The formulation of machining process specification can be divided into two steps. First draw up the process route of parts processing, and then determine the process size, equipment and process equipment used, cutting specification, man hour quota, etc. of each process. These two steps are interrelated and should be comprehensively analyzed.

The formulation of process route is to formulate the overall layout of the process. The main task is to select the processing method of each surface, determine the processing sequence of each surface, and the number of processes in the whole process. When machining surfaces with different surface roughness, select small feed speed for surfaces with small roughness and larger feed speed for surfaces with large roughness. The variability is very good, which is difficult to do on ordinary lathe;

For the parts with complex contour shape, any plane curve can be approached by straight line or arc. CNC precision machining has the function of arc interpolation, which can process all kinds of parts with complex contour. The use of CNC precision machining needs the careful use of the operator. Precision mechanical parts processing needs to produce high-quality and stable products. In order to achieve this goal, the staff must have rich machining experience and excellent technology. As we all know, machining is a fine work, and excellent technology must be done well.

Dalian auto parts processing in precision machining, when the workpiece is cutting, the surface of the workpiece will form almost the same impression as the tool shape and leave a large number of scales and thorns, which is easy to increase the roughness of the workpiece surface and reduce the quality of the workpiece surface;

Generally speaking, in this case, during cutting, the radius of the tip arc of the tool should be appropriately increased, the feed amount of the tool should be appropriately reduced, and the height of the residual area of the tool on the workpiece should be reduced as much as possible, so as to ensure that the roughness of the workpiece surface is controlled within an appropriate range, which can effectively reduce the scale and thorn on the workpiece surface, so as to improve the quality of the workpiece surface, Prolong the service life of the workpiece.