Complex surfaces in tool and mold manufacturing the product of the emergence of mass production Suburb rates. Forging die and dies used in the automotive industry appear before the CNC machine tools manufactured mainly by hand. To 70 years later, CNC machine tools in the tool and mold manufacturing has been widely basic outline of the application, usually complex surface milling, CNC machine tools, initially the surrounding three-axis linkage. In the 1980s, the five-axis milling machine to give the complex surface machining in a wide range of applications, the workpiece contour after milling has been very close to the final shape of the workpiece, but the final finishing process is still manual. The late 1980s, high-speed cutting technology gradually mature, it is used in industrial production from the machine, tool and other related technologies have been constantly improving. Since the high-speed cutting can exponentially increase the feed rate, so without reducing the productivity situation makes it possible to reduce the feed pitch, so as to improve the accuracy of the workpiece shape and roughness and lowering table provided preconditions. Currently, the majority of high-speed milling workpiece over last no longer required manual processing steps, which can be directly put into use.