| 摘要 |
<p>PURPOSE:To realize a proper control for thickness of a plate although an excessive deviation occurs to the plate thickness, by securing a distributed loading between a part of the deviation of the plate thickness and the rest deviation for the tension control system and the under-pressure control system respectively. CONSTITUTION:The plate thickness of a rolling machine is controlled by an under- pressure controller 12 provided to the i-th stand 10 and the stress control system comprising a tension controlling roll 16 provided between the stand 10 and the (i-1)th stand 14, a tension gauge signal converter 18, a tension controller 20 and a speed controller 22. The output of a plate pressure detector 30 that detects the incoming side plate thickness DELTAHi of the stand 10 is fed to an arithmetic device 32. Then a part of the caused deviation of the plate thickness is distributed to the correction amount DELTATbi of target tension value with a ratio decided previously; and the rest deviation is distributed to the under-pressure correction amount DELTASi to be delivered. In case when the new tension target value Ti+Tbi is not within a tension allowance range, a correction is given to the target value. At the same time, the amount of shortage is distributed again to the amount DELTASi.</p> |
