| 摘要 |
PROBLEM TO BE SOLVED: To surely perform flattening of steel while suppressing end waves, with respect to the steel after straightening.SOLUTION: When straightening the steel 3 by using a roller leveler 1, the steel is straightened after constructing a discriminant wherein rolling reduction IM for straightening, a sheet width W, the effective deflection amount δin the direction of body length and the maximum straightening reaction force P are used as variables and controlling the rolling reduction for straightening of a roller leveler 1 so that the value of this discriminant satisfies predetermined conditions. The discriminant is y=a+a*IM-a*IM/W+a*δ(T)-a*δ(T)+a*P(T), for example, and the predetermined conditions is a formula (a, y≤k). |
