In the process of precision parts processing, the design of cutting sequence and tool path is very important. In the cutting process, the equilibrium state of residual stress is broken, and a reasonable cutting sequence and path will make the residual internal stress change gradually and more evenly. When processing precision mechanical parts, the residual internal stress also reaches a balanced state and will not produce large deformation. Therefore, in precision processing, it is necessary to reasonably arrange the processing time of each surface of these parts, the number of processing times of each surface, and the order of processing, scientifically arrange the direction of the tool path and the direction of the tool feed and push of each cutting, and indicate these contents in the detailed processing process plan.
The cutting sequence and tool path of each surface of large-size parts can be used to remove the machining allowance in layers. In the process of turning the inner and outer surfaces and front and rear end faces of parts such as disks, drums, rings, or iron cutting surfaces, whether it is a rough machining process or a fine machining process, the machining allowance of each surface is not removed in one cutting, and needs to be cut twice or more.
The number of times each surface needs to be cut is divided according to the size of the process machining allowance. The machining allowances of each surface in the precision machinery parts machining process are similar, and the number of cutting times is basically the same. The machining allowances of each surface in the finishing process may vary greatly, and the number of cutting times of each surface will also be different. Before processing, the number of times each surface needs to be cut and the size of the allowance removed each time are determined according to the machining allowance of each sequence. During processing, it is removed layer by layer from the outside to the inside. Cutting the allowance of all machining surfaces in this way can gradually and evenly release the residual internal stress of the parts, and reduce the deformation of the parts during processing.
When machining precision parts, the design of the cutting sequence and tool path is very important in the process of removing the excess. During the cutting process of precision parts, the equilibrium state of residual stress is broken. Reasonable cutting sequence and tool path will make the residual internal stress change gradually and more evenly. When the precision mechanical parts are machined, the residual internal stress also reaches a balanced state, and the parts will not produce large deformation. Therefore, during precision mechanical machining, it is necessary to reasonably arrange the number of times each surface of these parts is machined, as well as the order of all surfaces. Scientifically arrange the tool path direction and tool feed and exit direction of each cutting, and mark these contents in the detailed machining process regulations.
