Introduction to bearings used in rebar rolling mills

Mar 21, 2024

The rebar rolling mill is one of the most important pieces of equipment in the steel industry and is mainly used to produce rebar. Bearings, as important components of the rolling mill, play a key role in supporting and transmitting loads and ensuring the normal operation of the rolling mill. Therefore, selecting appropriate bearings is of great significance to ensure the operating efficiency and product quality of the rebar rolling mill.

1. Bearing types and characteristics

Rebar rolling mills usually use large, heavy-duty bearings to adapt to high-load, high-speed working environments. Four-row cylindrical roller bearings are always used in rolling mill roll diameters and drums due to their strong load-bearing capacity and smooth operation, which can withstand large radial loads and provide a strong guarantee for the rolling mill's stable operation.

Rolling mills also need to bear axial loads, so thrust roller or thrust ball bearings and angular contact ball bearings or radial roller bearings are widely used. These bearings can withstand axial loads, effectively preventing axial displacement during the rolling mill's operation and ensuring its stability and safety.

2. Lubrication and cooling

In order to ensure the normal operation of bearings, lubrication and cooling are particularly important. At present, most rolling mills use oil-gas lubrication or oil mist lubrication and grease for lubrication and cooling. Oil-gas lubrication can accurately deliver lubricating oil to the friction parts of the bearing, effectively reducing bearing wear and heat; oil mist lubrication reduces the friction coefficient between the bearing and the roller by forming an oil film, thereby increasing the service life of the bearing. At the same time, the lubricating oil circulation cooling system can also take away the heat generated by the bearing in time and maintain the normal operating temperature of the bearing.

3. Maintenance and management of bearings

The maintenance and management of bearings are also crucial to ensure the stable operation of rolling mills. Rolling mill oil film bearing technology is a system engineering technology that involves many aspects, such as operating technology, manufacturing technology, testing technology, theoretical research, and product development. In terms of operating technology, it is necessary to master a complete set of knowledge and skills such as storage, cleaning, installation, debugging, operation, maintenance, diagnosis, and management of bearings. Correct maintenance and management measures can promptly detect and solve problems that occur during bearing operation, extend the service life of bearings, and improve the operating efficiency of rolling mills.

In addition, bearings need to be inspected and tested regularly to ensure that their performance parameters meet the requirements. Bearings that are severely worn should be replaced in time to avoid rolling mill shutdown or damage due to bearing failure. At the same time, regular inspection and maintenance of the lubrication system is required to ensure that the cleanliness and supply of lubricating oil meet the requirements.

4. Bearing material selection and manufacturing

The material selection and manufacturing quality of bearings have a decisive influence on their performance and service life. In terms of material selection, it is necessary to choose materials with high strength, high wear resistance, and high heat resistance to adapt to the harsh working environment of the rolling mill. In terms of manufacturing, advanced processing techniques and equipment are required to ensure that the accuracy and surface quality of the bearings meet the requirements. At the same time, strict inspection and testing of bearings are also required to ensure that their performance is stable and reliable.

In short, the bearings used in rebar rolling mills play a vital role in the operation of the rolling mill. Selecting the appropriate bearing type, adopting reasonable lubrication and cooling methods, strengthening bearing maintenance and management, and improving bearing material selection and manufacturing quality are all key factors in ensuring the stable operation of the rolling mill and product quality. In the fast-developed species, with the advancement of science and technology and the fast-developed rolling mill technology, it is believed that more high-performance and high-reliability bearing products will be used in the field of rebar rolling mills, injecting new impetus into the development of the steel industry.