An integrated thermal model of hot rolling
During the heavy plate rolling process, different production steps, i.e., roll passes, descaling passes, and air cooling periods, influence the temperature evolution of the plate. All these relevant aspects are covered by a one-dimensional thermal model proposed in this paper. Experiments were conducted in a rolling mill under realistic rolling conditions to parametrise and validate the model. Using pyrometer measurements, a simple model adaption strategy is developed, which can cope with uncertainties in the initial temperature profile. The model provides accurate predictions of the temperature evolution of the plate during the whole rolling process from the plate's exit of the furnace to the last pass. Thus, it can be used for scheduling the production process. Based on the model, an observer can be designed.
heavy plate rolling descaling air cooling temperature evolution heat transfer