JPS6487007A - System for controlling rolling - Google Patents

Abstract

PURPOSE:To perform rolling control with a good yield by finding an actual time required to set a target sheet thickness value of a thickness gage with a monitoring means and comparing the time with a time required to change a flying schedule, and properly performing automatic sheet thickness control. CONSTITUTION:A schedule A for a target sheet thickness H1 is changed to a schedule B for a target sheet thickness H2 by using a time of Tsc from a timing P1 to a timing P2. In that time, the time Tsc is calculated by a flying schedule changing function 4b of a computer 4 and an automatic monitoring function 4c calculates an expected value T of a time required to set a target sheet thickness value of a sheet thickness gage 3 at changing time of a flying schedule. A comparison arithmetic function 4d finds a setting start timing based on the expected time T and changing time Tsc. If Tsc>=T, the function 4d sends a setting start command to the gage 3 through a transmission controller 5 at a start of changing and to start setting of a target sheet thickness value. IfDELTATs=T-Tsc, a setting start timing of the gage 3 is advanced by the extent of Ts from a start timing of a flying schedule changing than that of a flying schedule changing start.