Although many types of rolling bearing, the structure type, grade of tolerance, material selection, processing methods are different, but the basic manufacturing process include the following contents: Bearing parts bearing parts inspection, cleaning, rust bearing parts demagnetizing bearing assembly bearing product inspection - bearing products, cleaning products bearing the demagnetization oiler packing bucket finished product storage.
The ring is an important part of rolling bearing, the rolling bearing of the variety, the different types of bearing rings of dimension, structure, fabrication using equipment, process and methods vary. Because the ferrule processing, complex process, high precision, therefore, the processing quality of the precision of the bearing ring, the service life and has an important effect on the performance.
Raw materials for manufacturing cylindrical ring bar or pipe material, according to different process, rolling bearing ring generally have the following manufacturing process.
1) (bar) feeding - forging annealing (or normalizing turning (cold rolling forming) - heat treatment quenching, tempering, grinding part inspection, cleaning and submitted to the assembly 2) (bar, pipe material blanking) - cold rolling forming and heat treatment quenching, tempering, grinding part inspection, cleaning and submitted to the assembly 3) (Guan Liao) - turning molding material: heat treatment quenching, tempering, grinding part inspection, cleaning and submitted to the assembly 4) (bar) feeding cold (warm) extrusion - turning - heat treatment quenching, tempering, grinding part inspection, cleaning and submitted to the assembly Ring forming method At present in the ring in the processing, molding methods mainly have the following several kinds: forging, turning forming, cold rolling forming and cold (warm) extrusion molding. The molding method, forging forming process is most widely used, accounting for about 80% of total production, for some small general products by rod (pipe) material directly turning molding. In twentieth Century 80 years, some of China's small and medium enterprises in the small ring used in the production of cold rolling and cold (warm) extrusion molding process. 1) forging By forging processing can eliminate the inherent defects of metal metal, improve the organization, the metal flow and rational distribution, metal close degree. Forging forming process widely used for bearings in the processing, can complete the process from small diameter ~20mm 5000mm products to the outer diameter of the oversize products. Forging forming method for common are: hot forging, cold forging, warm forging, hot forging based in china.
Hot forging processing because of its molding processing equipment of different is divided into: free forging process, press forging process, flat forging forging machine technology and high speed forging machine forging process. 2) cold rolling forming Cold ring rolling process is a kind of can improve material utilization rate, improve the metal structure compactness, maintain the advanced process of metal flow line, it is a chipless machining method. Theoretically speaking, the cold rolling forming products without turning can be directly used for heat treatment and grinding. At present, the cold rolling technology is applied to medium, small deep groove ball bearings, the main technological process: Forging blank (ring) - turning (except the channel (channel) - rolling and chamfer) two end face diameter as whole The cold rolling and forging forming process, the precision of products in addition to the equipment precision, but also is influenced by forming mold accuracy. 3) turning molding In the bearing industry, turning shaping the traditional technology is to use special lathe, using the process method to complete processing. But due to the equipment adjustment is difficult, the precision of the machine tool is low, the utilization rate of materials is low, so the process is to be eliminated. With the development of science and technology, CNC turning machine the rapid development and increasingly perfect. At present, some complex shape, high precision products are increasingly using NC turning molding technology. To sum up, the ring forming direction should be toward the metal high material utilization, high production efficiency, high forming precision direction. Therefore, high speed forging technology, cold ring rolling technology, CNC turning molding technology will be applied more and more.