Introduction of Rolling Mill Categories

Introduction to the Performance of Common Rolling Mill Categories

At present, there are many types of rolling mills in the market, which can be divided according to the arrangement and number of rolls. One kind of two-roll mill is simple in structure and widely used. It can be further divided into reversible and irreversible.

Comparatively speaking, the working roll diameter of the four-bar mill is smaller, the rolling moment is transferred, and the rolling pressure is borne by the backup roll with a larger diameter. The main advantages of this kind of equipment are large relative stiffness, large reduction, small rolling ductility, and the ability to roll thinner plates, including reversible and continuous rolling.

The five-roll mill consists of two structural forms, one is a contact-bending-straightening mill. In fact, the equipment belongs to a four-high mill with small diameter idle rolls that bend the rolled parts, and its reduction is many times larger than that of ordinary mills. Plastic bending deformation occurs around the small idle roll, which can roll Hard-Deformed metal and alloy strips.

Another kind of equipment is often used to roll stainless steel, carbon steel and non-ferrous metal strips with very small thickness tolerance. The position of the middle roll can be adjusted along the inlet or outlet direction of the mill to maintain the correct thickness of the rolled piece.

Comparatively speaking, HC type is a rolling mill with excellent performance, which can control roll crown. It can also be regarded as a device for adding a pair of axially movable intermediate rolls between the working roll and the backup roll of a four-high mill. The equipment is generally used for cold-rolled broadband steel.

In addition, there is also popular equipment, called partial eight-high mill, which has a working roll diameter of 1/6 of the backup roll and makes a relative deviation to prevent the horizontal bending of the working roll. The working rolls of the mill have good stability and high horizontal stiffness and are used for cold rolling of refractory steel, silicon steel, and non-ferrous metal strips.