Patent ID: 6519990
Filing Date: 2003-02-18
Classification: B21B

Abstract:
A method for controlling a rolling mill comprising a first mill stand and a second mill stand located downstream of the first mill stand, each mill stand comprising two spaced rolls, the method comprising:feeding an elongated material between the spaced rolls of the first and second mill stands by rotating the rolls of the mill stands; measuring a width of the elongated material at a location downstream of the second mill stand; adjusting, if the measured width is not within first upper and lower limit values, an interstand tension between the first and second mill stands, wherein the tension is adjusted to a value corresponding to a deviation of the measured width from the first upper and lower limit values, wherein said adjusting controls the width of the material to be within the first upper and lower limit values; detecting a position of the elongated material at a location between the first and second mill stands when the material is in contact with both the first and second mill stands; and decreasing a compressive stress in the material between the first and second mill stands if the detected position is not within position limit values.