Rolling bearing manufacturing ring forming processing

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Although many types of rolling bearing, and its structure and tolerance grade, material selection, processing method exists difference, but its basic manufacturing process consists of the following contents:ball bearing manufacturer
Bearing parts manufacturing - bearing parts inspection - bearing parts demagnetization, cleaning, rust - bearing assembly - bearing product inspection - bearing finished demagnetization, cleaning - bearing finished oil packing bucket to finished product.
Ring rolling bearing is an important part, due to the variety of rolling bearing, make different types of bearing ring size, structure, make use of the equipment and technical methods etc each are not identical. Also, because ring processing procedures, process complicated and machining precision demand is high, therefore, ring processing quality on bearing accuracy, service life and performance has the important influence.
Ring manufacturing raw materials for cylindrical bar or tube material, at present according to the molding process is different, the rolling bearing ring generally have the following several kinds of manufacturing process.
1) (bar) blanking - forging, an nealing (or normalized - turning (cold roll forming) - heat treatment quenching and tempering - grinding - parts inspection, demagnetism, their cleaning - submit assemblydouble row bearing
2) (bar, pipe material) blanking - cold roll forming - heat treatment quenching and tempering - grinding - parts inspection, demagnetism, their cleaning - submit assembly
3) (tube material) blanking - turning molding - heat treatment quenching and tempering - grinding - parts inspection, demagnetism, their cleaning - submit assembly
4) (bar) blanking - cold (temperature) extrusion forming - turning - heat treatment quenching and tempering - grinding - parts inspection, demagnetism, their cleaning - submit assembly
Ring forming method
At present in the ring processing, molding methods mainly have the following kinds: forging forming, turning molding, cold rolling forming and cold extrusion (tempera ture). In the above molding method, forging forming applied most widely, accounting for about 80% of the total production, for some small general products can use bar (tube) material directly turning forming. Since the 1980 s, our country some small and medium enterprises in the production of small and medium-sized ring is adopted in cold rolling and cold (temperature) extrusion forming process.
1) forging forming
Through the forging processing can remove the metal internal defects, improve metal organization, makes the metal streamline distribution is reasonable, metal tightness good. Forging forming technology are widely used in bearing molding processing, can complete from inside ~ 20 mm small products to 5000 mm diameter of large product processing. Common forging forming method is: hot forging processing, cold forging processing, temperature forging processing, our country in hot forging is given priority to.ball bearing companies
Hot forging processing because of its different forming equipment and is divided into: free forging processing technology, press forging technology, the hammer forging machine forging process and high speed upsetting machine forging technology.
2) cold roll forming
The ring rolling process is a kind of can improve material utilization, improve the metal organization compactness, keep the metal flow linear advanced technology method, it is a chipless machining method. Theoretically, cold roll forming products need not turning can be directly heat treatment and grinding processing. At present, the ring rolling process is mainly used in medium and small deep groove ball bearing, the main process for:
Forging blank (ring) - turning (except channel) - rolling (groove and chamfering) the whole diameter - soft grinding two endchina ball bearing
The co ld rolling process and forging forming technology, the dimension precision of products in addition to the effect on accuracy by equipment outside, but also by the influence to the precision of forming dies.
3) turning forming
In the bearing industry, the traditional turning molding technology is to use a special lathe, USES the concentration process method is used to complete processing. But as a result of this method USES the equipment adjusting difficulty big, machine tool low accuracy, low material utilization ratio, so the process methods are being phased out.
With the development of science and technology, the numerical control turning machine rapid development and increasingly perfect. At present, some complex shape, high accuracy products are increasingly using the numerical control turning molding technology.
To sum up, ring forming direction should be to metal material utilization high, high efficiency, high precision forming the direction of dev elopment. Therefore, high speed upsetting technology, cold rolling technology, the numerical control turning molding technology will get more and more applications.deep groove ball bearing