Process of machining precision mechanical parts

Process of machining precision mechanical parts

       We know that precision machining requires high precision. Precision machining has good rigidity, high manufacturing precision, and accurate tool setting, so it can process parts with high precision requirements. It is impossible for precision parts processing to complete all the processing contents of all surfaces in one process. The entire processing process of precision parts processing is divided into the following stages.

      1. In the roughing stage, most of the machining allowances of each machining are removed, and the fine datum is machined, mainly to improve the machining efficiency as much as possible.

       2. Semi-finishing stage. To remove the defects that may occur after rough machining, to prepare for the finishing of the surface, it is required to achieve a certain machining accuracy, ensure an appropriate finishing allowance, and complete the secondary surface machining at the same time.

       3. Finishing stage. At this stage, a large amount of cutting speed, small feed and depth of cut are used to remove the finishing allowance left by the previous process, so that the surface of the part can meet the technical requirements of the pattern.

      4. Finishing stage. It is mainly used to reduce the surface roughness value or strengthen the machined surface. It is mainly used for surface machining with high surface roughness requirements (Ra≤0.32μm).

    5. Ultra-precision machining stage. The processing accuracy is 0.01-0.1μm, and the surface roughness value Ra≤0.001μm. The main processing methods are precision cutting, fine mirror grinding, precision grinding and polishing.