JPS6422402A - Method and device for specially rolling metal sheet - Google Patents

Abstract

PURPOSE:To expand the tension range and to perform stable rolling by rolling a metal sheet at a large winding angle by winding the metal sheet on a winding roll installed in the vicinity of the inlet or outlet side contact roll and rotating at the same speed as that of the corresponding contact roll. CONSTITUTION:A metal sheet 4 discharged from a winder 5 is wound on an inlet side winding roll 7 at a winding angle theta2, then, is wound on an inlet side contact roll 1 at a winding angle theta1, and reaches a floating roll 3. The sheet 4 is wound on an outlet side contact roll 2 at a winding angle theta3 through the roll 3 and is wound on an outlet side winding roll 8 at a winding angle theta4. Hence, a large inlet side winding angle of theta1+theta2 and a large outlet side winding angle of theta3+theta4 are obtained. Larger winding angle leads rolling to be performed by a stable draft, so that stable rolling is maintained and the quality and yield are improved even if fluctuation in tension and friction coefficient occur.