Bearing is an important component in contemporary mechanical equipment. Its main function is to support the mechanical rotating body, reduce the friction coefficient during its movement, and ensure its rotation accuracy. Rolling bearings generally consist of four parts: outer ring, inner ring, rolling elements and cage. According to the shape of the rolling elements, rolling bearings are divided into two categories: ball bearings and roller bearings. 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. Below, Yida Borun Petrochemical briefly introduces the processing technology of bearing components:

1. Bearing manufacturing process sequence (1) Bearing parts manufacturing-bearing parts inspection-bearing parts demagnetization, cleaning, rust prevention-bearing assembly-bearing finished product inspection-bearing finished product demagnetization, cleaning-bearing finished product oil packaging bucket finished product storage. (2) The ferrule is an important part of the rolling bearing. Due to the wide variety of rolling bearings, the size, structure, manufacturing equipment and process methods of the ferrules of different types of bearings are different. And because the ferrules have many processing steps, complex processes, and high processing accuracy requirements, the processing quality of the ferrules has an important impact on the accuracy, service life, and performance of the bearings.

2. Bearing ring process sequence The raw materials for ring manufacturing are cylindrical bars or pipes. Currently, rolling bearing rings generally have the following manufacturing processes based on different molding processes. (1) Bar stock: blanking-forging-annealing (or normalizing)-turning (cold press forming)-heat treatment quenching and tempering-grinding-parts inspection-demagnetization, cleaning-submit for assembly. (2) Bar and tube materials: blanking – cold rolling forming – heat treatment, quenching, tempering – grinding – parts inspection – demagnetization, cleaning – submission for assembly. (3) Pipe material: blanking – turning and forming – heat treatment, quenching and tempering – grinding – parts inspection – demagnetization, cleaning – submission for assembly (4) Bar stock: blanking – cold (warm) extrusion – turning – heat treatment, quenching, tempering – grinding – parts inspection – demagnetization, cleaning – submission for assembly

3. Ferrule forming method At present, the main forming methods in ferrule processing include the following: forging, turning, cold rolling and cold (warm) extrusion. (1) Forging Forming Through forging processing, the inherent defects of metal can be eliminated, the metal structure can be improved, the metal streamline distribution can be reasonable, and the metal tightness can be good. Forging forming processing technology is widely used in bearing forming processing. Common forging forming methods include: hot forging, cold forging, and warm forging. (2) The stamping forming process is an advanced process that can improve material utilization, improve the density of metal structures, and maintain metal streamlines. It is a chipless processing method. When using stamping process and forging molding process, the accuracy of the product is not only affected by the accuracy of the equipment, but also affected by the accuracy of the forming mold. (3) The traditional turning forming technology uses special lathes and uses a centralized process method to complete the forming process. Some products with complex shapes and high precision requirements are increasingly using CNC turning forming technology.

4. Selection of bearing processing oil In addition to using the hot forging process for bearing parts, suitable metal processing oil is usually selected according to different processes to improve workpiece accuracy and processing efficiency.

(1) Cold forging: Cold heading oil or strong shrinkage 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 to ensure the accuracy of the workpiece. (3) Turning: The accuracy of the turning process is mainly related to the feed speed and tool strength of the cutting process. The use of special lathe cutting oil can effectively reduce the cutting temperature and prevent the occurrence of thermal deformation.

We have rich experience in precision bearing manufacturing and are ranked NO.1 in China and NO.3 all over the world.

We can tailor the overall solution for the use of precision bearings.

HONB– Accountability & Innovation