PLATE THICKNESS CONTROL METHOD IN THICK PLATE ROLLING

Japanese Patent JP2016131975

A

PROBLEM TO BE SOLVED: To provide a plate thickness control method in thick plate rolling which can prevent the minus crown of a bite-in end and that of a bite-off end from getting excessive over a stationary part even when a slab is heated higher at both longitudinal ends than at the center.SOLUTION: A plate thickness control method has: the process (step 100, 110) for applying an estimated rolling load of rolling and a set bending force before the rolling to a plate crown estimated model to calculate a plate crown amount, and for previously determining an influence coefficient for a change in rolling load influencing an obtained plate crown amount and for a change in bending force, respectively; and the process (steps 200, 210, 220) for calculating a plate crown amount from an actual rolling load and an actual bending force by using the predetermined influence coefficient, and for increasing a target outlet side plate thickness of an automatic plate thickness control (AGC) by a fall of the obtained plate crown amount as the obtained plate crown amount falls below a predetermined threshold value.SELECTED DRAWING: Figure 1

OBARA KOHEI
KAWAHARA ATSUSHI
HIRATA NAOTO
MIYANO TAIKI
NOBE RYOTA
TAKEMURA YUSAKU

JP2015005934A

July 25, 2016

January 15, 2015

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JFE STEEL CORP

B21B37/18; B21B37/00; B21B37/38

JP2005111546A	2005-04-28
JPH06304630A	1994-11-01
JP2005111546A	2005-04-28
JPH06304630A	1994-11-01

Kenichiro Ochiai

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