The bearing industry is faced with three major outstanding problems

Time：

Sep 13,2022

First, the industrial production concentration is low. In the world's bearing sales of about 30 billion US dollars, the world's eight largest multinational companies account for 75% ~ 80%. Two large German companies account for 90% of its national total, five Japanese companies account for 90% of its national total, and one American company accounts for 56%. However, the sales volume of the 10 largest bearing enterprises, such as tile shaft, only accounts for 24.7% of the whole industry, and the production concentration ratio of the top 30 enterprises is only 37.4%. Second, low capacity for R&D and innovation. The basic theory research of the whole industry is weak, the participation in the formulation of international standards is weak, and the original technology and patented products are less.

At present, our design and manufacturing technology is basically imitation, and the product development capacity is low. Although the matching rate of domestic main engines reaches 80%, the supporting and maintenance bearings of important main engines, such as high-speed railway passenger cars, middle and high-end cars, computers, air conditioners and high level rolling mills, basically rely on imports.

Third, the level of manufacturing technology is low. Our bearing industry manufacturing technology and technology equipment development is slow, CNC machining rate is low, grinding machining automation level is low, the whole country only more than 200 automatic production line. Advanced heat treatment processes and equipment, which are crucial to bearing life and reliability, such as controlled atmosphere protective heating, double refinement, bainite quenching, etc. have low coverage, and many technical problems have not been solved to achieve breakthroughs. The research and development of new types of bearing steel, the improvement of steel quality, the research and development of lubrication, cooling, cleaning and abrasives and other related technologies cannot meet the requirements of the improvement of bearing product level and quality. As a result, the process ability index is low, the consistency is poor, the product processing size is large, the internal quality of the product is unstable and affects the accuracy, performance, life and reliability of the bearing.

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