Analysis of the forming of the rolling bearing

Source: China Bearing Network Time: 2013-10-11

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The original material produced by the ferrule is a cylindrical bar or tube; currently the molding process is different; the rolling bearing ferrule usually has the following production processes.
a. (Bar) Cutting-casting-annealing (or normalizing-turning (cold forming)-heat treatment quenching, tempering-grinding-parts view-demagnetization, cleaning-submitting installation b. (bar, tube) Material - Cold Head Forming - Heat Treatment Quenching, Tempering - Grinding - Parts View - Demagnetization, Removal - Submit Installation c. (Tubing) Cutting - Turning Forming - Heat Treatment Quenching, Tempering - Grinding - Parts View - Demagnetization, Clear - submit installation d. (bar material) blanking - cold (warm) kneading - turning - heat treatment quenching, tempering - grinding - parts view - demagnetization, removal - submit installation ring forming method: currently in the ferrule In the processing; molding methods are mainly the following: casting molding, turning molding, cold expansion molding and cold (warming) kneading. In the above molding method; casting molding processing is the most widely used; accounting for 80% of the total production About some small general-purpose products can be directly cast from rods (tubes). Since the 1980s; some small and medium-sized companies in China have used cold-rolling expansion and cold (tempering) kneading in the production of small and medium-sized ferrules. to make Process.
1. Casting and molding can eliminate the defects of metal connotation; improve the metal arrangement; make the metal streamline disperse reasonably; the metal tightness is good. The casting molding process is widely used in bearing forming processing; it can complete small products from inner diameter ~20mm Processing of extra large products with an outer diameter of 5000mm. Common casting methods include: hot forging, cold forging, and warm forging;
Hot forging processing is divided into: free casting process, press casting process, flat forging machine casting process and high speed upsetting machine casting process.
Second, the cold heading forming cold rolling expansion process is a kind of advanced technology that can improve the data utilization rate; improve the metal arrangement fineness; adhere to the metal flow linearity; it is a chipless processing method. Theoretically; cold heading molding The product can be directly subjected to heat treatment and grinding without turning. At present, the cold rolling process is mainly applied to medium and small deep groove ball bearings; its primary process is:
Casting blank (ring)-turning (except channel)-è¾— expansion (ditch and chamfering) full diameter-softening mill end face adopts cold rolling process and casting forming process; the accuracy of product is affected by equipment precision; Affected by the accuracy of the forming mold.
Third, turning molding in the bearing profession; the traditional turning forming skills are the use of special lathes; the use of the gathering process to complete the forming process. However, due to the difficulty of equipment adjustment, low precision machine tools, low data utilization; Being screened.
With the development of scientific skills; CNC turning machine tools are rapidly developing and increasingly perfect. Currently; some products with cluttered shapes and high precision requirements are increasingly using CNC turning forming skills.

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