Introduction to the production process of small four-row tapered roller bearings.

Oct 11, 2024

As an important mechanical component, the production process of small four-row tapered roller bearings is complex and delicate, covering multiple links such as material selection, processing and manufacturing, heat treatment, assembly and quality inspection. The following is a detailed introduction to the production process of small four-row tapered roller bearings.

1. Material selection

The manufacture of small four-row tapered roller bearings first requires the selection of high-quality materials. Generally speaking, alloy steels such as GCr15 steel are widely used in the production of such bearings due to their good mechanical properties and wear resistance. The selection of materials must fully consider factors such as the bearing's stress conditions, use environment and service life to ensure the reliability and durability of the final product.

2. Blank forging

Blank forging is one of the key links in bearing production. It mainly includes steps such as heating, cutting and forging. The main purpose of blank forging is to obtain a blank similar to the product shape, improve the utilization rate of metal materials, eliminate internal defects in the metal, improve the metal structure, and make the metal streamline distribution reasonable, thereby increasing the service life of the bearing. According to the temperature of the metal during forging, forging can be divided into three categories: hot forging, cold forging and warm forging. At present, hot forging is widely used.

During the hot forging process, the metal is heated to above the recrystallization temperature and deformed by hammer forging, flat forging, machine forging or press forging to obtain the required blank shape. After forging, it is also necessary to expand the forging by a hole expander to improve the dimensional accuracy and geometric accuracy of the forging and create conditions for the automation of subsequent processes.

3. Processing and manufacturing

The processing and manufacturing link is the core part of bearing production, mainly including turning, gear hobbing, finishing and other processes. At this stage, high-precision machine tools and tools are required to ensure the accuracy and quality of the bearing.

Turning: The blank is preliminarily processed by a lathe to form the basic outline of the bearing.

Gear hobbing: The inner and outer raceways of the bearing are processed by a gear hobbing machine to form a precise raceway shape.

Finishing: Further fine processing of the bearing, such as grinding, is performed to improve the surface finish and dimensional accuracy of the bearing.

4. Heat treatment

Heat treatment is a very important step in the manufacturing process of tapered bearings. Common heat treatment methods include quenching, tempering, carburizing, etc. These processes can significantly improve the hardness, strength and toughness of steel, thereby improving the service life and performance of bearings.

Quenching: The bearing is heated to a certain temperature and then cooled rapidly to obtain high hardness and high strength.

Tempering: The quenched bearing needs to be tempered to eliminate internal stress and improve toughness and stability.

Carburizing: For bearings that need to improve the surface hardness further, carburizing can be performed to form a high-hardness carbide layer on the surface.

5. Assembly and inspection

Assembly is the last step in the manufacture of tapered bearings. During the assembly process, high-precision instruments such as measuring instruments are required to ensure the installation accuracy of the bearings. At the same time, the bearings need to be cleaned and oiled to remove dirt and ensure lubrication.

After assembly, the bearings must also be strictly inspected for quality. It includes appearance inspection, dimension measurement, performance testing and other aspects to ensure that the bearings meet design requirements and quality standards.

The production process of small four-row tapered roller bearings is complex and delicate, involving multiple links such as material selection, blank forging, processing and manufacturing, heat treatment, assembly and quality inspection. Only through scientific and reasonable manufacturing processes and strict quality control can high-quality bearing products be produced. With the continuous advancement of science and technology and the continuous optimization of processes, the production process of small four-row tapered roller bearings will also be continuously improved and upgraded to meet the needs of higher performance and wider applications.