The application of CNC technology not only to the traditional manufacturing industry has brought revolutionary changes, so that the manufacturing industry has become a symbol of industrialization, and with the continuous development of CNC technology and the expansion of the field of application, it is on the national economy and people's livelihood of a number of important industries (IT, automotive, light industry, medical, etc.) the development of the role of an increasingly important role, because of the digitalization of the equipment required by these industries has been the modern development of the general Trend. The current trend of CNC lathe presents the following development trend.
1 high-speed, high-precision
High speed, precision is the eternal goal of machine tool development. With the rapid development of science and technology, electromechanical products to accelerate the speed of replacement, the precision of parts processing and surface quality requirements are increasingly high. In order to meet the needs of this complex and changing market, the current machine tool is to high-speed cutting, dry cutting and quasi-dry cutting direction, machining accuracy is also constantly improving. On the other hand, the successful application of electric spindles and linear motors, ceramic ball bearings, high-precision large-conductivity hollow internal cooling and ball nut cooling of low-temperature and high-speed ball screws and linear guides with ball retainers and other machine tool functional components of the market, but also for the machine tool to high-speed, precision development has created the conditions.
Numerical control lathe with electric spindle, the elimination of the belt, pulley and gears and other links, greatly reducing the rotational inertia of the main drive, improve the dynamic response speed of the spindle and working accuracy, completely solve the spindle high-speed operation of the belt and pulley transmission vibration and noise problems. The use of electric spindle structure can make the spindle speed of 10000r/min or more.
Linear motor drive speed is high, acceleration and deceleration characteristics are good, with superior response characteristics and following accuracy. Servo drive with linear motor, eliminating the ball screw as an intermediate transmission link, eliminating the transmission gap (including backlash), small motion inertia, good system rigidity, precision positioning at high speeds, thus greatly improving the servo accuracy.
Linear rolling guide vice, because it has zero clearance in all directions and very small rolling friction, wear and tear is small, negligible heat, there is a very good thermal stability, improve the whole positioning accuracy and repeatability of positioning accuracy.
Through the application of linear motor and linear rolling guide vice, it can make the machine tool's rapid traverse speed from the original 10 ~ 20m/min to 60 ~ 80m/min, and even as high as 120m/min.
2 High Reliability
Reliability of CNC machine tools is a key indicator of the quality of the products of CNC machine tools. CNC machine tools can play its high performance, high precision and high efficiency, and get good benefits, the key depends on its reliability.
3 CNC lathe design CAD, modular structural design
With the popularization of computer applications and the development of software technology, CAD technology has been widely developed.CAD can not only replace the manual completion of the tedious work of drawing, more importantly, can be designed to select and large parts of the machine static and dynamic characteristics of the analysis, calculations, prediction and optimization of the design can be made on the machine's working parts for dynamic simulation. Dynamic simulation of each working part of the whole machine. On the basis of modularity in the design stage can be seen in the three-dimensional geometric model of the product and realistic color. The use of CAD, but also can greatly improve the efficiency of work, improve the design of a successful rate, thus shortening the trial period, reduce design costs, improve market competitiveness.
Through the modular design of machine components, not only can reduce repetitive labor, but also can quickly respond to the market, shorten the product development and design cycle.
4 Functional composite
The purpose of functional composite is to further improve the productivity of the machine tool, used in non-processing auxiliary time is reduced to a minimum. Through the composite function, you can expand the scope of use of machine tools, improve efficiency, to achieve a multi-purpose, multi-machine, that is, a CNC lathe can be achieved both turning function, you can also achieve milling processing; or in the milling-based machine tools can also be achieved on the grinding process. Baoji Machine Tool Works has developed a successful CX25Y CNC milling and turning composite center, the machine tool at the same time with the X, Z axis, as well as the C-axis and Y-axis. Through the C-axis and Y-axis, can realize the plane milling and partial hole, slot processing. The machine is also equipped with a strong power tool holder and a sub-spindle. The sub-spindle adopts built-in electric spindle structure, through the CNC system can directly realize the main and sub-spindle speed synchronization. The machine tool workpiece can be clamped once to complete all the processing, greatly improving efficiency.
5 Intelligent, networked, flexible and integrated
The 21st century CNC equipment will be a system with a certain degree of intelligence. Intelligent content including all aspects of the CNC system: the pursuit of processing efficiency and processing quality of intelligence, such as adaptive control of the processing, process parameters automatically generated; to improve drive performance and use of the connection of intelligence, such as feed-forward control, adaptive operation of motor parameters, automatic identification of the load automatically selected model, self-tuning, etc.; simplify the programming, simplify the operation of intelligence, such as intelligent automatic programming, intelligent operation of the system. Such as intelligent automatic programming, intelligent human-machine interface, etc.; and intelligent diagnosis, intelligent monitoring and other aspects to facilitate the diagnosis and maintenance of the system.
Networked CNC equipment in recent years is a hot spot in the development of machine tools. Networking of CNC equipment will greatly meet the production line, manufacturing system, manufacturing enterprises on the demand for information integration, but also the realization of new manufacturing models, such as agile manufacturing, virtual enterprises, global manufacturing base unit.
CNC machine tools to flexible automation system development trend is: from the point (CNC stand-alone, machining centers and CNC composite processing machine tools), the line (FMC, FMS, FTL, FML) to the surface (work shop independent manufacturing island, FA), the body (CIMS, distributed network integrated manufacturing system) direction, on the other hand, to the focus on the direction of the development of the applicability and economy. Flexible automation technology is the manufacturing industry to adapt to the dynamic market demand and the rapid renewal of the main means of product, is the mainstream trend of the development of manufacturing industries in various countries, is the basic technology in the field of advanced manufacturing. Its focus is to improve the reliability of the system, the premise of practical, easy to network and integration into the goal, focus on strengthening the unit technology development and improvement. cnc stand-alone to high precision, high speed and high flexibility direction. CNC machine tools and its composition of flexible manufacturing system can be easily linked with CAD, CAM, CAPP and MTS, etc., to the direction of information integration. Network system to open, integrated and intelligent direction.