| 摘要 |
<p>PURPOSE:To adjust a zero point without removing a steel strip from between work rolls by using a draft-position indicating set value obtained from the difference between the thickness of a steel sheet to be rolled and the compressed quantity of a rolling mill as a new draft-position indicating value. CONSTITUTION:A steel strip 2 to be rolled is subjected to rolling reduction to a proper draft position by the rolling reduction device 3 of a mill 1. The compression quantity Z of mill 1 is calculated at that time based on a rolling down force W and a spring constant of mill 1. The thickness T of steel strip 2 at the outlet side of a mill 1 is also measured. A value obtained by subtracting said compression quantity Z from the measured thickness T, i.e. X=T-Z, is indicated in a draft-position-output indicating device 11 as the draft-position indicating value of a draft-position indicator 4.</p> |
