How to divide the cnc machining procedure?

The division of  CNC machining procedures can generally be carried out according to the following methods:

1. The tool centralized ordering method is to divide the processes according to the tools used, and use the same tool to process all the parts that can be completed on the part， then use the second knife and the third knife to complete other parts they can complete. This can reduce the number of tool changes and idle time, and also reduce unnecessary positioning errors.

2. According to the ordering method of processing parts, for parts with many CNC processing contents, the processing parts can be divided into several parts according to their structural characteristics, such as internal shape, outer shape, curved surface or plane. Generally, planes and positioning surfaces are processed first, and then holes; simple geometric shapes are processed first, and then complex; the parts with lower precision are processed first, and then the parts with higher precision requirements are processed.

3. For parts that are prone to CNC machining deformation by the rough and fine CNC machining, due to the deformation that may occur after the rough machining, the shape needs to be corrected, so in general, all the rough and finishing processes must be separate. In summary, when dividing the process, we must flexibly grasp the structure and manufacturability of the parts, the function of the machine tool, the number of parts CNC machining content, the number of installations and the production organization of the unit. It is also recommended to adopt the principle of process concentration or the principle of process dispersion, which should be determined according to the actual situation, but it must be reasonable.