What is CNC machining?

Traditional machining is operated by hand with ordinary machine tools. During machining, metal is cut by hand with mechanical tools, and the accuracy of products is measured by eyes with calipers and other tools. Modern industry has long been using computer digital control of machine tools for operations, CNC machine tools can be in accordance with the technical personnel in advance of the program automatically for any product and parts of the direct processing. This is what we say "CNC machining". CNC machining is widely used in any field of all machining, and it is the development trend of mold processing and an important and necessary technical means. What is numerical control technology?
computer digital control, referred to as numerical control (Numerical Control). It is a method of using digital information to control the movement and processing of machine tools. With numerical control technology to implement the processing control of machine tools, or equipped with numerical control system of machine tools called numerical control (NC) machine tools. The numerical control system includes: numerical control device, programmable controller, spindle drive and feed device. CNC machine tools are highly integrated products of machine, electricity, liquid, gas and light. In order to realize the control of the machine tool, it is necessary to describe the relative movement between the tool and the workpiece with geometric information and to describe some process parameters that the machine tool must have. For example: feed speed, spindle speed, spindle forward and reverse, tool change, coolant switch, etc. The information according to a certain format to form a processing file (that is, the normal said CNC machining program) stored in the information carrier (such as disk, perforated 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 input), through its decoding, so that the machine tool action and processing parts. Modern CNC machine tool is a typical product of mechatronics, and it 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, composite, intelligent and open structure. The main development trend is to develop an intelligent full-function universal numerical control device with open structure in both software and hardware. Numerical control technology is the basis of machining automation, is the core technology of CNC 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 testing technology. CNC machining center is a kind of with a tool magazine and can automatically replace the tool, the workpiece can be a variety of processing operations in a certain range of CNC machine tools. The characteristics of machining parts on the machining center are: after the machined parts are clamped once, the numerical control system can control the machine tool to automatically select and replace tools according to different working procedures; Automatically change the machine tool spindle speed, feed rate, the movement track of the tool relative to the workpiece and other auxiliary functions, and continuously automatically carry out drilling, countersinking, reaming, boring, tapping, milling and other multi-process processing on each processing surface of the workpiece. Because the machining center can concentrate, automatically complete a variety of processes, to avoid the human operation error, reduce the workpiece clamping, measurement and machine tool adjustment time and 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.
CNC technology and equipment is the development of emerging high-tech industries and cutting-edge industry enabling technology and the most basic equipment. Numerical control technology is widely used in the information industry, biological industry, aviation, aerospace and other defense industries in the world to improve manufacturing capacity and level, and improve the ability to adapt to the market and competitiveness. Industrially developed countries also list numerical control technology and numerical control equipment as national strategic materials. They not only vigorously develop their own numerical control technology and its industry, but also implement blockade and restriction policies on China in terms of "high-precision" numerical control key technology and equipment. Therefore, vigorously developing advanced manufacturing technology with numerical control technology as the core has become an important way for developed countries to accelerate economic development and improve comprehensive national strength and national status.