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China's bearing industry currently faces three major outstanding issues
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China's bearing industry currently faces three major outstanding issues: namely, the low concentration of manufacturing industries, R & D and innovation is low, the low level of manufacturing technology.
First, the low concentration of manufacturing industries. Bearing in the world in sales of about $ 30 billion, the world's eight largest multinational companies accounted for 75% to 80%. Germany, the two companies accounted for 90% of the national total, Japan 5 accounted for 90% of the national total, the United States accounted for a 56% of the national total. While China ZWZ other 10 largest bearing company sales accounted for only 24.7% of the whole industry, the former 30's production concentration of only 37.4%.
Experts believe that the reasons for this situation: First, the original state-owned large enterprises due to institutional and structural problems, the relatively slow development; Second, the advantage of private, the private sector is still in the growth stage; Third, low-level redundant construction, industry Factory points are too scattered, General Bearing serious excess capacity.
Second, R & D and innovation capacity is low. Since most enterprises in the innovation system construction and operation, R & D and innovation funding, human resources development and other aspects are still at a low level, coupled with industry-oriented research institutes towards enterprise services, the state has no common industrial technology research investment, thus weakening the industry-oriented research and development functions. Therefore, the whole industry, "two weak two less" prominent, namely the weak basic theoretical research, participation in international standard-setting is weak, less original technology, less patented products.
At present, our design and manufacturing technology is basically imitated, consistent system for decades. Product development capacity, manifested in: Although the domestic host matching rate of 80%, but the high-speed railway passenger cars, upscale cars, computers, air conditioners, high rolling mill and other important host support and maintenance bearings, basically rely on imports.
Third, the low level of manufacturing technology. China's bearing industry manufacturing processes and process equipment and technology development is slow, low CNC lathe, grinding low level of automation, there are only more than 200 automatic production lines. Most enterprises, especially state-owned enterprises as the old main production is still legacy devices. On bearing life and reliability of the critical heat treatment of advanced technology and equipment, such as control of protective atmosphere heating, double refinement, bainite hardening low coverage, many technical problems research failed to achieve a breakthrough. Bearing steel research and development of new steel grades, improve the quality of steel, lubrication, cooling, cleaning and abrasives, and other related technology research and development, still can not meet the standards and improve the quality of products bearing requirements. Resulting process capability index is low, poor consistency, product processing size dispersion, product quality is unstable and affect the intrinsic bearing accuracy, performance, life and reliability.
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