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US 3,938,360 AGranted
Shape control method and system for a rolling mill
AssigneeHitachi, Ltd.
InventorsShigeru Shida, Kenichi Yasuda, Hiroshi Awazuhara, Sukebumi Tsumura
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AssigneeHitachi, Ltd.
InventorsShigeru Shida, Kenichi Yasuda, Hiroshi Awazuhara, Sukebumi Tsumura
Estimating the term…
A shape control system for a rolling mill comprises means for operating a roll positioning means to press down the rolls under a preselected load, when no strip to be rolled is fed between the rolls; a calculator of roll position variation for comparing the roll position under the preselected load with a preselected reference roll position; a calculator of roll crown variation for calculating the roll crown variation by using the output from said calculator of roll position variation and a preselected functional relationship; and a calculator of roll bending force for calculating the amount of a roll bending force to be corrected based on the output from said calculator of roll crown variation and feeding the thus calculated correction to roll bender control means.
A shape control system for use with a rolling mill, the system comprising means for detecting the rolling load and roll position, means for determining the variation roll position .DELTA.S.sub.o from the detected rolling load and roll position;
A shape control system for use with a rolling mill, the system comprising means for operating roll positioning means to press down the rolls under a predetermined load when the roll gap equals to zero;
A shape control system for use with a rolling mill, the system comprising first means for detecting the rolling load;
A shape control method for use in a rolling mill comprising the steps of determining a variation of roll position .DELTA.S.sub.o corresponding to a time when the roll gap is zero and under preselected rolling load, and converting the variation .DELTA.S.sub.o into a roll crown variation .DELTA.C.sub.R in accordance with a predetermined functional relation for thereby controlling a shape control means in dependence on the roll crown variation .DELTA.C.sub.R.
Dependencies are inferred from the claim text.