We know that precision machining requires high precision. Precision machining has good rigidity, high manufacturing accuracy and accurate tool setting, so it can process parts with high precision requirements. Then which parts are suitable for precision machining? Next, our sincere and precise chief engineer will introduce them to you.

First of all, CNC CNC lathe has the function of constant linear speed cutting compared with ordinary lathe. It can be machined at the same linear speed for both the end face of lathe and the outer circle of different diameters, that is to say, the surface roughness value is guaranteed and relatively small. The common lathe is a constant speed, the diameter of different cutting speed is different. In the case of material, finishing allowance and tool angle of workpiece and tool, surface roughness depends on cutting speed and feed speed.

When processing surface with different roughness, it is difficult to select small feed speed for surface with small roughness and larger feed speed for surface with large roughness, which is difficult to achieve in common lathe. Components with complex contours and shapes. Any plane curve can be approximated by straight line or arc. CNC precision machining has the function of arc interpolation and can process various parts with complex contours. The use of CNC precision processing requires careful use by operators.

CNC precision machining mainly includes finishing turning, boring, milling, grinding and grinding processes.

(1) Precision turning and fine boring: Most of the precise light alloy (aluminum or magnesium alloy, etc.) parts of aircraft are processed by this method. In general, natural single crystal diamond tools are used, and the arc radius of the cutting edge is less than 0.1 micron. The surface roughness of 1 micron and average height difference less than 0.2 micron can be obtained by machining on high precision lathe, and the coordinate accuracy can reach (+2 micron).

(2) Fine milling: used for processing complex aluminum or beryllium alloy structural parts. Relying on the accuracy of the machine tool's guide and spindle to obtain higher mutual position accuracy. High speed milling with carefully ground diamond cutter head can obtain accurate mirror surface.

(3) Precision grinding: used for processing shaft or hole parts. Most of these parts are hardened steel with high hardness. Most high precision grinder spindles adopt hydrostatic or hydrodynamic liquid bearings to ensure high stability. The grinding accuracy is affected not only by the stiffness of the spindle and the bed, but also by the selection and balance of the grinding wheel and the machining accuracy of the workpiece's central hole. The dimension accuracy of 1 micron and non-roundness of 0.5 micron can be obtained by fine grinding.

(4) Grinding: The irregular protruding parts on the machined surface are selected and processed according to the principle of mutual grinding of fittings. Abrasive diameter, cutting force and cutting heat can be accurately controlled, so it is a high precision processing method in precision machining technology. Hydraulic or pneumatic fittings in precise servo parts of aircraft and bearing parts of dynamic pressure gyro motor are processed by this method to achieve 0.1 or even 0.01 micron accuracy and 0.005 micron micro-roughness.