What Are The Classifications Of Cold Rolling Mills?

Cold rolling mills, as important equipment in the field of metal processing, can be classified into various types according to different classification criteria. The following are the main classification methods and characteristics of cold rolling mills:
I. Classification by the number of rolls
Two-roll cold rolling mill: It has the simplest structure, consisting of one working roll and one support roll. It is mainly used for rough rolling or billet opening of thicker strips. The equipment investment is low, but the rolling accuracy is relatively poor.
2. Four-roll cold rolling mill: Composed of two working rolls and two support rolls, the working rolls have a small diameter and can apply greater pressure. It is currently the most widely used cold rolling mill model and is suitable for high-precision rolling.
3. Six-roll cold rolling mill: Based on the four-roll model, an intermediate roll (such as HC and UC models) is added to further reduce the diameter of the working roll and enhance the plate shape control ability. It is suitable for rolling extremely thin strips and high-strength materials.
4. Multi-roll cold rolling mills (12 rolls, 20 rolls, etc.) : Such as the Sendzimir mill, the working roll diameter is extremely small, capable of rolling extremely thin stainless steel, silicon steel and other special materials. The structure is complex and the maintenance cost is high
Ii. Classification by the layout form of the rolling mill stand
Single-stand cold rolling mill: It has a low investment cost, is suitable for small-batch and multi-variety production, requires multiple reciprocating rolling, and has a relatively low production efficiency.
2. Multi-stand continuous rolling mill: 3 to 6 stands are arranged in series for continuous rolling, featuring high production efficiency and stable product quality. It is suitable for large-scale production, but requires a large investment.
3. Reversible cold rolling mill: The strip is reciprocally rolled between a single frame or two frames, featuring high flexibility and suitability for the production of medium and thick plates as well as special alloys.
Iii. Classification by Degree of Automation
1. Traditional cold rolling mill: Basic automatic control, relying on the experience of the operator.
2. Fully automatic cold rolling mill: Equipped with AGC(Automatic Thickness Control) and AFC(Automatic Plate Shape Control) systems, it adopts artificial intelligence and machine learning technologies to optimize the rolling process.