1.Overview of cold rolling

Purpose of cold rolling: 1) thin rolling 2) flatness change.

Cold rolled material: 1) strip 2) sheet

Components: uncoiler, rolling mill, rolling mill drive, tension recoiler, belt coiler, belt coiler lifter, coil tray system, intermediate system

The main system is: uncoiler, rolling mill, tension recoiler

2.Control of cold rolling

Cold rolling control mainly includes three parts: thickness control, flatness control, speed control

2.1 Thickness control

Mainly adopt roll distance control, automatic roll distance control, automatic torque control.

The rolling mill is the main equipment for cold rolling material thickness control. The commonly used rolling mill is divided into:

  4-high rolling mill

  6-high rolling mill

  20-high rolling mill

The distance between the lower and upper rollers is detected by the position detection system, and the distance between the upper and lower rollers is adjusted by the hydraulic system.Achieve the purpose of adjusting thickness.

2.2 Flatness control

Flatness control is the main purpose of cold rolling, in order to achieve the desired flatness.Surface inspection system, continuous variable convexity (CVC) and displacement control are required.

2.3 Speed control

Cold rolling material hardness, in order to maintain good mechanical properties of the material, it is necessary to ensure that the cold rolling process to reduce the impact of tensile force on the material, and to ensure a certain tension, to ensure that the crimp process to achieve good characteristics.So speed control is very important.