| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a plate thickness control method for a rolling machine having sinking compensation of an expansion rod in a hydraulic rolling-down cylinder.SOLUTION: A plate thickness control method for a rolling machine 13 controls gap amount when conducting reverse rolling of a rolled material W over a plurality of paths using the rolling machine 13 including a pair of work rolls 5 in which the gap amount can be adjusted by a hydraulic rolling-down cylinder 7. In the plate thickness control method, a waveform of rolling load at a tip of the rolled material W in the next path is estimated from a waveform of rolling load at a tail tip of the rolled material W in the previous path, a waveform of sinking amount of the hydraulic rolling-down cylinder 7 is estimated from the estimated waveform of the rolling load at the tip, a compensation command value for the hydraulic rolling-down cylinder 7 is calculated on the basis of the estimated waveform of the sinking amount of the hydraulic rolling-down cylinder 7, and the calculated compensation command value is applied to the hydraulic rolling-down cylinder 7.</p> |
