CNC numerical control machining, that is, computer digital control machining, is a way of high-precision machining by computer program control of machine tools. It uses computer programming, and by controlling the movement and cutting process of machine tools, parts with complex shapes and high-precision requirements can be machined. The characteristics of CNC numerical control machining include: 1, High machining accuracy: Due to the control of computer programs, CNC numerical control machining can achieve extremely high machining accuracy, and even achieve micron-level accuracy. 2, High machining efficiency: CNC numerical control machining can complete the processing of complex parts in a short time, improving production efficiency. 3. Good processing quality: Due to the precise control of cutting force, cutting speed and cutting depth, CNC numerical control machining can obtain high-quality machining surface. 4. Wide processing range: CNC numerical control machining can process various materials, including metal, plastic, wood, etc., and can process various complex shapes. 5. High degree of automation: CNC numerical control machining can reduce manual intervention and realize automated production. 6. Strong programmability: CNC numerical control machining can change the processing process by modifying the computer program, with strong programmability.