Before programming, process analysis must be performed on the cnc machining parts, draw up processing plans, select appropriate tools, and determine the amount of cutting. In programming, some technological issues, such as tool setting points and machining routes, also need to be dealt with. Therefore, the process analysis in programming is very important. When processing parts on ordinary machine tools, the process procedures or process cards are used to specify the operating procedures of each process. The operator processes the parts according to the steps specified on the process card. When machining parts on a CNC machine tool, all the process processes, process parameters and displacement data to be processed must be compiled into a program and used to control the machining of the machine tool. The machining process of CNC machine tools is basically the same as that of ordinary machine tools. The whole process is automatic and therefore has its own characteristics:
1. The content of the process is complicated
This is because CNC machine tools are more expensive than ordinary machine tools. It is not economically economical to process only simple procedures. Therefore, more complicated procedures are usually arranged on CNC machine tools, and even difficult to complete on ordinary machine tools.
 
2. The arrangement of working steps is more detailed. This is because the problems that need not be considered in the processing technology of ordinary machine tools, such as the arrangement of steps in the process, the setting of the tool setting point, the tool change point and the determination of the processing route, can not be ignored when programming the CNC machine tool processing technology.
 
3, rely on the program to complete all processes.

 
4, CNC machine tool processing program is a command file of CNC machine tools.
 
5. CNC machine tools are controlled by program instructions, and the entire process of processing is performed automatically according to program instructions.
 
6. The CNC machine tool processing program not only includes the process of the part, but also includes the process parameters necessary to complete the process, such as cutting amount, feed route, tool size number and machine tool movement process.
 
7. CNC machining has high efficiency, high machining accuracy, low labor intensity, and strong adaptability to different workpieces.