According to data from the National Bureau of Statistics, in 2011, there were 1,416 enterprises in China's bearing manufacturing industry (annual sales revenue of more than 20 million yuan). The total industrial output value of the year was 193.211 billion yuan, a year-on-year increase of 27.59%; sales revenue was 191.097 billion yuan. A year-on-year increase of 30.30%; total profit of 12.523 billion yuan, an increase of 26.54% over the previous year. It is estimated that by 2015, my country's bearing output is expected to exceed 28 billion sets, and the main business income is expected to reach 210 billion yuan, making it the world's largest bearing production and sales base.
At present, my country's bearing industry is facing three major problems: low concentration of industry production, low R&D and innovation capabilities, and low manufacturing technology.
First, the industry's production concentration is low. The world's 8 largest multinational companies account for 75% to 80% of the approximately US$30 billion in sales of bearings in the world. Two German companies accounted for 90% of the country's total, Japan's five companies accounted for 90% of the country's total, and the United States accounted for 56% of the country's total. However, the sales of the 10 largest bearing companies such as my country's Wazhou Bearing accounted for only 24.7% of the entire industry, and the production concentration of the top 30 was only 37.4%.
Second, the R&D and innovation capabilities are low. The industry's basic theoretical research is weak, the participation in the formulation of international standards is weak, and there are few original technologies and few patented products.
At present, our design and manufacturing technology is basically imitated, and our product development capabilities are low. This is reflected in the fact that although the supporting rate for domestic mainframes has reached 80%, high-speed railway passenger cars, mid-to-high-end cars, computers, air conditioners, high-level rolling mills, etc. are important The main engine's supporting and maintenance bearings are basically imported.
Third, the level of manufacturing technology is low. The development of my country's bearing industry manufacturing technology and process equipment technology is slow, the CNC rate of turning processing is low, and the level of automation of grinding processing is low. There are only more than 200 automatic production lines in the country. 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 achieve breakthroughs. The research and development of new bearing steel grades, the improvement of steel quality, and the research and development of related technologies such as lubrication, cooling, cleaning and abrasives have not yet been able to meet the requirements of the improvement of bearing product level and quality. 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 accuracy, performance, life and reliability of the bearing.