JPS5671513A - Width adjusting rolling method of material to be rolled - Google Patents

Abstract

PURPOSE: To correct roll opening and also correct width largely changed parts to a uniform width by storing the synchronously measured width measurement values of the material to be rolled and reading out said memory when the measured parts reach edger rolls.

CONSTITUTION: In a titled rolling method of disposing a width meter on the inlet side of a roughing mill R6 having edger rolls ER, and correcting edger roll opening by using the width measurement values, the width measurement values of the material to be rolled periodically measured according to sampling clock CKL are stored in a memory M₃ and at the time when the measured parts of the material to be rolled reach the edger rolls ER, that is, every time when said time is detected by the operation of rolling material moving distance measuring systems 40, 50, the measurement value of said measured part is inputted to an arithmetic unit 32 which in turn calculates width control amount WC and corrects the roll opening of the edger rolls ER via a control unit 34. In this way, the width largely changed parts produced in the top and bottom parts of the material to be rolled may be corrected accurately to a uniform width.

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