| 摘要 |
<p>PURPOSE:To improve the accuracy in plate thickness by using a detection plate thick ness and detection plate length at an inlet side and outlet side, correcting a rolling reduction amt. based on the established rule of a mass flow in the case of a rolling mill being at the time of an acceleration and speed reduction and correcting the rolling reduction amount by using the detection plate thickness in the case of a constant speed time. CONSTITUTION:The plate lengths at the inlet side and outlet side of a rolling mill are detected by an inlet side plate length gage 24, outlet side plate length gage 34. The plate thickness at the inlet side of a rolling mill is detected. Then, whether the rolling speed of a rolling mill is in a constant speed state or in a speed acceleration and reduction state is detected in order to operate or judge the output of the rolling reduction with the automatic plate thickness controller of either that by the established rule of a mass flow or that by a feed forward control. At the time of a speed accelera tion or deceleration, the operation of the value to correct the rolling reduction amt. is performed to perform the automatic plate thickness control by the mass flow estab lished rule and at a constant speed time the rolling reduction correction amt. is operat ed with that by a feed forward control. This correction amt. is outputted to an electro- hydraulic servo valve 30 to perform the plate thickness control.</p> |
