In the late 1940s, the United States began to study CNC machine tools, in 1952, the United States Massachusetts Institute of Technology (mit) servo laboratory successfully developed the first CNC milling machine, and put into use in 1957. The first cnc processing center in 1958 by the United States Carney - Trelake first developed successfully. It is based on the CNC horizontal boring and milling machine to increase the automatic tool changer, so as to achieve a workpiece after clamping a milling, drilling, boring, reaming and tapping and other processes of centralized processing. This is a major breakthrough in the development of manufacturing technology, marking the manufacturing sector in the beginning of the era of CNC lathe processing. CNC lathe processing is the basis of modern manufacturing technology, the invention for the manufacturing industry, with epoch-making significance and far-reaching impact. The world's major industrial developed countries attach great importance to CNC lathe processing CNC lathe processing technology research and development.

CNC machining is refers to the CNC machine tools for parts processing process. CNC machine tools is a computer to control the machine, used to control the computer computer, whether it is a dedicated computer, or general-purpose computers are collectively referred to as CNC system.

CNC machine tool movement and auxiliary action are controlled by the NC system issued by the instructions, and CNC system instructions by the programmer according to the workpiece material, processing requirements, machine characteristics and system requirements of the instruction format (CNC language or symbol) Compiled. CNC system according to the program instructions to the servo device and other functional parts issued a run end or information to control the various movements of the machine. When the machining process of the part is finished, the machine will automatically stop. Any kind of CNC machine tools, in its numerical control system if there is no input program instructions, CNC machine tools can not work. The control of the bed generally includes the start and stop of the machine; the start and stop of the spindle, the direction of rotation and the speed change; the direction, speed and mode of the feed movement; the selection of the tool, the compensation of the length and the radius; Liquid opening, closing and so on.

CNC machining process from the overall agreement is consistent, but also had a significant change. Machining method for controlling the displacement of parts and tools with digital information.

CNC machining is an effective way to solve the problems of variable variety, small batch, complex shape, high precision and high efficiency and automatic processing. The machining center was originally developed from CNC milling machines.