Introduction of bearing ring processing technology

Although there are many types of rolling bearings, their structural types, tolerance levels, material selection, and processing methods are different, but their basic manufacturing processes are similar. The following briefly introduces the processing technology of bearing parts:

Bearing manufacturing generally goes through the following processes:

1 Bearing parts manufacturing

2 Inspection of bearing parts

3 Demagnetization, cleaning and rust prevention of bearing parts

4 Bearing assembly

5 Inspection of finished bearing

6 Demagnetization and cleaning of bearing products

7 Storage of finished bearing products with oil-coated packaging hopper

Process sequence of bearing ring:

Rings are important parts of rolling bearings. Due to the wide variety of rolling bearings, the size, structure, manufacturing equipment and process methods of different types of bearings are different. In addition, because of the many processing procedures of the ferrule, the complexity of the process and the high machining accuracy requirements, the processing quality of the ferrule has an important impact on the accuracy, service life and performance of the bearing.

The raw materials for manufacturing ferrules are cylindrical rod or tube materials. Currently, rolling bearing ferrules generally have the following manufacturing processes according to different molding processes.

(1) Bar stock: blanking-forging-annealing (or normalizing)-turning (cold forming)-heat treatment quenching, tempering-grinding-parts inspection-demagnetization, cleaning-submission for assembly.

(2) Bar and tube materials: blanking-cold rolling forming-heat treatment quenching, tempering-grinding-part inspection-demagnetization, cleaning-submitting for assembly.

(3) Tube material: blanking-turning forming-heat treatment quenching and tempering-grinding-parts inspection-demagnetization, cleaning-submission for assembly

(4) Bar stock: blanking-cold (warm) extrusion molding-turning-heat treatment quenching and tempering-grinding-part inspection-demagnetization, cleaning-submission for assembly

Ring forming method

At present, the main forming methods in ferrule processing are as follows: forging forming, turning forming, cold rolling and expanding forming and cold (warm) extrusion forming.

(1) Forging forming can eliminate the inherent defects of metal through forging processing, improve the metal structure, make the metal streamline distribution reasonable, and the metal tightness is good. The forging forming process is widely used in the forming of bearings. The common forging forming methods include hot forging, cold forging, and warm forging.

(2) The stamping process is an advanced process method that can increase the utilization rate of materials, improve the compactness of the metal structure, and maintain the linearity of the metal flow. It is a chipless processing method. When the stamping process and the forging forming process are used, the accuracy of the product is not only affected by the accuracy of the equipment, but also by the accuracy of the forming die.

(3) The traditional turning forming technology is to use a special lathe to complete the forming process using a concentrated process method. Some products with complex shapes and high precision requirements are increasingly using CNC turning forming technology.

Selection of bearing processing oil

In addition to the use of hot forging process for bearing accessories, suitable metal processing oils are usually selected according to the process to improve the accuracy and processing efficiency of the workpiece.

(1) Cold forging: cold forging oil or strong shrinking oil is often used to improve the accuracy of the workpiece.

(2) Stamping: Since the stamping process is limited by the accuracy of the mold, special stamping oil is used to extend the service life of the mold and ensure the accuracy of the workpiece.

(3) Turning: The precision of the turning process is mainly related to the feed speed of the cutting process and the strength of the tool. The use of special lathe cutting oil can effectively reduce the cutting temperature and prevent the occurrence of thermal deformation.

The above is a brief introduction to the processing technology of bearing rings. Bearing processing is developing in the direction of high utilization rate of metal materials, high production efficiency and high forming accuracy.

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