An apparatus and a method for controlling thickness of a strip in a twin roll strip casting device

摘要

A strip thickness control method in a twin roll strip casting device having a fixed roll and a horizontally movable roll, the method including the steps of: measuring a movement value Gj(theta) of journals of the fixed and movable rolls and a movement value Gg(theta+pi) of barrels of the rolls; predicting a movement value Mfcr(theta) of a roll nip of the fixed roll and a movement value Mmer(theta) of a roll nip of the movable roll from the movement values Gj(theta) and Gg(theta+pi); calculating a difference value between the movement values Mfcr(theta) and Mmcr(theta) to obtain an amount of variation Mdiff(theta) of a gap between the fixed and movable rolls; and controlling thickness of a strip to minimize the amount of variation Mdiff(theta) of the gap between the rolls.