| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a rolling method of bar steel by which the bar steel is rolled with high dimensional accuracy. SOLUTION: In the rolling method, is rolling load is measured at the time of rolling a rolled stock 1 with a universal mill 11 and the succeeding rolled stock 1 is rolled by correcting roll gaps based on the measured rolling load. In such a case, the inlet-side temp., inlet-side thickness and outlet-side thickness of the rolled stock and the rolling load of the vertical rolls 12, or the horizontal rolls 13 are taken as the variable factor of the rolling load, the sum of terms obtd. by that the variation amount of each variable factor is multiplied by respective influence coefficients is taken as a rolling load variation amount model equation, rolling load is estimated by determining the inlet-side temp. of the rolled stock 1 from the the measured inlet-side thickness, measured rolling load of the the rolled stock 1 and the rolling load variation amount model equation, and the roll gaps of the vertical rolls 12 and horizontal rolls 13 are corrected based on the estimated rolling load.</p> |
