According to data of National Bureau of Statistics, 2011 China bearing Manufacturing Industry scale (annual sales income of more than 20 million yuan) enterprises a total of 1416 enterprises, the entire year to achieve industrial output value of 193.211 billion yuan, growth of 27.59%; sales revenue of 191.097 billion yuan, the increase of 30.3% , with a total profit of $12.523 billion, which grew by 26.54% over the previous year. It is expected that by 2015, China's bearing production is expected to exceed 28 billion sets, the main business income is expected to reach 210 billion yuan, become the world's largest bearing production and sales base.
At present, the bearing industry of our country is confronted with three major problems: low production concentration, low research and innovation ability and low manufacturing technology.
First, the production concentration of the industry is low. The world's 8 largest multinationals account for about $30 billion trillion of 75%~80% worldwide sales. Germany's two largest companies accounted for 90% of the country's total, Japan's 5 accounted for its national total of 90%, the United States accounted for 1 of the national total of 56%. And China tile axis, such as 10 of the largest bearing enterprises, sales accounted for only 24.7% of the industry, the first 30 production concentration is only 37.4%.
Second, the development and innovation capacity is low. The whole industry basic theoretical research weak, participate in the development of international standards weak, less original technology, less patented products.
At present, our design and manufacturing technology is basically imitation, product development capability is low, performance in: Although the matching rate of domestic mainframe to reach 80%, but high-speed railway passenger cars, high-grade cars, computers, air conditioners, high level mill and other important host supporting and maintenance of bearings, basically by imports.
Third, low manufacturing technology. China's bearing industry manufacturing process and process equipment technology development slow, the car processing CNC rate is low, grinding automation level is low, the country has only more than 200 automatic production lines. The advanced heat treatment technology and equipment, such as control atmosphere protection heating, double refinement, bainite quenching and so on, are very important to the bearing life and reliability, and many technical problems have not been breakthrough. The development of new steel grades of bearing steels, the improvement of steel quality, lubrication, cooling, cleaning and abrasive abrasives and other related technology research and development, can not adapt to the bearing product level and quality improvement requirements. As a result, the process capability index is low, the consistency is poor, the product processing size dispersion is big, the product intrinsic quality is unstable and affects the bearing precision, performance, life and reliability.
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