When the requirements of surface precision and roughness of parts are relatively high, it is often impossible to complete the processing in one process, and it is divided into several stages for processing.
- Four processing stages in the process of making CNC model
(1) Rough machining stage. Rough machining is mainly to cut off most of the machining allowance on each surface to make the shape and size of the blank close to the finished product. This stage is characterized by the use of high-power machine tools, the selection of larger cutting tools, as far as possible to improve productivity and reduce tool wear.
(2) Semi finishing stage. Semi finishing is to finish the machining of secondary surface and prepare for the finishing of primary surface.
(3) Finishing stage. Finish machining is to ensure that the main surface meet the requirements of the drawing.
(4) Finishing stage.
Finishing is a kind of surface with high requirements for surface roughness and machining accuracy, and it also needs finishing. This stage can not be used to improve the position accuracy of parts.
It should be pointed out that the division of processing stages is based on the whole process of parts processing, and cannot be judged by the processing of a certain surface or the nature of a certain process. At the same time, in the specific application, it can not be absolute. For some heavy parts or parts with small allowance and low precision, rough and finish machining can be completed after one clamping.
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