| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a rolling method which prevents meandering by performing appropriate levelling control in a rolling process of a metal plate material by taking into consideration the shape of a metal-plate raw material and an offset amount of a work roll in the rolling direction. <P>SOLUTION: The levelling control of the metal plate material 2 in a rolling process such as cold reverse rolling is performed based on a meandering-correction levelling amount G which is calculated by adding a levelling amount G2 to a levelling amount G1. The levelling amount G2 is determined by the meandering amount Q2 caused by the offset of the work rolls 1a, 1b in the rolling direction, and the levelling amount G1 is determined by the meandering amount Q1 of rolling caused by the shape of the metal-plate raw material and by a rate of rolling reduction. The offset meandering amount Q2 causes imbalance on the work side (WS) and on the drive side (DS) under a large rolling draft. By performing the levelling control based on the meandering amount, which is calculated by adding the offset meandering amount Q2 to the meandering amount Q1 of rolling, meandering can be effectively prevented, which contributes to an improvement in rolling yields and rolling efficiency. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
