First, the industrial production concentration is low. Among the world's bearing sales of about 30 billion dollars, the world's eight largest multinational companies account for 75%~80%. Germany's two major companies account for 90% of the total, Japan's five companies account for 90% of the total, and the United States one company accounts for 56% of the total. However, the sales of the 10 largest bearing enterprises in China, such as bearing shaft, accounted for only 24.7% of the total industry, and the production concentration of the top 30 enterprises was only 37.4%.
Second, the R&D and innovation capabilities are low. Weak basic theoretical research in the whole industry, weak participation in the formulation of international standards, few original technologies and few patented products.
At present, our design and manufacturing technology is basically imitated, and our product development ability is low, which is reflected in: although the matching rate of domestic main engines has reached 80%, the matching and maintenance bearings of important main engines such as high-speed railway passenger cars, medium and high-end cars, computers, air conditioners, and high-level rolling mills are basically imported.
Third, the level of manufacturing technology is low. The manufacturing process and equipment technology of the bearing industry in China are developing slowly, the CNC rate of turning is low, and the level of grinding automation is low. There are only more than 200 automatic production lines in China. Advanced heat treatment processes and equipment that are critical to bearing life and reliability, such as controlled atmosphere protective heating, double refining, bainite quenching, have low coverage, and many technical problems have not been solved. The research and development of new steel grades of bearing steel, the improvement of steel quality, and the research and development of lubrication, cooling, cleaning, abrasive tools and other related technologies cannot meet the requirements of improving the level and quality of bearing products. As a result, the process capability index is low, the consistency is poor, the product processing size dispersion is large, and the internal quality of the product is unstable, which affects the precision, performance, life and reliability of the bearing.
