CONTROLLING METHOD FOR DOUBLING ROLLING OF METALLIC FOIL

摘要

PURPOSE:To improve a product yield by determining the change rate of forward tension from the ratio of the rolling reduction of upper and lower materials and the forward and backward tension values of a rolling material and adjusting the backward tension in accordance with the change rate. CONSTITUTION:A coil consumption calculator 11 and a means 12 for calculating the change rate of the backward tension are provided. A doubling rolling system 15 is disposed. The rotating speed of each un-coiler and the rotating speed of the press rolls of the coilers are inputted to the calculator 11 which calculates the consumption length of the upper and lower materials and the coiling length on the outlet side of a rolling mill. The rolling reduction ratio beta of the upper and lower materials is thereby calculated. The average deformation resistance Km of the rolling material and the forward and backward tensions sigmab*, sigmaf on the side where the backward tension is not changed are further inputted to the means 12 to determine the change rate of the backward tension. Since the upper and low materials are rolled to the same thickness by the above- mentioned method, the product yield is improved.