JPS57160506A - Controlling method for setup of rolling mill - Google Patents

Abstract

PURPOSE:To reduce the offgage length of a material to be rolled by calculating the inlet side position corresponding to the aiming position for controlling the set up in the leading end part of a material to be rolled on the outlet side of rolling mills and controlling the setup by using the actually measured temp. value in said position. CONSTITUTION:First, a temp. measuring position which is the aiming position for controlling the setup is determined on a strip ST on the outlet side of finishing mills F. Then, the temp. measuring position on a strip blank material B1 on the left side of the mills F or the outlet side of roughing mills R corresponding to said position is calculated in accordance with rolling schedules. The temp. in this position is measured with a thermometer T. A controlling part CN calculates the setup in accordance with the moving speed data of the material B1 read from a pulse generator PG when the leading end part of the material B1 passes the thermometer T and the actually measured value of the thermometer T. In accordance with this, it calculates rolling speeds and roll openings and sets up the mills F so as to conform with the calculated values.