What are rollers? What does it do? What are the classifications of rolls?

Roll is to make the metal in the mill to produce continuous plastic deformation of the main workpiece and tools. Rolls are mainly composed of three parts: roll body, roll neck and roll head. Rolls are the intermediate parts of the rolls that are actually involved in rolling the metal. There are smooth cylindrical surfaces or curved surfaces with rolling grooves. The neck of the roll is mounted on a bearing which transmits the rolling force to the frame by means of a bearing housing and a depressor. The drive end is connected to the gear housing through a connecting shaft, which transmits the rotating torque of the motor to the rollers. The number of rollers on the mill stand may be two, three, four or more.

There are various ways to classify the rolls, mainly: (1) according to the product type of strip rolls, section rolls, wire rod rolls, etc.; (2) according to the position of the rolls in the mill series of billet rolls, roughing rolls, finishing rolls, etc.; (3) according to the function of the product is divided into a scale-breaking rolls, perforating rolls, flattening rolls, etc.; (4) according to the material of the product is divided into a hot rolls, cold rolls and so on.
Different classifications can be combined accordingly to make the meaning of the roll more clear, such as centrifugal casting of high chromium cast iron work rolls for hot strip rolling.

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