Improving the Accuracy of Predicting Work Roll Wear in the Hot Strip Mill
(Room 102B)
09 May 17
2:00 PM
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2:30 PM
Tracks:
Rolling Process Modeling, Simulation & Control
Accurate prediction of work roll wear is a key component of high-quality hot strip rolling. Incorrectly calculated wear has different implications for the roughing and finishing stands. In roughing stands, the wear of the work rolls directly affects the transverse thickness distribution of the bar, or the bar crown. The presence of excessive crown due to roll wear can cause bar width contraction in a horizontal roughing pass or in the early finishing stands. In addition, severely worn work rolls on the last roughing stand can cause edge waves on the transfer bar. Incorrect calculations of roll wear in the finishing stands leads to erroneous shape setup. Comparative analysis of the measured and predicted roll wear in the roughing and finishing stands allowed for the identification of process variables that improve the accuracy of wear prediction.