2022/12/15
At present, China's bearing industry is mainly faced with three prominent problems
At present, China's bearing industry is mainly faced with three prominent problems: low industrial production concentration, low R&D and innovation capacity, and low manufacturing technology level.
At present, China's bearing industry is mainly faced with three prominent problems: low industrial production concentration, low R&D and innovation capacity, and low manufacturing technology level.
First, the industrial production concentration is low. Of the world's bearing sales of about US $30 billion, the world's eight largest multinational companies account for 75% to 80%. Germany's two largest 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, China's top 10 bearing enterprises, such as tile shaft, account for only 24.7% of the industry's sales, and the production concentration of the top 30 is only 37.4%.
Second, the R&D and innovation capabilities are low. The basic theoretical research of the whole industry is weak, the participation in the formulation of international standards is weak, and there are fewer original technologies and fewer patented products.
At present, our design and manufacturing technology is basically imitation, and our product development capacity is low, which is reflected in that although the matching rate of domestic main engines reaches 80%, the matching and maintenance bearing 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 process equipment technology of China's bearing industry is developing slowly, the NC rate of turning is low, and the level of grinding automation 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 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 and abrasive tools and other related technologies can not 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 dimension dispersion is large, and the internal quality of the product is unstable, which affects the accuracy, performance, life and reliability of the bearing.
Other news
Kejie Bearing now has more than 20 professional bearing production lines, and has advanced automatic production lines, complete testing equipment and experimental equipment to ensure stable quality. In addition to the production of conventional bearings, we can also design and produce various non-standard bearings according to the personalized requirements of customers.
Release time:
2022/11/20
Ningbo Kejie Bearing Co., Ltd. was founded in 2008 and is now located in Wanyang Maker City, Yuyao City, Ningbo, with a plant area of 5000m ²。 Kejie Bearing is committed to developing Φ 3～ Φ The NBKJ-B bearing has the characteristics of low vibration, low noise, low friction, high precision, high sealing, high revolution and long life. The products are widely used in household appliances, small motors, electric tools, computers, power equipment, sports equipment and other transmission devices.
Release time:
2022/11/20
Ningbo Kejie Bearing Co., Ltd. was founded in 2008
Ningbo Kejie Bearing Co., Ltd. was founded in 2008 and is now located in Wanyang Maker City, Yuyao City, Ningbo, with a plant area of 5000m ²。 Kejie Bearing is committed to developing Φ 3～ Φ The NBKJ-B bearing has the characteristics of low vibration, low noise, low friction, high precision, high sealing, high revolution and long life. The products are widely used in household appliances, small motors, electric tools, computers, power equipment, sports equipment and other transmission devices.
Release time:
2022/11/20
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