CNC lathes are one of the most widely used CNC machine tools. It is mainly used for cutting inner and outer cylindrical surfaces of shaft parts or disc parts, inner and outer conical surfaces with arbitrary cone angles, complex rotating inner and outer curved surfaces, cylinders, and conical threads. It can also perform grooving, drilling, reaming, and reaming. Hole and boring etc. The CNC machine tool automatically processes the processed parts according to the pre-programmed processing program. We compile the machining process route, process parameters, tool motion trajectory, displacement, cutting parameters and auxiliary functions of the parts into a machining program list according to the instruction code and program format specified by the CNC machine tool, and then record the contents of the program list On the control medium, it is then input into the numerical control device of the numerical control machine tool to direct the machine tool to process the parts.