

(3) Fine grinding: used to process shaft or hole parts. Most of these parts are hardened steel and have high hardness. Most high-precision grinder spindles use static or dynamic liquid bearings to ensure high stability. In addition to being affected by the stiffness of the machine tool spindle and bed, the ultimate accuracy of grinding is also related to factors such as the selection and balance of the grinding wheel, the machining accuracy of the central hole of the workpiece. Fine grinding can obtain 1 micron dimensional accuracy and 0.5 micron non-circularity. Spend.

(4) Grinding: Use the principle of inter-graining of mating parts to select and process irregular protruding parts on the surface to be processed. The abrasive particle diameter, cutting force and cutting heat can be accurately controlled, so high-precision is obtained in precision machining technology Processing method. The hydraulic or pneumatic fittings in the precision servo components of the aircraft and the bearing parts of the dynamic gyro motor are processed in this way to achieve accuracy of 0.1 or even 0.01 microns and microscopic inequality of 0.005 microns.