STRIP SHAPE CONTROL

On-line measurement

With a suitable servohydraulic mill screwdown system that may be retrofit into installed into older mills and usually exists on new mills, a strip thickness control will achieve the required results.

The effectiveness of the strip shape control depends largely on the type of control components that are installed in the mill. The basic control components are: Roll tilting, roll bending, intermediate roll shifting and zone cooling.

Roll tilting is available in all but certain cluster mills. Not all mills have roll bending units (positive and negative). The intermediate roll shifting is only available on 6 high mills and certain special cluster mills. An efficient zone cooling can be added to many 4 high and 6 high mills.

The strip shape control can only use the control components that are installed by the mill, so that the success of the strip shape control depends on the configuration of the mill. Vollmer shape controls use all existing control components.

Strip shape measurement with or without control
Even with a limited availability of control components, meaning a limited control potential, the shape measurement has great advantages for the user. Knowing the current strip condition enables the adaptation of the rolling conditions to the shape situation. In the case of poor strip shape, strip breaks can effectively be prevented. In case of strip with a uniform tension distribution, the mill can be operated with high efficiency. Strip shape measurement has always resulted in a productivity increase.