The division of processing processes are the following methods:

① centralized tool sequence method This method is divided by the use of cutting tools, using the same knife to complete all parts of the parts can be completed. Then use the second knife, the third knife to complete the parts they can be completed. This can reduce the number of tool change, compression stroke time, reduce unnecessary positioning error.

② rough, finishing The order of the individual parts to roughing, semi-finishing, and then finishing. For a group of parts, first all rough, semi-finishing, and finally finishing. Rough, finishing between, the best at intervals, so that after the deformation of rough parts to be fully restored, and then finishing, in order to improve the machining accuracy of the parts.

③ according to the processing of parts of the general order of the first processing plane, positioning surface, the hole after processing; first simple geometric shapes, and then processing complex geometric shapes; the first processing of low precision parts, and then processing parts of higher accuracy.

In short, the CNC machining parts, machining process is divided according to the specific circumstances of the specific analysis. Many processes are arranged according to the above sequence method.