Patent ID: 6408222
Filing Date: 2002-06-18
Classification: B22D

Abstract:
A method of controlling thickness of a strip in a twin roll strip casting device having a fixed roll and a horizontally movable roll, said method comprising the steps of:measuring a movement value Gj(&thgr;) of journals of said fixed and horizontally movable rolls and a movement value Gg(&thgr;+&pgr;) of barrels of said rolls; predicting a movement value Mfcr(&thgr;) of a roll nip of said fixed roll and a movement value Mmcr(&thgr;) of a roll nip of said horizontally movable roll in the basis of said movement values Gj(&thgr;) and Gg(&thgr;+&pgr;); calculating a difference value between said movement values Mfcr(&thgr;) and Mmcr(&thgr;) to obtain an amount of variation Mdiff(&thgr;) of a gap between the roll nip of said fixed and horizontally movable rolls; and controlling thickness of a strip by minimizing the amount of variation Mdiff(&thgr;)of the gap between the roll nip.