Method of and apparatus for producing plate material having uniform width and lengthwise thickness variation

摘要

A method of producing a plate material having a uniform width and a lengthwise thickness variation by imparting plastic deformations to a work by means of widthwise rolling rolls and thicknesswise rolling rolls. The method has the steps of measuring the travelling amounts of the work at the outlet sides of the widthwise rolling rolls and the thicknesswise rolling rolls, continuously changing the roll gap of the widthwise rolling rolls in accordance with the measured travelling amount and a predetermined condition so as to reduce the width of the work at portions of the latter where the width is expected to be increased as a result of the subsequent thicknesswise rolling so that the work after the thicknesswise rolling may have a uniform width, and changing the thickness of the work by continuously changing the roll gap in the thicknesswise rolling rolls in accordance with the measured travelling amount and a predetermined condition. Also, disclosed is an apparatus for carrying out this method.