The operation and monitoring of the CNC machine tool are all completed in this CNC unit, which is the brain of the CNC machine tool. Compared with ordinary machine tools, CNC machine tools have the following characteristics: 　　1, strong adaptability to processing objects, adapt to the characteristics of single-piece production of molds and other products, and provide suitable processing methods for mold manufacturing; 　　2, high processing accuracy, with Stable machining quality; 　　3, multi-coordinate linkage can be carried out, can process parts with complex shapes; 　　4, when machining parts change, generally only need to change the CNC program, which can save production preparation time; 　　5, the machine tool itself has high precision and rigidity Large, can choose a favorable processing amount, high productivity (generally 3 to 5 times that of ordinary machine tools); 　　6, the machine tool has a high degree of automation, which can reduce labor intensity; 　　7, it is conducive to the modernization of production management. Numerical control machine tools use digital information and standard codes to process and transmit information, and computer control methods are used to lay the foundation for the integration of computer-aided design, manufacturing and management; 　　 8. The requirements for the quality of the operators are high, and the technical requirements for the maintenance personnel Higher; 　　9, high reliability.