We know that precision machining requires high precision, with good rigidity, high manufacturing accuracy, and precise tool setting, making it possible to process parts with high precision requirements. Precision parts processing cannot complete all surface processing tasks in one process, and the entire processing process of precision parts processing can be divided into the following stages:
(1) Rough machining stage. Cut off most of the machining allowance on each machining surface and produce precision benchmarks, mainly considering improving productivity as much as possible.
(2) Semi precision machining stage. Remove any defects that may occur after rough machining, prepare for surface finishing, and achieve a certain machining accuracy to ensure appropriate finishing allowance. At the same time, complete the processing of secondary surfaces.
(3) Precision processing stage. At this stage, a large cutting speed, small feed rate, and cutting depth are used to remove the finishing allowance left by the previous process, so that the surface of the part meets the technical requirements of the drawing.
(4) Finishing stage. Mainly used to reduce surface roughness values or strengthen machined 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, precision mirror grinding, precision grinding, and polishing.