Rolling of rolling material with tension change at the rolling of the tail end of the rolling material
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United States of America Patent
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Apr 14, 2020
Grant Date -
Jan 4, 2018
app pub date -
Dec 30, 2014
filing date -
Dec 30, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
During rolling of front sections of rolling material in a rear group of roll stands of a rolling mill, rear sections of the rolling material are rolled in the front group of roll stands. A run-out speed with which the rolling material is exiting the front group of roll stands is detected. A run-in speed with which the rolling material is entering the rear group of roll stands is detected. A rolling speed with which the rear group of roll stands is driven is controlled by a controller such that a relation of the run-in speed to the run-out speed equals a predetermined value. The predetermined value is kept constant until a time point at which a tail end of the rolling material reaches a predetermined location upstream of the front group of roll stands, and is changed according to a predetermined function after the time point.
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