Parts with complex structures and shapes that are difficult to machine on ordinary machine tools, especially parts that require precision parts to be machined. The main surface of the parts is composed of complex curves and curved surfaces. During processing, multi-coordinate machining is required, which is difficult or even on ordinary machine tools. What can't be done, the machining center is the most effective equipment for processing such parts. Common typical precision parts have the following categories: (1) Cam parts. Such parts include disc cams, cylindrical cams, conical cams and end cams with various middle curves. During processing, three-axis, four-axis or five-axis linkage processing can be selected according to the complexity of the cam surface. (2) The overall impeller category. Integral impellers are usually used in aero engine compressors, air compressors, underwater propellers for ships, etc. In addition to the characteristics of general curved surface processing, there are also many processing difficulties when processing precision parts, such as narrow passages, and tools can easily interact with the interference between adjacent surfaces of the processed surface. What types of typical parts are commonly used in precision parts processing? (3) Mould category. Common molds include forging molds, forging molds, injection molds and rubber molds. For example, connecting rod forging die. The machining center is used to process molds. Due to the high concentration of working procedures, all key parts such as moving molds and static molds are basically completed in one installation, and the cumulative error of size and the workload of repairing are small. The colleague's mold has strong reproducibility and good interchangeability.