| 摘要 |
<p>PURPOSE:To control the sheet thickness, by obtaining the deviation of sheet thickness detected on the run-out side of the downstream mill from the set point of sheet thickness, and by controlling the speed difference between upper and lower rolling rolls or the interstand tension correspondingly to above obtained thickness deviation. CONSTITUTION:The thickness gauge 16 detects sheet thickness on the run-out side of upper and lower rolling rolls 4, 3. Then, the sheet thickness control circuit 17 produces a thickness correction signal correspondingly to the deviation of this detected sheet thickness from the value of sheet thickness set in the sheet thickness setting circuit 18. Here-upon, if the sheet thickness correction signal is below the limit value for the sheet thickness control output, the sheet thickness control out-put limiting circuit 19 produces a thickness correction signal as the speed difference correction signal by which the speed of the upper roll 4 is altered. Meanwhile, if the sheet thickness correction signal is above the limit value of the sheet thickness control output, the speed of the upper roll 4 is altered within the limit of this control output, and the residual excess is produced as the tension set correction output to correct the tension.</p> |
