The rise of the equipment manufacturing industry is an important support for China's industrial modernization and the improvement of the country's overall national strength. On the one hand, manufacturing progress enhances material production capacity and solves the problem of manufacturing key equipment. On the other hand, the common technology of military and civilian use in manufacturing is of great significance to national defense and national security. CNC technology is a key technology group supporting modern equipment manufacturing industry. It directly determines the function and performance of manufacturing equipment. It is the key technology for informationization to drive the equipment layer in the industrialization process, and belongs to the important basic technology group supporting advanced manufacturing technology. Moreover, the numerical control technology is characterized by high-precision follow-up control and multi-motion coordinated control. It has common technical foundations with automatic artillery control, radar control and gyro navigation control technology, and has typical application characteristics of military and civilian. I. The international competition environment is the containment of the rise of China's numerical control technology. It is precisely because of the characteristics of dual-use CNC technology. The international competition environment has obvious intentions to curb the rise of China's numerical control technology. From the "Batumi" to the technical blockade stage of the Cox report, to the establishment of factories through joint ventures, local production, low-end product dumping, and the independent research and development of China's domestic research and development forces can reflect the intention to contain. Quite a number of facts prove that we are trying to introduce the technology, the good intention of "changing technology with the market" is just wishful thinking. The result is often that the market is lost, but the technology has not been exchanged. At present, the controller giants headed by Japan FANUC and SIEMENS monopolize more than 80% of the products, and high-end products not only monopolize but also restrict Chinese imports. Through nearly 20 years of continuous technological research and market cultivation, China has created a number of CNC manufacturers, opening up the situation in the low-end market and forming a certain market scale; but in the technology-intensive mid-to-high-end controller market, the scale of domestic controllers Always in a compressed state, profit margins are compressed, and R&D systems cannot support sustainable technological advances. Industry experts admit that "the level of China's CNC machine tools and the world's developed countries are at least 15 years." Japanese international economics parent Tanikawa Taro, published an article entitled "China's future depends on Japan" in the May 2005 issue of Japan's "Huasheng". According to the article, in the automobile manufacturing industry, the average working time of machine tools for producing auto parts is as high as 3,500 hours, and only Japanese-made machine tools can guarantee the performance for five consecutive years. "Without Japan's machine tools, China's auto industry will be difficult to move." Hasegawa Kyotaro predicts that China’s dependence on Japan will only grow stronger and will not weaken. This means that "Japan is increasingly capable of controlling China." Objectively analyzing this article and abandoning the arrogant mentality of a few Japanese scholars, the article's point of view is that it should arouse our sense of urgency in terms of the gap between the key components of the manufacturing equipment and the products in the equipment manufacturing industry. Second, the key to breakthrough technology containment is to establish an independent innovation platform suitable for the growth of core technology systems The key to anti-containment is to build an independent innovation platform suitable for the growth of core technology systems, from passive technology catch-up to active technology confrontation. High-end CNC technology is not only a problem of controllers, but a group of technical disciplines related to motor, drive, measurement, communication, computer hardware and software technology, and machine tool testing and simulation. These technical aspects will have an impact on the final device control effect. This problem is illustrated by taking high-speed, high-precision, high-response motion control as an example. From the material published by FANUC, the control resolution is increased to nanometer to double the precision of the processed product and double the surface quality. But this result requires a comprehensive technical upgrade of the controller. For the implementation of high-speed motion control technology, motion trajectory analysis and prediction based on the advance read mechanism is required. This mechanism will place higher demands on the architecture of the system. Trajectory smoothing and jerk control are all necessary techniques to avoid shocks in high-speed motion control. The calculation accuracy of the interpolator should be increased from 1 um to 1 nm, the calculation word length should be increased by three digits, and the effective calculation accuracy should be increased by three orders of magnitude. The software platform must support the calculation of the corresponding word length. On the other hand, the control of the beat also needs to be improved accordingly, otherwise the accuracy of the simple command is not meaningful. This of course has a higher demand for the computing load of the system, and the system hardware platform must have a higher speed. It is not enough to implement this resolution only in the controller, and this control amount is also sent to the servo drive. Due to the expansion of the effective word length, the control beat is improved, and