PURPOSE: To easily give a crown suitable for correcting the defective shape of a strip, to a work roll, by axially shifting at least one of a couple of intermediate rolls, respectively having a cylindrical drum reducing diameter toward both ends, against another one.
CONSTITUTION: In such a roll arrangement as illustrated, for example, if a load is given by a backup roll 2, a bending deflection S corresponding to the load, within a range equivalent to a radius decrease R caused along a tapered drum 3b of an intermediate roll 3, is given to a work roll 1. In case of arranging each straight drum 3a of each of a couple of intermediate rolls 3 at the middle zone of the work roll 1, a deflection is caused in the drum of the work roll 1 and a strong bending effect is given to both ends of the work roll 1. If each of a couple of rolls 4 is shifted along the roll axis to mutually opposite sides, the existing region of the straight drum 3a becomes longer so that the bending deflection becomes smaller. If the rolls 3 are shifted further so as to eliminate the region wherein the roll drums 3a overlap, a deflection is caused at the middle zone and both ends of the work roll 1.
SUGANUMA NAMIO
TESHIBA TOUKOU
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