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Method for making rolling bearings DD ferrule forming method
Source: Bearing network time: 2013-10-13
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Of course, there are many types of rolling bearings; their structural types, tolerances, materials selection, and processing methods are different; however, the basic production process includes the following contents:
Bearing parts production - bearing parts anti-岢 慵舜 慵舜 screw (3) 逑 7 7. 佬 D D bearing installation - bearing products review D bearing products demagnetization, removal - bearing products oil packaging packaging 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. Due to the ferrule processing process, process clutter, processing accuracy High demand; therefore; the processing quality of the ferrule has a primary impact on the accuracy, service life and utility 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) blanking - cold head forming - heat treatment quenching, tempering - grinding - parts reverse. 舜 screw (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) blanking - cold (warm) kneading - turning - heat treatment quenching, tempering - grinding - parts counter. 舜 screw (3) The 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, it is possible to use rod (tube) material for direct turning. Since the 1980s, some small and medium-sized companies in China have small and medium-sized sets. The production of the ring uses cold rolling and cold (warm) kneading process.
1) Forging forming type can eliminate the inherent defects of metal by casting processing; improve metal arrangement; make metal flow line distribution reasonable; metal strict density. Forging forming processing technology is used in bearing forming processing; can complete from inner diameter ~ 20mm Small products to the processing of extra large products with an outer diameter of 5000mm. Commonly seen forging forming methods are: hot forging, cold forging, 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 process is a kind of material that can advance the material application rate; the metal arrangement is advanced; the metal stream is linear and the advanced elder process; it is a chipless processing method. Theoretically; The 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; the primary process is:
Casting blank (ring)-turning (except channel)-è¾— expansion (ditch and chamfering) full diameter-soft grinding two-face selection of cold rolling process and forging forming process; the accuracy of the product is affected by the accuracy of the equipment; To be affected by the accuracy of the molding die.
3) Turning is formed in the bearing profession; the traditional turning forming technology uses a special lathe; the assembly process is completed by the assembly process. However, the equipment used in this method is difficult to adjust, the machine tool has low precision, and the material application rate is low; therefore, the process method Being cut.
With the development of science and technology; CNC turning machine tools are sensitively developed and increasingly perfect. At that time; some products with cluttered shapes and high precision requirements are increasingly using CNC turning technology.
In summary, the tendency of the ferrule forming process should be toward the tendency of high application rate of metal materials, high production efficiency, and high molding precision. Therefore, high-speed upsetting technology, cold rolling technology, and numerical control turning forming technology will be obtained. More and more applications.
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