Rolling mill
AssigneeHitachi, Ltd.
InventorToshiyuki Kajiwara
Life of this patent
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Abstract
A rolling mill comprises a pair of upper and lower work rolls, upper and lower backup rolls respectively backing those work rolls, upper and lower intermediate rolls interposed respectively between the upper work roll and upper backup roll and between the lower work roll and lower backup roll, and benders connected to the upper and lower intermediate rolls, respectively. This arrangement enables the surfaces of the upper and lower work rolls in contact with a material to be rolled to be made substantially rectilinear.
Claims32
A rolling mill comprising a pair of upper and lower work rolls defining therebetween a nip for material to be rolled, upper and lower backup rolls respectively backing said upper and lower work rolls, an intermediate roll interposed in at least one of positions between said upper work and the lower backup roll, said intermediate roll having a diameter and rigidity greater than the diameter and rigidity of the adjacent one of said work rolls and having a diameter less than the diameter of the backup rolls, and means associated with said intermediate roll to apply bending forces on the same.
A rolling mill, comprising:
- a pair of upper and lower cylindrical work rolls, each rotatably mounted about parallel axes in a common plane, and defining therebetween a nip for passing sheet material to be rolled therethrough in a direction perpendicular to said common plane;
- upper and lower cylindrical backup rolls, each rotatably mounted about parallel axes within said common plane and respectively backing said upper and lower work rolls;
- an intermediate cylindrical roll rotatably mounted about an axis within said common plane, and said intermediate roll being interposed between and in direct continuous line engagement with each of one of said work rolls and the corresponding one of said backup rolls, and said intermediate roll having a diameter and rigidity greater than that of said one work roll and a diameter less than the diameter of said backup rolls;
- and
- means directly coupled to opposite axial ends of said intermediate roll to apply bending forces directly to said opposite ends of said intermediate roll axially outside said lines of contact to directly change the contour of said intermediate roll within said plane and thereby indirectly change the contour of the adjacent work roll by engagement therewith along said line of contact.
Dependencies are inferred from the claim text.