ROLLING CONTROL METHOD FOR METAL PLATE, ROLLING CONTROL DEVICE, AND METHOD FOR MANUFACTURING ROLLED METAL PLATE

摘要

A provisional distribution Δε(x) of elongation strain differences for a steel plate during rolling is found under conditions constraining the out-of-plane deformation of the steel plate. The distribution Δεcr(x) of critical strain differences for buckling is found on the basis of the provisional distribution Δε(x) of elongation strain differences, plate thickness and plate width of the steel plate, and tension acting on the steel plate at the rolling machine exit side. When the provisional distribution Δε(x) of elongation strain differences exceeds the distribution Δεcr(x) of critical strain differences for buckling, the difference between the provisional distribution Δε(x) of elongation strain differences and the distribution Δεcr(x) of critical strain differences for buckling is found, and the value obtained by adding this difference to the provisional distribution Δε(x) of elongation strain is found as the true distribution Δε'(x) of elongation strain differences. Rolling conditions are set on the basis of the true distribution Δε'(x) of elongation strain differences, and rolling is carried out on the steel plate. Thereby, the shape of the steel plate can be controlled.