The division of CNC machining processes can generally be carried out in the following ways:

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

2. For parts with a lot of CNC machining content, the machining parts can be divided into several parts according to their structural characteristics, such as internal shape, external shape, curved surface or plane. Generally, the plane and positioning surface are processed first, and then the hole; simple geometric shapes are processed first, and then complex geometric shapes; parts with lower precision are processed first, and then parts with higher precision requirements.

3. For parts that are prone to CNC machining deformation, due to the deformation that may occur after rough machining, correction is required. Therefore, generally speaking, all rough and fine machining must separate the processes. In summary, when dividing the process, we must flexibly grasp it according to the structure and processability of the parts, the function of the machine tool, the amount of CNC processing content of the parts, the number of installations and the production organization status 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.