Analysis of tracking problems, camber and wedge in hot strip rolling^*

Analyse des problèmes de cheminement, de cambrage et de coin au train à chaud

Abstract

In this work, finite element simulations have been performed to model camber and lateral movement during hot rolling. To verify the results, experiments were made in MEFOS’s pilot plant mill. The FE-model used to determine strip camber and strip walk was developed using the explicit code DYNA3D. The roll in the FE-model was modelled partly stiff, to avoid generating an excessively large model. Roll deflection and roll flattening was calculated with MEFOS’s profile and flatness program CROWN426. A fairly good agreement between the FE-simulations and the experiments was achieved. Tracking problems in Avesta Sheffield’s Steckel mill have been analysed by evaluating process data statistically. The results show that low temperatures and high rolling forces contribute to tracking problems.