The automation control system is of great significance and efficient to control the thickness precision in hot strip rolling process. In this paper, the relationship among thickness, rolling force and roll gap in hot strip rolling process was studied. The reason for the bad hit rate of thickness for the first format-changed blank was analyzed. The adjustment of thickness in the hot rolling process was also studied. The decrease of rolling force and the increase of roll gap can increase the exit thickness of the hot-rolled strip. As the thickness control system and mechanism for hot rolling process are complicated, there are much work need to be done.
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