Application and characteristic analysis of multi-roller cold rolling mill bearings in the metal processing industry

Dec 25, 2023

1. Introduction

The multi-roll cold rolling mill is an indispensable piece of equipment in modern metal processing. It is mainly used to pass metal sheets through a series of rolling processes to achieve the required thickness, flatness and mechanical properties. During the operation of the multi-roll cold rolling mill, bearings, as one of its core components, play important functions of support and rotation. This article will detail the structural characteristics, working principles, application fields and other aspects of multi-roller cold rolling mill bearings.

2. Structural characteristics of multi-roller cold rolling mill bearings

Multi-roll cold rolling mill bearings usually use rolling bearings, which mainly include four parts: inner ring, outer ring, rolling elements and cage. The inner ring matches the journal, the outer ring matches the bearing seat, the rolling elements between the inner and outer rings, and the cage evenly distributes the rolling elements to prevent them from colliding. This structure enables the bearing to withstand large radial and axial loads with rigidity and rotational accuracy.

3. Working principle of multi-roller cold rolling mill bearings

During the working process of the multi-roll cold rolling mill, the bearings are subjected to complex loads, including rolling force, bending moment, torque, etc. The inner ring of the bearing rotates with the journal, and the outer ring is fixed in the bearing seat. The rolling elements roll between the inner and outer rings to achieve low friction and high-efficiency journal rotation. The cage ensures the stability and uniform distribution of the rolling elements during the rolling process and avoids mutual interference and collision between the rolling elements.

4. Application fields of multi-roller cold rolling mill bearings

Multi-roller cold rolling mill bearings are widely used in production lines in steel, nonferrous metals, papermaking, plastics and other industries. In the steel industry, multi-roll cold rolling mill bearings are used to roll steel plates, steel strips and other products to ensure uniform thickness and smooth surfaces; in the nonferrous metal industry, bearings are used to roll aluminum plates, copper plates, etc.; in the paper and plastic industries, bearings are used in calendars, calendaring machines and other equipment to ensure the flatness and smoothness of products.

The picture above is a double-row cylindrical roller bearing produced by FV for cold rolling mills.

5. Selection and maintenance of multi-roller cold rolling mill bearings

(1) Selection principles

When selecting bearings for multi-roll cold rolling mills, the following factors need to be considered:

Load size and nature: According to the working conditions of the rolling mill, select the bearing type and specifications that can withstand the corresponding load.

Speed: According to the speed requirements of the rolling mill, select the appropriate bearing type and internal structure.

Accuracy: Selecting the right bearings can make all the difference in achieving your product's desired level of accuracy. Don't settle for less than the best - choose bearings designed to meet your precision requirements.

Working environment: Consider temperature, humidity, corrosiveness and other factors to select suitable bearing materials and surface treatments.

(2) Maintenance and maintenance

Regular maintenance is crucial for keeping your multi-roller cold rolling mill bearings functioning at their best and ensuring they last as long as possible. By taking proactive steps to care for your equipment, you can prevent costly breakdowns and extend the lifespan of your bearings. Don't wait until it's too late - prioritize maintenance today to keep your operations running smoothly:

Cleaning: Regularly remove dirt and impurities from the bearing surface to keep it clean.

Lubrication: According to the working conditions and requirements of the bearing, select the appropriate lubricant and lubricate it regularly.

Inspection: Regularly check the bearing wear, clearance changes, etc., and find and deal with problems in time.

Replacement: Promptly replace severely worn or damaged bearings to avoid disrupting rolling mill operations.

The picture above is the double-row tapered roller bearing 323128 designed and manufactured by FV.

6. Conclusion

Multi-roller cold rolling mill bearings are important components in the metal processing industry, and their performance and quality are directly related to product quality and production efficiency. We can better understand and evaluate their important position and role in the metal processing industry through in-depth understanding and analysis of multi-roller cold rolling mill bearings' structural characteristics, working principles, application fields, etc. At the same time, correct selection and maintenance are significant to ensure the stable operation of multi-roller cold-rolling mills and improve production efficiency. In future development, with the continuous emergence and application of new materials and new processes, the performance of multi-roller cold rolling mill bearings will continue to improve, providing strong support for the development of the metal processing industry.