Traditional machining is performed by manually operating ordinary machine tools. When processing, use mechanical tools to cut metal, use calipers and other tools to measure the accuracy of the product with the naked eye. Modern industry has adopted computer numerical control machine tools for operation. CNC machine tools can automatically process any products and parts directly according to the pre-written procedures of technicians. This is what we call "CNC machining". CNC machining is widely used in any field of mechanical processing, is the development trend of mold processing and important and necessary technical means. What is numerical control technology?
computer numerical 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. Machine tools that use numerical control technology to achieve processing control, or machine tools equipped with numerical control systems, are called numerical control (NC) machine tools. The numerical control system includes: numerical control device, programmable controller, spindle drive device and feeding device. CNC machine tools are highly integrated products of machine, electricity, liquid, gas and light. To realize the control of the machine tool, it is necessary to use geometric information to describe the relative movement between the tool and the workpiece, and to use process information to describe some process parameters that the machine tool must have. For example: feed speed, spindle speed, spindle forward and reverse rotation, tool change, coolant switch, etc. These information in a certain format to form a processing file (that is, the normal CNC machining program) and stored in the information carrier (such as disk, punched paper tape, tape, etc.), and then read by the CNC system on the machine (or directly through the CNC system keyboard input, or through the communication input), through its decoding, so that the machine moves and processing parts. Modern CNC machine tools are a typical product of mechatronics, and are the technical basis of a new generation of production technology and computer integrated manufacturing systems..
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 an open structure of hardware and software. CNC 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 the level of national comprehensive strength. Development. CNC machining center is a kind of CNC machine tool with tool magazine and automatic tool change, which can carry out various processing operations on the workpiece within a certain range. The characteristics of machining parts on the machining center are: after the machining parts are clamped once, the numerical control system can control the machine tool to automatically select and replace tools according to different procedures; Automatically change the machine tool spindle speed, feed speed and tool relative to the workpiece motion trajectory and other auxiliary functions, continuous and automatic drilling, countersinking, reaming, boring, tapping, milling and other multi-process processing. on the various machined faces of the workpiece. Because the machining center can automatically complete a variety of processes, it avoids human operation errors, reduces the time of workpiece clamping, measurement and machine tool adjustment, as well as the time of workpiece turnover, handling and storage, and greatly improves the processing efficiency and processing accuracy., Therefore, 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 enabling technology and the most basic equipment for the development of emerging high-tech industries and cutting-edge industries. 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 market adaptability and competitiveness. Industrial developed countries have also listed 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's "high-tech" key numerical control. Control technology and equipment. Therefore, vigorously developing digital advanced manufacturing technology with 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.