At present, China's bearing industry mainly faces three major problems: low concentration of production in the industry, low R&D and innovation capability, and low level of manufacturing technology.
First, the industry's production concentration is low. Of the world's approximately $30 billion in sales, the world's eight largest multinational companies account for 75% to 80%. Germany's two major companies account for 90% of the country's total, five in Japan accounted for 90% of the country's total, and the United States accounted for 56% of its national total. The 10 largest bearing companies in China, such as Wazhou, account for only 24.7% of the industry's total sales, and the top 30 production concentration is only 37.4%. Experts believe that the reasons for this situation: First, the original state-owned large enterprises due to institutional and institutional problems, the development is relatively slow; second, the advantages of private and private enterprises are still in the growth stage; third, low-level redundant construction, industry The factory points are too scattered, and the general bearing capacity is seriously overcapacity.
Second, the ability to develop and innovate is low. Since most enterprises are still at a low level in the construction and operation of innovation systems, capital investment in research and development and innovation, and talent development, and the research institutes facing industry services are becoming more and more enterprise-oriented, the state has no research on common technologies in the industry. Investing, thus weakening the function of research and development for the industry. Therefore, the industry's "two weak and two less" is prominent, that is, weak basic theoretical research, weak participation in the formulation of international standards, less original technology, and less patented products. At present, our design and manufacturing technology is basically imitated and has been consistent for decades. The product development capability is low. The performance is as follows: Although the matching rate for domestic mainframes reaches 80%, the supporting and maintenance bearings for high-speed railway passenger cars, medium and high-end cars, computers, air conditioners, high-level rolling mills and other important mainframes are basically imported.
Third, the level of manufacturing technology is low. China's bearing industry manufacturing process and process equipment technology is developing slowly, the CNC machining rate is low, and the grinding processing automation level is low. There are only more than 200 automatic production lines in the country. Most enterprises, especially state-owned and old enterprises, are still the traditional equipment as the main production force. Advanced heat treatment processes and equipment that are critical to bearing life and reliability, such as controlled atmosphere protection heating, double refinement, bainite quenching, etc., have low coverage, and many technical problems have failed to make breakthroughs. The research and development of new steel grades for bearing steel, the improvement of steel quality, the development of related technologies such as lubrication, cooling, cleaning and abrasives are still not suitable for the requirements of bearing product level and quality improvement. As a result, the process capability index is low, the consistency is poor, the product processing size dispersion is large, and the inherent quality of the product is unstable, which affects the accuracy, performance, life and reliability of the bearing.
First, the industry's production concentration is low. Of the world's approximately $30 billion in sales, the world's eight largest multinational companies account for 75% to 80%. Germany's two major companies account for 90% of the country's total, five in Japan accounted for 90% of the country's total, and the United States accounted for 56% of its national total. The 10 largest bearing companies in China, such as Wazhou, account for only 24.7% of the industry's total sales, and the top 30 production concentration is only 37.4%. Experts believe that the reasons for this situation: First, the original state-owned large enterprises due to institutional and institutional problems, the development is relatively slow; second, the advantages of private and private enterprises are still in the growth stage; third, low-level redundant construction, industry The factory points are too scattered, and the general bearing capacity is seriously overcapacity.
Second, the ability to develop and innovate is low. Since most enterprises are still at a low level in the construction and operation of innovation systems, capital investment in research and development and innovation, and talent development, and the research institutes facing industry services are becoming more and more enterprise-oriented, the state has no research on common technologies in the industry. Investing, thus weakening the function of research and development for the industry. Therefore, the industry's "two weak and two less" is prominent, that is, weak basic theoretical research, weak participation in the formulation of international standards, less original technology, and less patented products. At present, our design and manufacturing technology is basically imitated and has been consistent for decades. The product development capability is low. The performance is as follows: Although the matching rate for domestic mainframes reaches 80%, the supporting and maintenance bearings for high-speed railway passenger cars, medium and high-end cars, computers, air conditioners, high-level rolling mills and other important mainframes are basically imported.
Third, the level of manufacturing technology is low. China's bearing industry manufacturing process and process equipment technology is developing slowly, the CNC machining rate is low, and the grinding processing automation level is low. There are only more than 200 automatic production lines in the country. Most enterprises, especially state-owned and old enterprises, are still the traditional equipment as the main production force. Advanced heat treatment processes and equipment that are critical to bearing life and reliability, such as controlled atmosphere protection heating, double refinement, bainite quenching, etc., have low coverage, and many technical problems have failed to make breakthroughs. The research and development of new steel grades for bearing steel, the improvement of steel quality, the development of related technologies such as lubrication, cooling, cleaning and abrasives are still not suitable for the requirements of bearing product level and quality improvement. As a result, the process capability index is low, the consistency is poor, the product processing size dispersion is large, and the inherent quality of the product is unstable, which affects the accuracy, performance, life and reliability of the bearing.
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Diding Numerical Control Technology Co., Ltd. , http://www.njengravingmachine.com