Generalized bearing specialization is unstoppable
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The type, quantity, level and concentration of bearings have a major impact on the development of the entire bearing industry. Therefore, it has always been a key area for the development of the bearing industry. Low-vibration, no-distortion, high-precision special bearings, combined bearings, petrochemical machinery bearings, automotive, railway and other transportation industry bearings, engineering machinery bearings. The development speed of CNC equipment in these areas should be accelerated to continuously improve the manufacturing level and research and development speed of China's bearings, thereby improving the technical level and precision of bearings, shortening the production cycle of bearings, reducing costs and expanding the export of bearings. CNC equipment will play a very important role.
In the bearing manufacturing process, the extrusion mold of the steel plate stamping die and the plastic cage of the bearing cage, the stamping die of various rolling bodies, the high-precision die for the drawn outer ring of the needle bearing, the cold rolling die of the bearing ring and the forging die As well as machining and manufacturing of bearing assembly molds, high-efficiency and high-precision mold numerical control equipment is required. Because domestic CNC equipment can not meet its function and precision, some high-precision mold numerical control equipment in the bearing industry are imported, and some are solved by self-made equipment or modified equipment. Domestic equipment has huge demand, but the current occupation rate is low.
The specialized production of bearing products determines the development of CNC special production short-term according to the characteristics of the products. High precision, low noise, high volume and low cost are the key to producing motor bearings. At present, there are about 300 automatic grinding production lines for deep groove ball bearings in China. The numerical control technology has greatly improved the manufacturing level of low noise motors. The automatic grinding production line is currently manufactured from the automatic production line of miniature and small bearings to the manufacture of medium and large bearings. Automatic production line expansion. As a result, the requirements for numerical control technology are becoming more diverse and more difficult. In the automatic production line, active measurement technology, off-board detection technology, error automatic compensation technology, automatic monitoring of manufacturing quality, CNC timing transmission, quality analysis technology and other process control methods.
The automatic assembly of bearing assembly (including automatic detection and automatic packaging of finished products) has always been a problem that plagues technological progress. In the famous bearing company abroad, this technology has been successfully applied for many years. However, the domestic introduction by foreign countries, and the use effect is still not satisfactory. Therefore, the development of automatic assembly line for bearing assembly and organic connection with the automatic grinding production line of the bearing is significant for improving the production efficiency and product quality of the bearing, reducing the number of bearing parts in the process flow, reducing the influence of manual intervention and reducing the cost. of. Due to the variety of bearings and different types of automatic assembly lines, the bearing industry has put forward requirements for the diversity of numerical control equipment for bearing assembly.
The manufacture of bearing rollers is still dominated by single machines in China. The famous foreign bearing company is continuous production of grinding automatic line. At present, a small number of domestic enterprises have introduced the manufacturing equipment of Japanese companies. Due to the high price, the depreciation cost of equipment is high and cannot be promoted in China. Since the bearing roller is generally required to be 1~2μm, the 0-stage roller is required to be within 1μm, and the surface quality is strict. The bearing industry is eager to hope that the CNC equipment industry can provide a stable and reliable high-precision bearing roller automatic grinding production line and an automatic cleaning anti-rust packaging production line, and realize automatic detection and automatic feedback compensation processing error on the automatic line. Therefore, CNC technology has a lot to do here. Since the types of rollers are divided into four categories: cylindrical rollers, tapered rollers, needle rollers and spherical rollers, the numerical control industry should be developed to adapt to different automatic roller production lines according to the different characteristics of bearing rollers and different sizes.
Bearing steel balls are the most used rolling elements in the bearing industry. The post-process of steel ball production is automatic cleaning of steel balls, automatic appearance inspection (automatic rejection of non-conforming products), automatic rust prevention, counting and packaging, and foreign countries are also completed on the automatic production line. The domestic bearing industry has invested a lot of energy. After more than ten years of hard work, it has made some progress, but there is still a big gap compared with the advanced level. Since some precision requirements of steel balls have reached the nm level, the surface quality requirements are stricter than the bearing rollers, and the batch size is large, requiring high efficiency, high precision, high reliability and high cleanliness. Therefore, in this field, the demand of the bearing industry is very large, and the numerical control equipment industry can make a big difference.
With the continuous promotion and deepening of the traditional bearing manufacturing model with high-tech and advanced applicable technology, digital technology has become the development direction of the bearing industry. Bearing processing equipment using digital technology has become the first choice for bearing enterprises to improve equipment level. At the same time, the high-precision, high-efficiency, dedicated automatic production line has a good development prospect.
The bearing industry's general concerns and requirements for CNC equipment are as follows:
High reliability and timely and good after-sales service. This requirement is not unique to the bearing industry, but it is strongly reflected in the bearing industry. Mainly due to the production characteristics of the bearing industry is a continuous, high-volume production line, a device, a CNC automatic point problems, will cause the entire production line to stop work, loss. The disadvantage of the promotion of CNC automatic lines developed in China is largely due to the reliability of equipment and the lack of after-sales service.
The bearing industry has a high degree of specialization, CNC equipment must be adapted to it, special equipment and high degree of automation requirements. At present, domestic equipment can be used, but there is still a certain gap between reliability and precision, rigidity and stability, and good retention. Must be modified to meet the requirements. The bearing industry is the demand of a typical continuous production enterprise. Some enterprises work continuously 24 hours a day, and 1 to 3 days of maintenance time is concentrated in one month. The equipment must be operated at high speed and high efficiency for a long time. Therefore, it is very important that the equipment is automatically shut down, automatically alarmed, quickly diagnosed, and quickly eliminated. The bearing industry hopes that the CNC equipment industry will cooperate closely to comprehensively improve the manufacturing level of the bearing industry and achieve a win-win situation in cooperation between the two parties.