G - Physics – 05 – D
Patent
G - Physics
05
D
341/42
G05D 5/03 (2006.01)
Patent
CA 1046610
ABSTRACT OF THE DISCLOSURE The present invention provides a new and improved method of automatically controlling gauge adapted to eliminate the formation of off-gauge portions in the rolled material during accelerating or decelerating conditions in the rolling speeds. According to the invention, the thickness of a rolled strip, sheet and foil is detected by a thickness gauge provided at the exit of the rolling mill. The detected result is converted into control functions in dependence on an independent function of deviation value in thickness and the rate of thickness variation. These control functions are multiplied by one another thereby producing a first compensating control input. In addition, the rolling speed of the mill is detected to obtain an absolute value of the rate of changes in the rolling speed, which is multiplied by the control function in dependence on an independent function of deviation value in thickness so that a second compensating control input is obtained. The first and second compensating control inputs are added to an input indica- tive of the thickness deviation value to produce a control input by which the thickness of the strip, sheet and foil is accurately controlled.
237373
Matsumiya Katsuyuki
Ohno Shin'ya
Yamashita Koichi
Kobe Steel
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