PLATE THICKNESS CONTROLLING METHOD BY GAUGEMETER AGC

PURPOSE:To prevent occurrence of plate thickness deviation by grasping the gain in a gaugemeter AGC correctly in rolling a steel plate by a rolling mill and thereby controlling longitudinal thickness of the rolled steel plate properly. CONSTITUTION:In rolling a steel plate etc. by a rolling mill provided with work rolls 1, 2 and back up rolls 3, 4 fixed position rolling is made by rolling pressure with a kiss roll in a state of idling and variation of rolling force is determined Eccentricity of rolls is determined from the variation of rolling force. The amount of roll gap correction when gaugemeter AGC is made by set gain with the kiss roll idling is measured and the gain is obtained from the measured value and the amount of roll eccentricity. Theoretical plate thickness control in longitudinal direction of the rolled steel plate is made by adjusting and correcting value.