the demand for the corresponding communication generation width is also increased. The servo communication problem must be digital, and the pulse mode and analog plus position pulse feedback cannot meet the requirements. On the servo side, it is clear that a higher precision control problem is to be pursued. The first is the need for a more accurate position feedback original. At present, the international high-precision servo device sensor has been upgraded to 2 million lines to 4 million lines, so that it can cooperate with existing mechanical devices to achieve nano-level control. Our domestic control can guarantee that the high-speed digital communication protocol of the controller synchronous sampling is a problem that must be solved. The problem of high precision control of the servo itself is also a problem that must be solved. FANUC emphasizes HRV (High Response Vector Control), and Mitsubishi emphasizes that OMR (Optimized Mechanical Response Control) directly points to the core problem of high-precision servo control – high-precision, fast-responding current loop design. Only good current loop characteristics can lay the foundation for good speed control and position control. Many control techniques can make a difference in the process of solving this core contradiction, including various state recognition, synovial control and variable parameter control. To achieve high-precision control, it is not enough to rely solely on the controller and servo drive. Motor design itself is an important factor that directly affects the effects of motion control. For a permanent magnet synchronous servo motor, a good back EMF positive rotation, a small cogging force will be very beneficial to the servo drive to achieve low speed smooth control. Many manufacturers of high-precision drive devices are themselves motor manufacturers. In many domestic research institutions, motor technology and servo drive technology are separated by departments, and some even do not have motor technology support for servo drives. In the study of high-precision motion control, simulation technology will greatly shorten the time and implementation cost of our research in control algorithms. While supporting the simulation technology, it is also necessary to develop a test platform to evaluate the effects of motion control and evaluate the performance of servo drives and motors. For example, how to evaluate low speed stationarity and stiffness. Third, the numerical control technology has breakthrough technical conditions and industrial conditions to break through. The main means to reduce the containment of our CNC technology is to reduce the dependence on foreign technology, select the key technology with technical support conditions as a breakthrough, take the initiative to break through, in order to compete for competition. Active. With the support of computer hardware and software technology and communication technology advancement in the past decade, CNC technology has the key technology breakthrough conditions. From the perspective of industry, the basic characteristics of CNC controller products can be summarized as dedicated industrial computers; the characteristics of servo drive system products are industrial power supplies for driving motors; the characteristics of servo motor products are high with high-precision position feedback originals. Precision motor. In view of these product characteristics, from the industrial point of view, China is fully equipped with high-end CNC system industry conditions, and some products with similar industrial characteristics are world-leading. Therefore, jumping out of the narrow sense of motion controller manufacturing, from the perspective of China's industry as a whole, the CNC system industry breakthrough is industrial support conditions. Another feature of the CNC system industry is the softwareization of technology. Software running on digital controllers and servo drives carries the main functions and performance of the system. Therefore, competition in this industry will be more transformed into an intellectual level competition based on software technology, control technology and manufacturing technology, and an engineering level competition characterized by technology integration. The high-speed high-precision motion control technology is taken as an example to illustrate that the high-end controller technology is a closely coupled technical discipline group. As a high-tech numerical control technology innovation system should have the integrity of the technology chain, so we call this technology innovation system a "technical innovation platform." The investment in the construction of such a technological innovation platform is enormous. Take Japan FANUC as an example, staying ahead in technology and ranking first in the world in terms of output. The company has 3,674 employees, more than 600 researchers, and 7,000 monthly production capacity. Sales account for 50% of the world market. R&D investment is 10% of sales, and annual research and development costs are hundreds of millions of dollars. Obviously, supporting the above platforms is very difficult to rely on a company or unit under the existing research conditions in China. We can only integrate technological resources through the integration of technical resources, including the institutions of higher learning and other research institutions, with the industrial chain and technology linkages, to form a new type of industry-university-research innovation organization, which is realized under the relevant national policy support and guidance. It is possible to achieve technological leapfrogging with an innovative technology platform that is closely coupled with multiple technologies.
Alloy Barrel Screw,Bimetallic Screw And Barrel,Bimetallic Alloy Barrel Screw,Bimetallic Twin Screw And Barrel
Zhoushan Jinmao Machinery Manufacturing Factory , https://www.jinmao-machinery.com