Development focus: high-end CNC machine tools thanks to China's economic growth, the domestic machine tool industry has made rapid progress in recent years. According to relevant data, since 2009, China's machine tool production value has ranked first in the world for two consecutive years, with a market share of more than 30. In 2011, despite the negative impact of the domestic and international economic downturn, the year-on-year growth rate of China's machine tool industry showed a downward trend, but the data show that in 2011 China's machine tool industry completed a total industrial output value of 743.761 billion yuan, an increase of 32.50 year-on-year (Figure 1)), still showing a faster development speed as a whole. Another concern is that in 2011, the operation scale of Shenyang Machine Tool Group also leapt to the forefront of the global industry and became another pride of Chinese companies. At the same time, China is also the world's largest consumer and importer of machine tools. In terms of market demand, with the strong development momentum of a number of high-growth industries based on heavy industry such as domestic automobile, steel, machinery, mold, electronics and chemical industry, the demand for efficient and high-precision automated manufacturing equipment, machine tool industry Enter the stage of rapid growth. In terms of imports, in the first half of 2011, the total amount of machine tools imported from Japan and Germany has exceeded 60. From the perspective of imported models, the demand for precision production, high-efficiency and high-speed CNC machine tools has increased significantly. The structure of China's machine tool demand has undergone major changes. CNC machine tools are mechatronics machine tools with digital manufacturing technology as the core. They are usually composed of control system, servo system, detection system, mechanical transmission system and other auxiliary systems. They can be roughly divided into CNC lathes, CNC milling machines, machining centers, etc. 16 Large variety. In the newly enacted National Twelfth Five-Year Plan, it is clearly proposed to focus on the development of information technology, automation, and intelligence level of high-end equipment manufacturing industry, which is obviously inseparable from the strong support of the precision machine tool industry. According to analysis by professionals, it is expected that the compound growth rate of China's machine tool industry will be about 25-30 in the next five years. Among them, medium and high-end CNC machine tools will become the main force of growth. Judging from the development of China's current machine tool industry, self-produced CNC machine tools are still far from meeting the needs of the domestic market, especially the proportion of medium and high-end CNC machine tools is seriously low. From the statistics of 2011, from January to August, the average CNC production rate of China's machine tool industry was 30.94, 2.9 percentage points higher than 28.04 in the same period of 2010 (as shown in Figure 2), and the numerical control rate of machine tools in some developed countries reached Compared with the level of 70, the gap is more obvious. Especially in recent years, affected by the international financial crisis, German and Japanese machine tool companies have recovered rapidly, and they have entered China with low price and medium-end machine strategies. The market has responded well, which is also the development belt of China's medium and high-end CNC machine tool industry. There is tremendous competitive pressure. At the same time, mid-range machine tools from Taiwan and South Korea are also a force that cannot be ignored. According to statistics from China Machine Tool Industry Association, in the first three quarters of 2011, the import of metal processing machine tools was 9.91 billion US dollars, up 51.4% year-on-year. Due to the surge in imports, the market share of domestic metal processing machine tools and CNC machine tools showed a downward trend. . In order to change these statuses as soon as possible, in December 2008, with the support of the Ministry of Science and Technology and other ministries and commissions, Shenyang Machine Tool Group led the joint formation of 8 CNC companies and 6 institutes to form the CNC machine tool industry technology innovation alliance. Research work is carried out on the development of key functional components of high-speed precision CNC machine tools, the motion characteristics of high-speed precision machine tools, the cutting process of high-speed precision machine tools, and the application technology of numerical control systems. According to the relevant person in charge of the major special affairs office of the Ministry of Science and Technology, the CNC machine tool project officially launched in 2009 will continue until 2020. It is expected that the central government, local finance and enterprise investment will reach tens of billions of yuan, which indicates that CNC machine tools have become The key development direction of China's machine tool industry. The application of servo to the control of precision, speed and power in the application of CNC machine tools is the main goal of machine tool products. According to the fact that the numerical control technology of China's machine tool industry is still relatively backward compared with the international advanced level, it can be said that the slow development of high-quality functional components is one of the main reasons, and the performance of these functional components has a direct impact. The overall technical level of the mainframe is closely related to the development of the CNC machine tool industry, including the core component servo system for motion control. At present, in the practical application of the CNC machine tool industry, the AC servo system has obviously occupied a certain advantage; according to the different machine tool transmission machinery, the applied servo system is divided into two types: feed servo and spindle servo. (This article comes from: China Machine Tool Network)

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