| 摘要 |
PURPOSE:To stabilize a strip steel passing after reopening of rolling due to the roll changing, etc. and to increase the yield by changing the roll opening of a finishing rolling mill based on the tipmost shape of the strip steel detected after rough rolling and a profile shape value in a plate width direction. CONSTITUTION:An image of a tipmost part of a strip steel 2 is picked up by a camera device 4 after its coming out of a rough rolling mill 1 and an image processing is performed by a microcomputer 5 and the area at the drive side and work side of the tipmost part of the strip steel is calculated as well. The opening command changing quantity in a finishing rolling mill 6 is found based thereon and by adding this to a rolling reduction device 61 the out-of pass line (meandering) at the outlet side of the rolling mill can be prevented. The strip steel passing after reopening of rolling due to the roll changing, etc. is thus stabilized and the miss-roll is reduced and the yield and operation rate can be increased. |
