SHAPE CONTROL METHOD IN PLATE ROLLING

摘要

PURPOSE:To obtain the plate of good shape in the whole plate width by finding the steepness distribution in the plate width direction excluding the detection value of a plate end part and controlling by using four shape evaluation parameters found based on this steepness distribution and the shape evaluation parameter found based on the detection value of the plate end part. CONSTITUTION:A plate shape is detected at the outlet side of a rolling mill to find the steepness distribution in the plate width direction expressed by a biquadratic equation excluding the detection value of a plate end part. The two shape evaluation parameters indicating symmetric component with respect to the plate width center, two parameters indicating asymmetric component and the shape evaluation parameter found based on the detection value of the plate end part are found from the steepness distribution. The plate shape is then controlled by adjusting the operation amt. of a shape controlling means according to these shape evaluation parameters. The plate of good shape at the whole plate width zone can thus be obtd. even if a big lug wave-shaped detect be caused at the plate end part.