China's rolling functional components industry is not concentrated in production, single product variety, low gold content, and there is no well-known brand in the international market, which has become the bottleneck of the development of domestic CNC machine tools. Therefore, it is necessary to accelerate the industrialization of rolling functional components in China.
Rolling feature products include: ball screw pair, rolling linear guide pair, ball spline, ball guide sleeve, linear motion component, coordinate table, self-locking device, etc. They are characterized by "rolling" and have the functions of high efficiency, energy saving, precise positioning, precise guidance, fast response to CNC commands, high speed, synchronization and reversibility of the transmission. They are the irreplaceable key for CNC machine tools and mechatronics products. The matching kit is also an important basic component that meets the 21st century ecological and environmental protection concepts. Their products are small, but they integrate many key technologies for precision parts manufacturing. Due to their high standardization, serialization, high degree of generalization, and a broad market, it is very conducive to the organization of specialized mass production.
At present, China industry status <br> <br> rolling feature manufacturers have 50 (excluding Taiwan Province), research institutes, colleges and universities a total of three, three companies affiliated research institutes. There are 48 enterprises producing ball screws, with an annual output value of 650 million yuan. There are 6 companies producing rolling linear guides (four of which simultaneously produce ball screws), with an annual output value of 150 million yuan. Among the 50 enterprises, there are 6 enterprises with large production scale, complete technology and equipment, large output and many varieties. Most of the other enterprises are small in scale, low in output and single in product variety.
Domestic rolling functional components have been used in many fields in the equipment manufacturing industry: up to "Fengyun 2" satellites, missile guidance systems, space capsule space transmission devices, radar devices, airport equipment, down to various CNC machine tools, IT industry Metallurgical equipment, railway vehicles, nuclear power plants, plastic machinery, medical equipment, etc.
From a global perspective, although China's rolling functional component industry is the country with the largest number of manufacturers, its production is not concentrated, its distribution is unreasonable, and its total output and output value are not high. Except for some of the key key enterprises, some products reach or are close to foreign countries. Enterprises can only produce medium and low-end products, and the varieties are single and the gold content is low. So far, there is no well-known brand that has influence in the world, and there is no listed company.
The main gap between China's rolling functional component industry and foreign countries is that the professional production level is not high; the information management is lagging behind; the industrialization process is slow; the personalized service can't keep up. From the overall level of products, we are under the famous brand products of developed countries, and the middle-to-high level above the developing countries. The gap between the middle and low-end products and similar foreign products is small or basically flat, but the production efficiency is far lower than that of foreign countries. High-performance, high-end products (high-speed, high-precision, high-precision, low-noise, etc.) have obvious gaps with well-known companies such as NSK, THK, and Rexroth, and have become the bottleneck restricting the development of domestic high-end CNC machine tools.
Foreign <br> <br> trends and product development trend of the overall level of foreign rolling feature industry has the following characteristics:
——The scale of production is large, the level of information management is high, and the series of products that meet the individual needs of users are provided with the cost and speed of large-scale intensive manufacturing.
——The company has strong capital and rapid industrialization.
——The product originality is strong, the new product research and development speed is fast, and the response to the market demand is very sensitive. Every year, a number of new products with independent intellectual property rights of the times are launched, and patents are quickly applied.
——High level of technology, high numerical control rate, high production efficiency and stable product quality.
——With advanced testing instruments and product performance testing equipment, it provides quality assurance for the development of mass-produced products and new products, and wins users with test data and performance comparison curves.
-- Software services that not only provide users with the hardware they need, but also provide solutions for users.
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