Two-roll mill

This rolling mill features a simple structure, reliable operation, and is powered by a DC motor. It serves as a two-high reversing mill for initial rolling, converting ingots into various rectangular billets. The two-high reversing mill is also suitable for rolling rail beams and medium-thick plates. A group of two-high stands driven by either DC or AC motors forms a continuous rolling mill, capable of producing billets and profile steel with high productivity. It is also used in tandem rolling of thin plates, cold rolling of strip steel, and cold rolling leveling processes.

Four-roll mill

The machine consists of two larger support rolls and two smaller working rolls. The smaller working rolls reduce the contact area and decrease the rolling force. The support rolls serve to support the working rolls, reducing their bending and enhancing the rigidity of the mill. To ensure stability of the working rolls, they are often slightly offset in the rolling direction to prevent the centerline of the rolls from crossing due to bearing clearance. Four-roll mills are commonly used for strip rolling.

The two-roll cold rolling mill, due to its larger roll diameter and increased contact area with the workpiece, exerts a higher rolling force. As a result, it has specific requirements for material thickness to avoid issues during the rolling process. In contrast, the four-roll cold rolling mill, with an increased roll system, allows for smaller work roll diameters. Consequently, the rolling force is reduced, enabling it to process thinner materials and offering a wider range of rolling thicknesses.