CNC also known as computer gongs, CNCCH or nc machine tool is actually Hong Kong there's a term, then was introduced into China, the pearl river delta is CNC milling machine, and in jiangsu area to be called "CNC machining center" a kind of mechanical processing, is a new processing technology, main job is processing program, the original manual work to computer programming. Of course, experience in manual processing is required. Is CNC CNC machining bed, and in jiangsu area to be called "CNC machining center," is a kind of a program control system of automatic machine tools. Numerical control machine is the abbreviation of Computer numerical control it is a kind of automatic machine controlled by program. The control system can logically process a program with control coding or other symbolic instructions, decoding it through a computer, thus enabling the machine to move and process parts. The rough materials are processed into semi-finished parts by cutting tools.