In recent years, the domestic rotary bearing industry has rapidly expanded its production scale, ranking fourth in the world, and the domestic rotary bearing industry has rapidly expanded its production scale. There are nearly 2,000 rotary bearing companies, of which more than 900 have sales revenues of over 5 million yuan. Called the world first. However, the rotary bearing industry in China still has problems such as low level of manufacturing technology and low concentration of the industry, and it is still a long way away from the power of rotary bearings.
1. China's rotary bearing industry has low production concentration.
Of the world’s turnover of around US$30 billion in rotary bearing bearings, the world’s eight largest multinational companies accounted for 75-80. Germany's two major companies accounted for 90 of its national total, Japan 5 accounted for 90 of its national total, and the United States accounted for 56 of its national total. In China, seven wheel bearing enterprises with annual sales of more than RMB 1 billion, such as tile shafts, accounted for only 28.3 percent of the industry's total sales. The production concentration of the top 30 companies was only 43.6.
2. China's rotary bearing industry has low R&D and innovation capabilities.
Since most companies are still at a low level in the construction and operation of innovation systems, capital investment in R&D and innovation, and talent development, and with the development of scientific research institutes oriented to industry services, the country has no research on common technologies in the industry. The investment has weakened the R&D capabilities for the industry. Therefore, the whole industry is characterized by “two weak and two weak”, that is, basic theoretical research is weak, participation in the formulation of international standards is weak, less original technology, and less patented products. At present, our design and manufacturing technologies are basically analog and have been consistently implemented for decades. The product development capability is low. The performance is as follows: Although the matching rate for domestic hosts reaches 80, the matching and maintenance of slewing bearings for high-speed railway passenger cars, medium and high-end passenger cars, computers, air conditioners, and high-level rolling mills are basically imported.
3, China's rotary bearing industry manufacturing technology is low.
China's rotary bearing industry manufacturing process and technology equipment development is slow, the car processing CNC low rate, low level of grinding processing automation, the country has only 200 automatic production lines. Most enterprises, especially state-owned and old enterprises, still have traditional equipment as their main production force. Advanced heat treatment processes and equipment that are critical to the life and reliability of the slewing ring bearing, 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 types of steel for rotary bearing steel, the improvement of the quality of steel products, and the development of related technologies such as lubrication, cooling, cleaning, and abrasives, etc., have not yet been able to meet the requirements for the level and quality of turntable bearing products. As a result, the process capability index is low, the consistency is poor, the dispersion of the product processing size is large, and the internal quality of the product is unstable, which affects the accuracy, performance, life, and reliability of the slewing bearing.
In view of the above situation, China proposed the "Eleventh Five-Year Plan" of the rotary bearing industry. China's rotary bearing industry will be market-oriented, with enterprises as the main body, promote independent innovation capability and upgrade the design and manufacturing technology, and promote large-group and "little giant" enterprises. Construction, improve core competitiveness, increase production concentration, and achieve transformation from scale-up to quality-benefit. In 2010, some products of some companies reached the level of international competitiveness and laid the foundation for becoming one of the world’s leading manufacturers of rotary bearing bearings; by 2020, they will achieve the goal of becoming a world’s largest supplier of rotary bearing bearings, and accelerate the revitalization of China’s equipment manufacturing. Industry contributes. In 2020, we will achieve the goal of strengthening the world's rotary bearing bearings, product precision, performance, longevity and reliability to reach the level of similar products of major foreign companies during the same period, and the realization of localization of major equipment supporting turntable bearings: design and manufacturing technologies have reached the level of large companies outside the same period, and there are a number of Independent intellectual property rights of core technologies; 3-5 companies with independent intellectual property rights and world-renowned brands and strong international competitiveness; the total scale of production and sales in the industry ranks among the top in the world, with 2-3 domestic-funded holding companies entering World's top 10 rotary table bearing sales; industry production concentration reached 80 or more.
