High Precision HI Reversing Cold Rolling Mill - China Suppliers & Factory for Carbon and Stainless Steel

The Theory of Four Roll Rolling Mill

Four roll rolling mill system is composed of two pcs of support rolls and two pcs working rolls. During mill, through pressing cylinder or mechanical pressing device, the pressing force will transmit to support roll bearing stand, support roll, working roll, and finally act on rolled piece. The work piece height will be reduced (become thinner), length extended (become longer), then to meet the expected specifications.

Due to the impact of pressing force, rollers will become bending, the workpiece edges will become thinner, rollers need grinding its convexity according to practical situation.

⚙️ Key Principle: The four-roll configuration uses backup rolls to minimize working roll deflection, ensuring uniform thickness and superior flatness across the full strip width.

Product Introduction

From a technical perspective, the four-high reversing cold rolling mill consists of work rolls and backup rolls. The work rolls directly contact the rolled piece to perform rolling deformation, while the backup rolls support the work rolls to reduce their deflection and ensure the stability and accuracy of the rolling process. The reversible design enables the rolling mill to roll in both forward and reverse directions without frequent adjustments to the position of the rolled piece or the rolling mill, significantly improving production efficiency.

In terms of application scenarios, the four-high reversible cold rolling mill is mainly used for rolling various metal strips and plates, such as stainless steel, carbon steel, alloy steel, copper, and aluminum. It can meet the strict requirements of different industries for material thickness, width, surface quality, and mechanical properties. For example, in the automotive manufacturing industry, the plates rolled by the four-high reversible cold rolling mill are used for body panels and require high strength, good formability, and corrosion resistance; in the electronic and electrical industry, the strips rolled are used to manufacture various precision components and require high surface finish and dimensional accuracy.

In terms of industry standards, the design, manufacture, and acceptance of four-high reversing cold rolling mills follow strict standards and regulations. These standards cover multiple aspects such as the structure, performance, safety, and environmental protection of the rolling mill, ensuring its stable and reliable operation during operation and the safety of operators. For instance, parameters such as the rolling force, rolling speed, and roll diameter of the rolling mill are clearly specified to ensure the stability of the rolling process and the consistency of rolling quality.

In addition, the operation and maintenance of the four-high reversible cold rolling mill are also very important. Operators need to undergo professional training, be familiar with the structure, performance, and operating procedures of the rolling mill, and be able to correctly adjust the parameters of the rolling mill and handle various problems that occur during the rolling process. At the same time, regular maintenance and servicing are also key to ensuring the long-term stable operation of the rolling mill. This includes aspects such as roll replacement, lubrication system inspection, and electrical system maintenance.

Technical Parameter Table