Since the beginning of the 21st century, with the continuous development of CNC technology and the expansion of application fields, it has played an increasingly important role in the development of some important industries (IT, automobile, light industry, medical care, etc.) for the national economy and people's livelihood, because the digitization of equipment required by these industries has been a major trend of modern development. In general, CNC lathes show the following three development trends:
High speed and high precision
High speed and precision are the eternal goals of machine tool development. With the rapid development of science and technology, the upgrading speed of mechanical and electrical products is accelerating, and the requirements for the accuracy and surface quality of parts processing are getting higher and higher. In order to meet the needs of this complex and changeable market, the current machine tools are developing in the direction of high-speed cutting, dry cutting and quasi-dry cutting, and the machining accuracy is also constantly improving. On the other hand, the successful application of electric spindle and linear motor, ceramic ball bearing, high-precision and large-lead hollow internal coolant and ball nut strong cooling of low-temperature and high-speed ball screw pairs and linear guide pairs with ball retainers and other functional components of machine tools have also created conditions for the development of machine tools to high speed and precision.
The CNC lathe adopts an electric spindle, which cancels the belt, pulley and gear, greatly reduces the moment of inertia of the main drive, improves the dynamic response speed and working accuracy of the spindle, and completely solves the vibration and noise problems of the belt and pulley transmission when the spindle runs at high speed. The electric spindle structure can make the spindle speed reach more than 10000r/min.
The linear motor has high driving speed, good acceleration and deceleration characteristics, superior response characteristics and follow-up accuracy. The linear motor is used as servo drive, which eliminates the intermediate transmission link of the ball screw, eliminates the transmission gap (including the reverse clearance), the motion inertia is small, the system rigidity is good, and it can be accurately positioned at high speed, thus greatly improving the servo accuracy.
The linear rolling guide pair, due to its zero anisotropic clearance and very small rolling friction, has small wear, negligible heating, and very good thermal stability, which improves the positioning accuracy and repeated positioning accuracy of the whole process. Through the application of linear motor and linear rolling guide pair, the fast moving speed of the machine tool can be increased from 10~20m/mim to 60~80m/min, and the maximum is up to 120m/min.
High reliability
The reliability of CNC machine tools is a key indicator of the quality of CNC machine tool products. Whether CNC machine tools can exert their high performance, high precision and high efficiency, and obtain good benefits, the key depends on their reliability.
CNC lathe design CAD, structural design modularization
With the popularization of computer applications and the development of software technology, CAD technology has been widely developed. CAD can not only replace the tedious drawing work done manually, but more importantly, it can select the design scheme and analyze, calculate, predict and optimize the static and dynamic characteristics of the whole machine, and can carry out dynamic simulation of the working parts of the whole machine. On a modular basis, the three-dimensional geometry and realistic colors of the product can be seen during the design phase. The use of CAD can also greatly improve work efficiency, improve the success rate of design, thereby shortening the trial production cycle, reducing design costs, and improving market competitiveness.