Precision machining process for mechanical parts

Precision machining process for mechanical parts

We know that precision machining requires high precision. Precision machining has good rigidity, high manufacturing accuracy, and precise tool setting, so it can process parts with high precision requirements. Precision machining of parts cannot complete all surface machining tasks in one process. The entire machining process of precision parts can be divided into the following stages:

(1) Rough machining stage. Cut off most of the machining allowance on each machining surface and create a precision benchmark, mainly considering maximizing productivity.

(2) Semi precision machining stage. Remove any defects that may occur after rough machining, prepare for surface finishing, achieve a certain machining accuracy, ensure appropriate machining allowance, and complete the machining of secondary surfaces.

(3) Precision machining stage. At this stage, a large cutting speed, small feed rate, and cutting depth are used to remove the machining allowance left by the previous process, so that the surface of the part meets the technical requirements of the drawing.

(4) The finishing stage. Mainly used to reduce surface roughness values or strengthen processed surfaces, mainly used for high surface roughness requirements (ra ≤ 0.32) μ m) Surface processing.

(5) Ultra precision machining stage. Processing accuracy between 0.1-0.01 μ m. Surface roughness value ra ≤ 0.001 μ The processing stage of m. The main processing methods include precision cutting, mirror grinding, precision grinding, and polishing.