| 摘要 |
<p>PURPOSE:To control the draft fixedly and to perform a rolling under the constant reduction rate highly accurately and stably, by predictively computing the rolling reduction basing on a fixed rule obtained between mass and flow rate of a rolling material in rolling steel sheets by a rolling mill. CONSTITUTION:The sheet thickness of a rolling material 5 at the inlet side of a rolling mill 10 is actually measured with a sheet thickness guage 11 basing on a fixed rule obtained between mass and flow rate in rolling the material 5 by the mill 10. The sheet thickness of the material 5 at the outlet of the mill 10 is computed from the measured value and a desired draft by means of a sheet thickness deviation outputting circuit 13. The sheet thickness at the inlet side is predictively computed by using said computed values and actually measured values of the lengths of the material 5 at the sides of inlet and outlet of the mill. The rolling reduction is controlled so as to make the difference between said predictive sheet thickness and the actually measured sheet thickness at the inlet side to zero by means of a desired draft computing circuit 30, thus the draft of the mill is automatically controlled so as to be the fixed value always.</p> |
