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Improve the metal structure compactness, maintain the advanced technique for metallic flow linear, it is a chipless machining method. Theoretically, the cold rolling forming products without turning can be directly used for heat treatment and grinding. At present, the ring rolling process is applied to medium, small deep groove ball bearings imports, the main technological process:
Forging blank (ring) - turning (except the channel) - rolling (ditch and chamfer size - two) the whole end face polishing.
The use of cold ring rolling process and forging forming process, the precision of the product except by the equipment precision influence, but also is influenced by forming mold accuracy.
3) turning molding:
In the imported bearings industry, turning forming the traditional technology is to use special lathe, using centralized process method to complete the molding processing. But because the method used equipment adjust difficulty big, the precision of the machine tool, low material utilization rate is low, so the process is to be eliminated.
With the development of science and technology, CNC turning machine and the rapid development of increasingly perfect. At present, some complex shape, high precision products are used more and more widely in NC turning molding technology.
To sum up, ring molding processing should be the direction toward the metal high material utilization, high production efficiency, high molding precision direction. Therefore, high speed forging technology, cold ring rolling technology, CNC turning molding technology has been applied more and more.