When dividing CNC machining processes, it is necessary to flexibly grasp the structure and processability of the parts, the functions of the CNC machining center, the amount of CNC machining content for 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 process dispersion, which should be determined based on the actual situation, but must strive for rationality. The division of processes can generally be carried out according to the following methods:

When dividing CNC machining processes, it is necessary to flexibly grasp the structure and processability of the parts, the functions of the CNC machining center, the amount of CNC machining content for 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 process dispersion, which should be determined based on the actual situation, but must strive for rationality. The division of processes can generally be carried out according to the following methods:

1. The centralized sorting method for cutting tools.

This method is to divide the process according to the tool used, and use the same tool to process all the parts that can be completed on the part. In order to reduce tool changing time, compress idle time, and reduce unnecessary positioning errors, parts can be processed using the method of tool concentration process, that is, in one clamping, use one tool as much as possible to machine the parts that can be processed, and then use another tool to process other parts. This can reduce the number of tool changes, compress the travel time, and reduce unnecessary positioning errors.

2. Sort by processing location.

The structural shape of each part is different, and the technical requirements of each surface are also different. Therefore, the positioning method during processing varies, and the process can be divided according to the different positioning methods.

For parts with a lot of processing content, the processing part can be divided into several parts according to its structural characteristics, such as inner shape, outer shape, curved surface or flat surface. Generally, the plane and positioning surface are machined first, and then the hole is machined; Process simple geometric shapes first, and then process complex geometric shapes; First process the parts with lower precision, and then process the parts with higher precision requirements.

3. Sort by rough and fine machining.

When dividing processes based on factors such as machining accuracy, stiffness, and deformation of parts, the principle of separating rough and fine machining can be used to divide processes, that is, rough machining first and then fine machining. At this time, different machine tools or cutting tools can be used for processing; For parts that are prone to machining deformation, due to the possible deformation that may occur after rough machining, they need to be calibrated. Therefore, generally speaking, for parts that require rough and fine machining, the processes must be separated.