Method and apparatus of stably controlling rolling mill
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United States of America Patent
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-
Jul 4, 2000
Grant Date -
N/A
app pub date -
Jul 21, 1999
filing date -
Jul 23, 1998
priority date (Note) -
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status (Latency Note)
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Abstract
In a stabilization control of rolling, proportional differential control of snake motion of a to-be-rolled material caused during a rolling process, is achieved on the basis of a lateral deviation of loads which are detected by load sensors disposed on a rolling mill, an instruction value for lateral deviation leveling is calculated from the lateral deviation and given to a draft device, and a roll gap is adjusted on the basis of the instruction value to stabilize the snake motion of the to-be-rolled material. A stabilization low-pass filter having a pole time constant substantially equal to a zero-point time constant of operation frequency characteristics of the rolling mill is employed in the proportional control.
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