"CNC" is an abbreviation of Computerized Numerical Control.

What is Numerical Control technology, numerical control technology, numerical control for short. It is a method of controlling machine tool movement and machining process by using digital information. The machine tool that implements machining control with numerical control technology, or the machine tool equipped with numerical control system, is called numerical control (NC) machine tool. Numerical control system includes: numerical control device, programmable controller, spindle driver and feed device and other parts. CNC machine tool is a highly integrated product of machine, electricity, liquid, gas and light. In order to realize the control of the machine tool, it is necessary to describe the relative motion between the tool and the workpiece with geometric information and to describe some process parameters that the machine tool must have with process information. For example: feed speed, spindle speed, spindle positive and negative rotation, tool change, coolant switch, etc. These information forms a processing file (that is, the normal CNC processing program) in a certain format and is stored on the information carrier (such as disk, punched paper tape, tape, etc.), and then read by the CNC system on the machine tool (or directly through the keyboard input of the CNC system, or through communication), through the decoding, so that the machine tool action and processing parts. Modern CNC machine tool is a typical product of mechatronics, and is the technical basis of a new generation of production technology and computer integrated manufacturing system. The development trend of modern CNC machine tools is high speed, high precision, high reliability, multi-function, compound, intelligent and open structure. The main development trend is the development of intelligent full-function general CNC device with open structure of software and hardware. Numerical control technology is the basis of machining automation, is the core technology of numerical control machine tools, its level is related to the national strategic position and reflect the level of national comprehensive strength. It develops with the development of information technology, microelectronics technology, automation technology and detection technology. CNC machining center is a kind of CNC machine tool with a tool library and can automatically change the tool, and can carry out a variety of machining operations on the workpiece within a certain range. The characteristics of machining parts on the machining center are: after the machined parts are once installed, the CNC system can control the machine tool to automatically select and replace the tool according to different processes; Automatically change the spindle speed of the machine tool, feed rate and tool relative to the workpiece and other auxiliary functions, and continuously drill, countersink, ream, boring, tapping, milling and other processes of the workpiece machining surface automatically. Because the machining center can centrally and automatically complete a variety of processes, avoid artificial operating errors, reduce the workpiece clamping, measurement and adjustment time of the machine tool and the workpiece turnover, handling and storage time, greatly improve the processing efficiency and processing accuracy, so it has good economic benefits. The machining center can be divided into vertical machining center and horizontal machining center according to the position of the spindle in space. Horizontal machining center effectively solves large mold processing.