Common CNC Machining Problems and Solutions Part 1

How to divide machining processes in CNC machining?

① CNC Tool Centralization Sequencing Method

This method divides processes according to the tools used. All workable parts on the part are machined using the same tool, then the second and third tools are used to complete the remaining workable parts. This reduces tool changes, minimizes idle time, and reduces unnecessary positioning errors.

② CNC Machining Part Sequencing Method

For parts with many machining operations, the machining can be divided into several parts based on their structural characteristics, such as internal shapes, external shapes, curved surfaces, or planes. Generally, planes and locating surfaces are machined first, followed by holes; simple geometric shapes are machined first, followed by complex geometric shapes; and parts with lower precision requirements are machined first, followed by parts with higher precision requirements.

③ CNC Roughing and Finishing Sequencing Method

For parts prone to machining deformation, which may require correction after roughing, generally, all roughing and finishing operations should be separated. In conclusion, when dividing processes, it is essential to consider the structure and manufacturability of the parts, the capabilities of the machine tools, the amount of CNC machining involved, the number of installations, and the unit's production organization. Furthermore, whether to adopt a process concentration or dispersion principle should be determined based on the actual situation, but a reasonable approach should always be sought.