Rolling bearing ring forming process
Welding Machine,Automatic Welding Machine,Arc Welding Machine,Arc Welding Equipment Zhejiang Philic Fluid Control Co.,LTD , https://www.philicflow.com
Although there are many types of rolling bearings, their structural types, tolerance grades, material selection, and processing methods are different, but the basic manufacturing process includes the following contents:
1, bearing parts manufacturing - bearing parts inspection - bearing parts demagnetization, cleaning, rust - bearing assembly - bearing finished product inspection - bearing finished product demagnetization, cleaning - bearing finished oil coating package finished goods into the warehouse.
2. The ferrule is an important part of the rolling bearing. Due to the wide variety of rolling bearings, the ferrule size, structure, equipment used and manufacturing methods of different types of bearings are different. Moreover, due to the many processing steps of the ferrule, complicated process and high processing precision, the processing quality of the ferrule has an important influence on the accuracy, service life and performance of the bearing.
3. The raw materials for the manufacture of the ferrule are cylindrical bars or tubes. At present, depending on the molding process, the rolling bearing ferrules generally have the following manufacturing processes.
1) (bar material) blanking - forging - annealing (or normalizing - turning (cold forming) - heat treatment quenching, tempering - grinding - parts inspection - demagnetization, cleaning - submission assembly.
2) (bar, tube) cutting - cold head forming - heat treatment quenching, tempering - grinding - parts inspection - demagnetization, cleaning - submission assembly.
3) (pipe material) blanking - turning forming - heat treatment quenching, tempering - grinding - parts inspection - demagnetization, cleaning - submission assembly 4) (bar) cutting - cold (warm) extrusion - turning - heat treatment Quenching, tempering-grinding-part inspection-demagnetization, cleaning-submission assembly ring forming method:
At present, in the ferrule processing, there are mainly the following molding methods: forging type, turning forming, cold boring expansion molding and cold (warming) extrusion molding. In the above molding method, forging type processing is the most widely used, accounting for about 80% of the total production volume. For some small general-purpose products, rod (tube) material can be directly turned and formed. Since the 1980s, some small and medium-sized enterprises in China have adopted cold rolling and cold (warm) extrusion molding processes in the production of small and medium ferrules.
1) Forging type can eliminate metal internal defects by forging processing, improve metal structure, make metal flow line distribution reasonable, and metal tightness. The forging type processing technology is widely used in bearing forming processing, and can process from small products with an inner diameter of ~20mm to extra large products with an outer diameter of 5000mm. Common forging methods are: hot forging, cold forging, warm forging, and hot forging in China.
Hot forging processing is divided into: free forging processing technology, press forging process, flat forging machine forging process and high speed upsetting machine forging process due to different molding processing equipment.
2) The cold heading cold rolling process is an advanced process method that can improve the material utilization rate, improve the compactness of the metal structure, and maintain the linearity of the metal flow. It is a chipless processing method. In theory, cold-formed products can be directly heat treated and ground without turning. At present, the cold rolling process is mainly applied to medium and small deep groove ball bearings. The main process is:
Forged blank (ring) - turning (except channel) - è¾— expansion (ditch and chamfer) full diameter - soft grinding both ends.
When using the cold boring process and the forging process, the accuracy of the product is affected by the accuracy of the machine, and also by the precision of the forming die.
3) Turning molding:
In the bearing industry, the traditional turning technology uses a special lathe to complete the forming process using a centralized process. However, due to the difficulty in adjusting the equipment used in this method, the low precision of the machine tool and the low material utilization rate, the process is being eliminated.
With the development of science and technology, CNC turning machine tools have developed rapidly and become more and more perfect. At present, some products with complex shapes and high precision requirements are increasingly using CNC turning technology.
In summary, the direction of the ferrule forming process should be toward the direction of high utilization of metal materials, high production efficiency, and high molding precision. Therefore, high-speed upsetting technology, cold rolling technology, CNC turning forming technology will be more and more applications.