What are the requirements for the division of CNC machining processes?

When distinguishing processes in CNC machining, it must be sensitive to the structure and craftsmanship of the parts, the function of the CNC machining center machine tool, the number of parts CNC machining content, the number of installations and the production organization of the unit. It is also advocated that the criteria for selection of process assembly is still the criteria for selection of process dispersion, which should be determined according to the actual situation, but must strive to be reasonable. The process can generally be distinguished according to the following methods:


1. Tool gathering and sorting method.

  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 the tool change time, shorten the idle time, and reduce unnecessary positioning errors, the parts can be processed according to the tool assembly process, that is, in one clamping, use one tool to process all the parts that may be processed as much as possible. Then change another knife to process other parts. In this way, the number of tool changes can be reduced, the idle time can be shortened, and unnecessary positioning errors can be reduced.


2. According to the order of processing parts.

  The structure and shape of each part are different, and the skill requirements of each surface are also different. Therefore, the positioning methods are different during processing, so the process can be distinguished according to the different positioning methods.

  For parts with many processing contents, the processing part can be divided into several parts according to its structural characteristics, such as inner shape, shape, curved surface or plane, etc. Generally, the plane and the positioning surface are processed first, and then the holes are processed; the simple geometry shapes are processed first, and then the complex geometry shapes; the parts with lower precision are processed first, and the parts with higher precision requirements are processed first.


3. Sorting method by roughing and finishing.

  When distinguishing processes according to the machining accuracy, rigidity and deformation of the parts, the processes can be distinguished according to the principle of separating rough and finishing, that is, roughing and then finishing. At this time, different machine tools or different tools can be used for processing; For parts that are prone to processing deformation, due to the deformation that may occur after roughing, it needs to be calibrated. Therefore, in general, all the rough and finishing processes must be separated.

Post time: Jan-07-2022