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TIMKEN bearing type a number, its structure, tolerance levels, differences in material selection, processing methods, but its basic manufacturing process includes the following:
1, axle bearing parts-bearing checking demagnetization-bearing parts, cleaning, rust-bearing Assembly-bearing finished product inspection finished demagnetization, washing-bearings-bearings finished oil packing the finished.
2, ring is important part of TIMKEN bearings, due to the variety of TIMKEN bearings, making different types of bearing rings of sizes, structures, equipment and technology used in manufacturing methods vary. Due to complex machining processes, processes of races, high accuracy requirements, therefore, accuracy of machining quality of bearing rings, and life has an important impact on performance.
3, ring manufacturing raw materials for the cylindrical bar or tube, under the molding process is different, TIMKEN bearing rings generally have several manufacturing processes.
1) (bar)-forging-annealed under (or normalizing-turning (cold rolling)-heat treatment quenching, tempering-grinding-parts inspection-demagnetization, washing-submitted to the Assembly.
2) (billets, tubes) cutting-cold rolling tempering-molding-quenching heat treatment, grinding-parts inspection-demagnetization, washing-submitted to the Assembly.
3) (tube) heat treatment quenching, tempering forming-blanking-turning-grinding-parts inspection-demagnetization, washing-the introduction of Assembly
4) (bar) cutting-cold (warm)-heat treatment quenching, tempering extrusion-turning-grinding-parts inspection-demagnetization, washing-the introduction of Assembly
Ring molding method:
Currently in the processing of ferrules, shaping methods mainly in the following ways: forged, turning forming, cold rolling and cold (warm) extrusion. Molding method above, forging forming the most widely used, accounting for 80% per cent of total production, products can be used for some small utility class rods (tubes) direct cutting molding. Since in the 1980 of the 20th century, some small and medium enterprises in China in the production of small and medium ring by cold rolling and cold (warm) extrusion molding technology.
1) forging
By forging process can eliminate metal inherent defects, improving the metallic structure, reasonable metal streamline distribution, metal tightness good. Forging forming process widely used in bearing processing can be done from small product outer diameter inner diameter ~20mm 5000mm mega-product processing. Common forging method: Hot forging, cold forging, warm forging process, dominated by hot forging.
Hot forging process due to different processing facilities are divided into: free forging machining, forging machines, presses, forging process forging technology and forging technology of high speed heading machine.
2) cold rolling forming
Cold rolling process is a way to improve material utilization, improve the Organization of dense metal, keep the metal flow of advanced technology, it is a chipless machining methods. In theory, cold rolling forming of products without turning to direct heat treatment and grinding processes. At present, the cold rolling technology are mainly used in small and medium deep groove ball bearing, its main processes are:
Forging blanks (ring)-turning (except channel)-rolling (Groove and chamfer) both ends of the trail-polishing pad surface.
During cold rolling and forging forming processes, accuracy in addition to precision effects, also under the influence of molding precision.
3) turning:
In the bearing industry, the traditional forming technology is used in turning lathe, centralized operation law finished forming. But because of the method used by the device to adjust low difficulty, machine tool accuracy, low material utilization, so the process is being phased out.
With the development of science and technology, CNC lathe for rapidly developing and increasingly sophisticated. At present, some form complex, high-precision molding technology products are increasingly used CNC turning.
To sum up, rings forming metallic materials should be directed towards high usage, high production efficiency, high accuracy direction. Therefore, high speed forging technology, cold-rolling technology, forming technology for NC turning will get more and more applications.
| Product Model | Inside Diameter | Outside Diameter | Thickness |
| 4T-30214 NTN | 70 | 125 | 24 |
| 4T-33014 NTN | 70 | 110 | 31 |