Four processing stages of CNC prototype model making process

　　When the surface accuracy and roughness requirements of a part are relatively high, it is often impossible to complete the processing in one process, and it is divided into several stages for processing.

　　1.Four processing stages of the CNC prototype model making process

　　(1) Roughing stage. Roughing is mainly to remove most of the machining allowance on each surface, so that the shape and size of the blank are close to the finished product. This stage is characterized by the use of high-power machine tools and the selection of larger cutting tools to improve productivity and reduce tool wear as much as possible.

　　(2) Semi-finishing stage. Semi-finishing is to complete the processing of secondary surfaces and prepare for the finishing of major surfaces.

　　(3) Finishing stage. Finishing is the process of ensuring that the main surface meets the requirements of the pattern.

　　(4) Finishing stage. Finishing is a surface that requires high surface roughness and machining accuracy, and requires finishing. This stage generally cannot be used to improve the positional accuracy of parts.

　　It should be pointed out that the division of the processing stage is based on the entire process of parts processing, and cannot be judged by the processing of a surface or the nature of a certain process. At the same time, in specific applications, it cannot be absolute. For some heavy parts or parts with small margin and low precision, rough finishing of the surface can be completed after one clamping.