Roll wear prediction model for finishing stands of hot strip mill

Abstract

Roll wear in a hot strip mill (HSM) is a detrimental process, which progressively worsens the rolls. This necessitates replacement of the rolls after rolling a number of strips. Roll wear adversely affects the strip shape and the performance of a mill. It is important, therefore, to quantify roll wear during the rolling process. The present paper proposes a wear model for prediction of the wear profile of the rolls at the finishing stands of a hot strip mill. Initially, a roll force model was developed to calculate the roll force at each stand by considering various factors such as the strip thickness and width, mean flow stress (MFS), and roll diameter for each pass. The roll force calculated by the model was subsequently integrated with the roll wear model for calculation of the wear along the roll barrel. The effects of the continuous variable crown (CVC) profile of the roll and roll shift were also included in the wear calculation. The wear profile predicted by this model was validated experimentally in the plant. Predicted values match closely with those obtained from experiment. The model has the potential to be used as an efficient online method to predict the wear profile within a reasonable computational time.

Ensemble Learning Based Methods for Crown Prediction of Hot-Rolled Strip

“…Difference Method, 10,11) the calculation of roll wear based on discretization or statistical regression methods. 12) Since the results of the pre-setting model sometimes have large deviations, the control models in L1 are essential for obtaining the required strip crown. 13) According to the difference between the measured crown and the target crown, the crown feedback control eliminates the crown deviations by adjusting the bending force in the upstream stands.…”

Analysis of Spalling in Roughing Mill Backup Rolls of Wide and Thin Strip Hot Rolling Process

“…Roll wear in hot rolling mill is a detrimental process, which progressively worsens the rolls . Li et al investigated into thermal wear of high speed steel rolls in HSM.…”

ASR Bending Force Mathematical Model for the Same Width Strip Rolling Campaigns in Hot Rolling

“…For this model, the wear and thermal contour of work rolls was calculated . John et al proposed a wear model for the prediction of wear profile of the rolls at the finishing stands of HSM. For calculating the temperature field and thermal contour, Zhao et al built a theoretic mathematical model by two‐dimensional finite difference method.…”