| 摘要 |
<p>PURPOSE:To provide a method for correcting and controlling a roll gap in a bar steel rolling mill capable of quickly correcting the roll gap in accordance with caliber wear. CONSTITUTION:This is a method for correcting and controlling the roll gap in the bar steel rolling mill wherein two or more rolling mills provided with a pair of work rolls driven by variable speed are arranged in cascade and roll rolling-down devices having a function to regulate the roll gap between the work rolls are provided in each rolling mill. A physical quantity of operation is grasped in accordance with the operation of the work roll easy to detect such as the unit weight of a product and the number of rotation of the work roll of each mill and the input current value of a work roll driving motor, etc., and when the present value of the unit weight of the product exceeds the allowable value of a reference value, a deviation of the present value in a rolling time of the operating physical quantity from its reference value is calculated, a quantity of wear of the roll is calculated based on the deviation to correct the roll gap by a rolling reduction device with the obtained quantity of wear as a quantity of correction for the roll gap.</p> |
