| 摘要 |
<p>PURPOSE:To decrease the temp. drop of a roughing mill so as to improve productivity and to decrease the width fluctuation of a rolling material by predicting the rolling temp. with good accuracy at the point of the set-up stage of the roughing mill in the stage of hot rolling a steel slab. CONSTITUTION:A steel slab heated in a heating furnace 1 is rolled to a prescribed thickness and width by vertical rolls 2 and horizontal rolls 3 and is fed to a finishing mill. The temp. at the point of the time when the slab passes the place of a temp detector 4 is predicated from the temp. values of the same ejected material up to the present which are actually measured by the temp. detector 4 and are stored in a calculator 5 and rough rolling schedule as well as the information in the material including the steel kind, components, sheet width, thickness, etc. prior to the engagement of the slab with the vertical rolls 2. The temp. change-component in the rolling mill is then compensated and the engagement temp. is predicted. The max. rolling down capacity of the rolling mill and the width spread of the horizontal mill as well as the effective edging quantity of the vertical rolls are calculated by using such predicted temp. and the rough rolling schedule is determined; thereafter the rolling is executed.</p> |
