Shape Meter For Tandem Cold Mill

A new shape meter principle is described, which indicates the quality of flatness of cold rolled strip in the course of rolling. This meter measures elongation e of instantaneous waveform of the strip on the line. Value e of a wavy edge was measured during rolling, at the outlet of the last stand of a five stand tandem cold mill, with the shape meter. Elongation ezof wavy edge under free tension was measured with another new instrument. Then correlation coefficient r between e and ezwas calculated. As a result, in the range of 5x 10^-4ez1x10^-3, r=0.979 was obtained. The value of Detectivity emin=5x10^-4was obtained at 10kg/mm²strip tension.