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Bearing industry

Cloth in:2014-10-25    Hits:5682

According to the national bureau of statistics, in 2011 China bearing manufacturing industry scale (annual sales revenue of 20 million yuan of above) a total of 1416 enterprises, the annual gross value of industrial output achieved 193.211 billion yuan, up 27.59%; Sales income is 191.097 billion yuan, up 30.30%; Profit total 12.523 billion yuan, year-on-year growth of 26.54%. By 2015, our country bearing production is expected to more than 28 billion sets, advocate business wu income is expected to reach 210 billion yuan, to become the world's largest bearing production and sales base.

The three prominent problems in the bearing industry of our country: are the industry production of low concentration, low r&d and innovation ability, low level of manufacturing technology. [2]

First, the industry concentration is low. In bearing about $30 billion in sales in the world the world eight big multinational companies accounted for 75% ~ 80%. Germany's two big companies accounted for 90% of the national total, Japan five account for 90% of the national total, the United States 1 accounted for 56% of the national total. And our country wazhou ten biggest bearing enterprises, such as sales accounts for only 24.7% of the whole industry, top 30 production concentration is only 37.4%.

Second, research and development and the innovation ability is low. The industry foundation weak theory research, participate in international standards is weaker, less original technology, patent products.

Current we basically is to imitate the design and manufacturing technology, product development ability is low, displays in: although the domestic host matching rate reached 80%, but the high-speed railway passenger cars, luxury cars, computers, air conditioner, high levels of rolling mill, and other important host supporting and maintenance of the bearing, basically rely on imports.

Third, the low level of manufacturing technology. China bearing industry manufacturing technology and process equipment and technology development is slow, the car processing nc rate is low, grinding automation level is low, only more than 200 automatic production line. Is very important to bearing life and reliability of advanced heat treatment technology and equipment, such as controlled atmosphere protection heating, double refinement, bainite hardening, such as low coverage, many technical problems research failed to make a breakthrough. Bearing steel research and development of new steel grade and the improvement of steel quality, lubrication, cooling, cleaning and grinding tools and other related technology research and development, cannot adapt to the requirement of bearing product level and quality. Thus lead to the low process capability indices, poor consistency, product processing discrete degree of big size, product quality is not stable and inner influence the accuracy, performance, life and reliability of the bearing.

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