A CNC machine tool can be called a computer numerical control machine tool, which is an automated machine tool equipped with a program control system.

Mold is the basic process equipment in industrial production, a high-value-added, high-tech-intensive product, and an important field of high-tech industry. The level of its technical level has become an important indicator of a country's manufacturing level. With the continuous development of the national economy and industrial product technology, the demand for molds in all walks of life is increasing, and the technical requirements are getting higher and higher.

The cutting edge of the milling cutter is subjected to an impact load every time it cuts. In order to successfully mill, you must consider the correct contact mode between the cutting edge and the material when cutting in and cutting out. In the milling process, the workpiece is fed in the same or opposite direction as the rotation direction of the milling cutter, which will affect the cutting in and out of milling, and whether to use down milling or up milling.