What are the requirements for the divisionof CNC machining processes?
What are the requirements for the divisionof CNC machining processes?
WhenCNC machining processes are divided, it must be flexibly controlled based onthe structure and manufacturability of the parts, the functions of the CNCmachining center machine tools, the number of parts CNC machining content, the number ofinstallations and the production organization of the unit. It is alsorecommended to adopt the principle of process concentration or the principle ofprocess dispersion, which should be determined according to the actualsituation, but must strive to be reasonable. The division of processes cangenerally be carried out according to the following methods:
When CNC machining is divided into processes, it must be flexiblycontrolled according to the structure and manufacturability of the parts, thefunctions of the CNC machining center machine tools, the number of parts CNCmachining content, the number of installations and the production organizationof the unit. It is also recommended to adopt the principle of process concentrationor the principle of process dispersion, which should be determined according tothe actual situation, but must strive to be reasonable. The division ofprocesses can generally be carried out according to the following methods:
1. Tool centralized 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 thepart. In order to reduce the tool change time, compress the idle time, andreduce unnecessary positioning errors, the parts can be processed according tothe method of tool concentration, that is, in one clamping, use one tool toprocess all the parts that may be processed as much as possible, and thenChange another knife to process other parts. This can reduce the number of toolchanges during the plascticmachining, reduce idle time, and reduce unnecessary positioning errors.
2, the order of processing parts.
The structure and shape of each part are different, and thetechnical requirements of each surface are also different. Therefore, thepositioning methods are different during processing, so the process can bedivided according to the different positioning methods.
For parts with a lot of processing content, the processing part canbe divided into several parts according to its structural characteristics, suchas inner shape, shape, curved surface or plane, etc. Generally, the plane andpositioning surface are processed first, and then the hole is processed; thesimple geometric shape is processed first, and then the complex geometric shapeis processed; the parts with lower precision are processed first, and then theparts with higher precision requirements are processed.
3, the roughing and finishing are sorted in order.
When dividing the process according tofactors such as the machining accuracy, rigidity and deformation of the part,the process can be divided according to the principle of separating rough andfinishing, that is, roughing and then finishing. At this time, differentmachine tools or different tools can be used for processing; For parts that areprone to deformation during CNCmachining, due to the deformation that may occur after rough machining, itneeds to be corrected. Therefore, in general, all the rough and finishingprocesses must be separated.
