Relation between Flattening Conditions and Surface Strain and Plate Thickness

At Present, the flattening process has been operated by experience and intuition of the expert. On the other hand, the quantification of the flattening condition has been required, and it is urgent to clarify the mechanism of the flattening process.This study carries out the roller leveler flattening for the plate, and it aims at the quantification of the flattening condition, while the mechanism of the flattening process is clarified by surface strain measurement under straightening and contact point observation with the roll, after shape evaluation.As a result, the quality of 3-points bending condition in the top and bottom roll greatly influenced the plate shape by the surface strain comparison of maximum value and roll contact location under flattening, and it became clear that the possible range for flattening had been decided.And, the prospect that the intermesh of the top and bottom roll uniquely sets became possible was obtained as the flattening condition.