| 摘要 |
<p>PURPOSE:To make the continuous passage of steel strips having different target hardnesses possible by comparing the history temp. and standard history temp. of the steel strips, determining the change component from a standard draft and subjecting the steel strips to temper rolling. CONSTITUTION:A control device 14 for the hardness of steel strip corresponds the change component from the predetermined standard draft of the strip to the position from the head part of the steel strip by a weld zone detector 15 and a meter 16 for the passage length of the steel strip provided on the inlet side of a temper rolling mill 11 by the difference between the history data of the strip temp. in the stage of continuous annealing and respective predetermined reference (standard) values and sets the sum of the standard draft and the change component of the draft for each of the positions from the above- mentioned head part as the target draft to a draft control evice 13. The control device 13 determines monetarily the actual value of the draft by the signals from strip speedometers 12-1, 12-2, changes the control end according to the difference from the target draft and assures always the target draft or the draft as near as said draft.</p> |
