| 摘要 |
<p>PURPOSE:To prevent surely the squeezing of a steel strip during rolling by detecting the loads in the transverse direction of the strip to be exerted on the right and left side guides on the inlet side of a rolling mill for the steel strip by means of right and left load cells and adjusting the rolling reduction of the right and left rolls from the difference in the output values thereof. CONSTITUTION:The difference DELTAF in the output values from the load cells 3r, 3l is calculated and the value is inputted to an arithmetic unit 5 when the loads FE, FL to be exerted on the right and left side guides 3-1 from the steel strip 1 during rolling are detected by both cells. The comparison between the dead band widths RD determined by the table contained in the unit 5 according to the preliminarily given width and thickness of the strip 1 on the inlet side of the rolling mill 2 and DELTAF is made and if DELTAF>RD, the correction rate DELTAS of the roll parallelism of the mill 2 is determined by using the value DELTAF in the unit 5. The rate DELTAS is commanded by dividing equally the same respectively by DELTAS/2 each to the right and left screw down devices 6r, 6l, by which the parallelism of the upper and lower rolls is corrected. If DELTAF>0, the roll parallelism is corrected in respectively opposite directions by DELTAS/2 in the direction of narrowing the roll gap on the left side and by DELTAS/2 in the direction of opening the roll gap on the right side.</p> |
