Current CNC lathes show the following development trends
The change of life has made the manufacturing industry a symbol of industrialization, and with the continuous development of cnc machining technology and the expansion of the application field, it has played an increasingly important role in the development of some important industries (IT, automotive, light industry, medical, etc.) of the national economy and people’s livelihood. It is becoming more and more important, because the digitization of equipment required in these industries is a general trend of modern development.
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 of mechanical and electrical products has accelerated, and the requirements for the accuracy and surface quality of parts processing have become 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 continuously improved. On the other hand, the successful application of electro-spindles and linear motors, ceramic ball bearings, high-precision large-lead hollow internal cooling, and ball nut forced cold low-temperature high-speed ball screw pairs and linear guide pairs with ball cages and other machine tool functional components The launch of the market also created conditions for the high-speed and precision development of machine tools. The CNC lathe uses an electric spindle, eliminating the links of belts, pulleys and gears, greatly reducing the moment of inertia of the main drive, improving the dynamic response speed and working accuracy of the main shaft, and completely solving the problems of belts and pulleys when the main shaft is running at high speed. Vibration and noise issues. 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, and excellent response characteristics and following accuracy. The linear motor is used for servo drive, eliminating the intermediate transmission link of the ball screw, eliminating transmission gap (including backlash), small motion inertia, good system rigidity, and precise positioning at high speed, which greatly improves Servo accuracy. The linear rolling guide pair has zero friction in all directions and very small rolling friction, low wear, negligible heat generation, and very good thermal stability, which improves the positioning accuracy and repeatability during the whole process. Through the application of linear motors and linear rolling guide pairs, the rapid movement speed of the machine can be increased from the current 10-20m / mim to 60-80m / min, or even up to 120m / min.
The reliability of CNC machine tools is a key indicator of the quality of CNC machine tools. Whether CNC machine tools can exert their high performance, high precision and high efficiency, and obtain good benefits, depends on their reliability.
CAD design of CNC lathe and modular structure design
With the popularization of computer applications and the development of software technology, CAD technology has been widely developed. CAD can not only replace manual and tedious drawing work, but more importantly, it can select design schemes and analyze the static and dynamic characteristics, calculation, prediction and optimization of the large machine. It can also dynamically simulate the working parts of the machine. . On the basis of modularity, the three-dimensional geometric model and realistic colors of the product can be seen at the design stage. The use of CAD can also greatly improve work efficiency and increase the first-time success rate of the design, thereby shortening the trial production cycle, reducing design costs, and improving market competitiveness. Through modular design of machine tool components, not only can reduce repetitive labor, but also can quickly respond to the market and shorten product development and design cycles.
The purpose of functional compounding is to further improve the production efficiency of machine tools and minimize the non-machining auxiliary time. Through the compounding of functions, the range of use of the machine tool can be expanded and the efficiency can be increased to achieve one machine with multiple functions and one machine with multiple functions, that is, one CNC lathe can implement both turning functions and milling processing; or Grinding is also possible on the china cnc machine. Baoji Machine Tool Plant has successfully developed the CX25Y CNC Turning and Milling Compound Center, which has both X and Z axes as well as C and Y axes. Through the C and Y axes, plane milling and offset hole and slot machining can be realized. The machine is also equipped with a powerful power tool post and a counter-spindle. The sub-spindle adopts a built-in electric spindle structure, and the speed of the main and sub-spindles can be synchronized directly through the numerical control system. The machine tool can complete all the processing in one clamping, which greatly improves the efficiency.
Intelligent, networked, flexible and integrated
The 21st century CNC equipment will be a certain intelligent system.
The intelligent content includes all aspects in the numerical control system: in order to pursue the intelligentization of processing efficiency and processing quality, such as adaptive control of the processing process, automatic generation of process parameters; in order to improve the driving performance and intelligent use of connection, Such as feedforward control, adaptive calculation of motor parameters, automatic identification of load, automatic selection of models, auto-tuning, etc .; simplified programming and intelligent operation, such as intelligent automatic programming, intelligent human-machine interface, etc .; It has intelligent diagnosis, intelligent monitoring and other aspects to facilitate system diagnosis and maintenance. Networked CNC equipment is a hot spot in machine tool development in recent years. The network of CNC equipment will greatly meet the information integration requirements of production lines, manufacturing systems, and manufacturing enterprises, and it is also the basic unit for implementing new manufacturing models, such as agile manufacturing, virtual enterprises, and global manufacturing. The development trend of CNC machine tools to flexible automation systems is: from points (NC single machine, machining center and CNC composite machining machine tools), lines (FMC, FMS, FTL, FML) to faces (independent workshop islands, FA), CIMS, distributed network integrated manufacturing system), and on the other hand, it focuses on application and economy. Flexible automation technology is the main method for the manufacturing industry to adapt to dynamic market demands and rapid product updates. It is a mainstream trend in the development of manufacturing industries in various countries and is the basic technology in the advanced manufacturing field. Its focus is to improve the reliability and practicality of the system, with the goal of easy networking and integration, and focus on strengthening the development and improvement of unit technology. CNC single machine is developing towards high precision, high speed and high flexibility. NC machine tools and their flexible manufacturing systems can be easily connected with CAD, CAM, CAPP, and MTS, etc., and develop towards information integration. The network system is developing towards openness, integration and intelligence.