Sixth order actuator and mill set-up system for rolling mill profile and flatness control

摘要

A rolling mill stand (2) having a pair of side shiftable rolls (6) defining a roll gap profile therebetween varying along the length of the rolls according to a sixth order polynomial equation. The flatness of the strip exiting the rolling mill stand is controlled by determining the temperature profile of the rolls and adjusting the side shift positions of the rolls to compensate for the expansion of the rolls due to changes in the temperature of the rolls.