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Eight major problems in the bearing industry require six major measures to improve
Industry status and existing problems In the bearing industry, as far as the bearing industry as a whole is concerned, through the quality inspection and supervision in recent years, although the product quality has improved, the structure of individual enterprise products is still unreasonable, mainly the following quality problems and causes : 1, the end face size is out of tolerance. The reason is that the producers' responsibility is not strong, and the thickness and fineness process are combined into one grinding, which is not caused by timely inspection. 2. The inner and outer diameters are out of tolerance. Mainly because the operator's technical level is too low, the isothermal time of the ferrule is not enough, and the accuracy of the instrumentation is not enough. 3, the clearance does not meet the requirements. The technical level of the combined workmanship is low and not carefully checked, and the flow tolerance is not allowed. 4. The residual magnetic flux of the finished bearing is seriously exceeded. Mainly due to the residual magnetic flux of the roller, the reason is that some roller manufacturers do not have a demagnetizer, although some have, but the capacity and power can not meet the requirements, can not retreat residual magnetism. 5, the hardness does not meet the standard requirements. Mainly due to unqualified raw material quality and heat treatment. 6, the roller's positive runout and mutual difference can not meet the requirements. The main reason is that the accuracy of the machine tool is not high, and the company can reduce the production cost without authorization. 7. The roughness of the roller is unqualified. Mainly in the process of coarse, fine and final grinding process, in order to reduce the production cost and reduce the production process, the grinding wheel used does not reach the specified particle size. 8. The center distance of the cage hole is large and the bottom thickness is not uniform. The main reason is that the company does not have self-checking equipment, can not control the quality, and the machining accuracy of the machine tool is low. Measures to be improved With the development and revitalization of the old industrial bases in Northeast China, in order to further improve the quality index evaluation of the bearing industry in the province, the Wafangdian Quality Inspection Institute should focus on strengthening the following aspects: 1. Bearing products in Dalian Relying on the quality supervision and inspection station, the company continued to increase its service to the enterprise and carried out systematic inspections from raw materials, semi-finished products to finished products. 2. On the basis of honesty, pragmatism and innovation, we will help enterprises and improve the quality of bearing products. 3. Extensively carry out various forms of entrusted inspection and expand the scope of services. 4. Strengthen the self-construction of quality inspection institutions, absorb talents, and improve inspection capabilities. 5. Continue to improve the technical conditions, enrich the inspection equipment, and reach the first-class laboratory level in the same industry in China. 6. Coordinating the relationship with the enterprise, the relationship between the enterprise and the relevant government departments, serving as the government's good staff, and acting as a good helper for the enterprise, thus promoting the health of the entire bearing industry chain.