(1) Rough machining stage. Cut off most of the machining allowance of each machining surface, and process the precision benchmark. The primary consideration is to improve the productivity as much as possible.
(2) Semi finishing stage. Cut off the defects that may occur after rough machining, prepare for the finish machining of the surface, achieve certain machining accuracy, ensure appropriate finish machining allowance, and finish the machining of unnecessary surfaces together.
(3) Finishing stage. In this stage, large cutting speed, small feed rate and cutting depth are used to cut off the finishing allowance left by the previous process, so that the part surface can meet the technical requirements of the drawing.
(4) Finishing stage. It is mainly used to reduce the surface roughness value or strengthen the machined surface, and it is mainly used for high surface roughness requirements (ra ≤ 0.32 μ m) Surface finish.
(5) Ultra precision machining stage. The machining accuracy is 0.1-0.01 μ m. Surface roughness value ra ≤ 0.001 μ M processing stage. The primary processing methods are: precision cutting, precision mirror grinding, precision grinding and polishing.
