PURPOSE: To quantatively control the size of a bellows by controlling a temper rolling mill in the rolling pressure, the outlet side tension and the height of an auxiliary roll provided near the outlet side so that the size of the bellows is measured and the size takes a prescribed value.
CONSTITUTION: A comparison arithmetic unit 14 finds the difference between a measured value of a bellows sensor 13 and a target size of the bellows. A controller 15 controls a rolling down decide 5 of the temper rolling mill 2, a driving motor 9 of a bridle roll 8 on the outlet side, a cylinder 12 of an auxiliary roll 11 on the outlet side, in accordance with an operation value of the comparison arithmetic unit 14 to control the rolling pressure, the tension on the outlet side of the rolling mill and the height of the auxiliary roll 11. In this way, the size of the bellows can be controlled quantatively.
KOKADO FUMIO
AKIZUKI TOSHIO
