Method for making rolling bearings DD ferrule forming method

Did you know how to make a rolling bearing?

Of course, there are many types of rolling bearings; their structural types, tolerances, materials selection, and processing methods are different; but the basic production process includes the following contents: bearing parts manufacturing - bearing parts reverse.岢辛慵舜 (3) 逑 7 7. 佬 D D bearing installation - bearing products review D bearing products demagnetization, removal - bearing products oil packaging drum products into the warehouse.

The ferrule is the primary part of the rolling bearing; due to the variety of rolling bearings; the ferrule scale, structure, equipment and process methods of the different types of bearings are different. Moreover, due to the many processing steps of the ferrule, the process is disorderly, and the processing precision is high; therefore, the processing quality of the ferrule has the primary influence on the accuracy, service life and function of the bearing.

The raw materials produced by the ferrule are cylindrical bars or tubes; at that time, according to the molding process, the rolling bearing ferrules generally have the following production processes.

1) (bar material) blanking-casting-annealing (or normalizing-turning (cold forming)-heat treatment quenching, tempering-grinding-parts reverse. 舜 ( (3) 逑矗峤蛔 2 2) (bar material) , pipe material) cutting - cold head forming - heat treatment quenching, tempering - grinding - parts reverse.舜 ( (3) 逑矗峤蛔 3 3) (pipe material) cutting - turning forming - heat treatment quenching, tempering - grinding - parts reverse.舜 ( (3) 逑矗峤蛔 4 4) (bar material) cutting - cold (warm) kneading - turning - heat treatment quenching, tempering - grinding - parts reverse. The twisting (3) 逑矗峤蛔 ferrule forming method was in the ferrule processing at that time; the forming methods were mainly the following: forging forming, turning forming, cold ramming and cold (warming) kneading. In the above molding method; forging forming processing is the most widely used; accounting for about 80% of the total output value; for some small general-purpose products, rod (tube) material can be directly used for turning. Since the 1980s, some small and medium-sized companies in China have selected cold-rolling and cold (warm) kneading processes in the production of small and medium-sized ferrules.

1) Forging forming type can eliminate the inherent defects of metal by casting processing; improve metal arrangement; make metal flow line distribution reasonable; metal density is good. The forging forming process is used throughout the bearing forming process; it can finish the processing from small products with an inner diameter of ~20mm to extra large products with an outer diameter of 5000mm. Commonly used forging forming methods are: hot forging, cold forging, and warm forging; China is mainly hot forging.

Hot forging processing is divided into: free casting processing technology, press casting process, flat forging machine casting process and high speed upsetting machine casting process due to the inconsistency of its molding processing equipment.

2) The cold heading forming cold rolling process is a kind of forward material application rate; the advancement metal arrangement fineness; the metal flow linear advancement elder process; it is a chipless processing method. In theory, cold-formed products can be directly subjected to heat treatment and grinding without turning. At that time; the cold rolling process was mainly applied to medium and small deep groove ball bearings; its primary process: casting blank (ring) - turning (except channel) - è¾— expansion (ditch and chamfer) full diameter - soft grinding two faces When the cold rolling process and the forging forming process are selected; the accuracy of the product is affected by the accuracy of the equipment; it is also affected by the precision of the forming die.

3) Turning is formed in the bearing profession; the traditional turning forming technology uses a special lathe; the forming process is completed by the collecting process. However, due to the difficulty in adjusting the equipment used in this method, the accuracy of the machine tool, and the low material application rate, the process is being reduced.

Following the development of science and technology; CNC turning machines are sensitive and expanding. At that time, some products with cluttered shapes and high precision requirements were increasingly using CNC turning technology.

In summary, the tendency of the ferrule forming process is to develop toward a metal material with a high application rate, high production efficiency, and high molding precision. Therefore, high-speed upset forging technology, cold rolling technology, and CNC turning technology will be used more and more.

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