PREDICTION OF WORK ROLL INITIAL CROWN ACCORDING TO DESIRED STRIP PROFILE IN HOT ROLLING

The final hot strip profile is a superposition of the roll initial crown, the roll bending and flattening crown, the roll wearing crown and the roll thermal crown. In this research, linear regressionmodels are proposed to predict the roll force, the roll wearing crown and the roll thermal crown usingexperimental data provided by Mobarake Steel Complex (MSC). The Euler-Bernoulli beam theorybased on elasticity approach is also used to predict the roll bending and flattening crown. Finally, thework roll initial crown in order to obtain desired strip profile in hot rolling is predicted utilizing acomputer programming. The obtained initial crowns are then used for seven stands of an actual roll schedule for hot strip mill of MSC. The measured strip profile shows a good agreement with the desired one for the mentioned mill.

Keywords:

Hot rolling , Initial crown , Wearing crown , Thermal crown , Bending crown , Empirical data , Regression