METHOD FOR CONTROLLING ROLLING SHAPE OF STRIP

摘要

PURPOSE:To roll a steel sheet with which the edge drop is small without the breakdown of the sheet by measuring the tension near the edge of a rolling material and adjusting the taper length of work rolls so that the tension value is kept at a specified value. CONSTITUTION:A tension measuring instrument 3 which measures the tension near the edge of the strip S is disposed to the outlet side of a rolling mill. The rolling length in the tapered part of tapered work rolls 1 is adjusted by axially moving the rolls with an arithmetic control device 4 so that the measured tension value near the edge of the strip is maintained in the specified range where the value does not exceed the breakdown stress of the string S. The tapered length Sw in contact with the edge of the strip S is adjusted to prevent the breakdown of the strip S and to prevent the edge drop during rolling.