Roll for rolling mill

Claim 2

A roll for use in a rolling mill of a type having upper and lower work rolls arranged in a pair and adapted to roll the material to be rolled in direct contact with the latter, each of said work rolls having diameter of at least 15% of the roll barrel length and, hence, a sufficiently high flexural rigidity, and a pair of axially displaceable rolls arranged at upper and lower sides or only at one side of said pair of work rolls in such a manner that a plane defined by the axes of said axially displaceable rolls substantially or exactly coincides with a plane defined by the axes of said work rolls, said axially displaceable rolls being adapted to be displaced in the axial direction in accordance with the width of the rolled sheet to permit the shape control of said rolled sheet, characterized in that each of said axially displaceable rolls has an axial end portion the diameter of which is gradually decreased toward the axial outer extremity or edge and that the reduction in radius of said axial end portion within the range of 100 mm as measured from the starting point of said axial end portion toward said axial outer extremity is at least 0.3 mm.

Claim 3

A roll as claimed in claim 1, wherein the gradual reduction in radius of said axial end portion is commenced at said starting point with a radius of curbature of 200 mm or greater.

Claim 4

A roll as claimed in claim 2, wherein said radius of curvature falls between 300 mm and 4000 mm.

Claim 5

A roll for use in a rolling mill of a type having upper and lower work rolls arranged in a pair and adapted to roll the material to be rolled in direct contact with the latter, each of said work rolls having a diameter of at least 15% of the roll barrel length and, hence, a sufficiently high flexural rigidity, a pair of intermediate rolls arranged at the upper and lower sides of said pair of work wolls in contact with the latter, said intermediate rolls being displaceable in the axial directions in accordance with the width of the rolled sheet, backup rolls arranged at the upper and lower side of said pair of intermediate rolls in contact with the latter, and means for effecting a roll bending on said work rolls, thereby to effe , a shape control of the rolled sheet by a combination of the axial adjustment of said intermediate rolls and the work roll bending action, characterized in that each of said intermediate rolls has an axial end portion the diameter of which is gradually decreased toward the axial outer extremity or edge and that the reduction in radius of said axial end portion within the region of 100 mm as measured from the starting point of said axial end portion toward said axial outer extremity is at least 0.3 mm.

Claim 6

A roll for use in a rolling mill of a type having upper and lower work rolls arranged in a pair and adapted to roll the material to be rolled in direct contact with the latter, each of said work rolls having a diameter of at least 15% of the roll barrel length and, hence, a sufficiently high flexural rigidity, a pair of intermediate rolls arranged at the upper and lower sides of said pair of work wolls in contact with the latter, said intermediate rolls being displaceable in the axial directions in accordance with the width of the rolled sheet, backup rolls arranged at the upper and lower side of said pair of intermediate rolls in contact with the latter, and means for effecting a roll bending on said work rolls, thereby to effe , a shape control of the rolled sheet by a combination of the axial adjustment of said intermediate rolls and the work roll bending action, characterized in that each of said intermediate rolls has an axial end portion the diameter of which is gradually decreased toward the axial outer extremity or edge and that the reduction in radius of said axial end portion within the region of 100 mm as measured from the starting point of said axial end portion toward said axial outer extremity is at least 0.3 mm.

Claim 7

A roll as claimed in claim 4, wherein the gradual reduction in radius of said axial end portion is commenced at said starting point with a radius of curvature of 200 mm or greater.

Claim 8

A roll for use in a rolling mill of a type having upper and lower work rolls arranged in a pair and adapted to roll the material to be rolled in direct contact with the latter, each of said work rolls having a diameter of at least 15% of the roll barrel length and, hence, a sufficiently high flexural rigidity, a pair of backup rolls disposed at the upper dlnd lower sides of said pair of work rolls and dispace- able in the axial direction in accordance with the width of the rolled sheet, and means for effecting a roll bending on said work rolls, thereby to make the shape control of the rolled sheet by the axial adjustment of said backup rolls, characterized in that each of said backup rolls has an axial end portion the diameter of which is gradually decreased toward the axial outer extremity or edge and that the reduction in radius of said axial end portion within the region of 100 mm as measured from the starting point of said axial end portion toward said axial outer extremity is at least 0.3 mm.

Claim 9

A roll for use in a rolling mill of a type having upper and lower work rolls arranged in a pair and adapted to roll the material to be rolled in direct contact with the latter, each of said work rolls having a diameter of at least 15% of the roll barrel length and, hence, a sufficiently high flexural rigidity, a pair of backup rolls disposed at the upper dlnd lower sides of said pair of work rolls and dispace- able in the axial direction in accordance with the width of the rolled sheet, and means for effecting a roll bending on said work rolls, thereby to make the shape control of the rolled sheet by the axial adjustment of said backup rolls, characterized in that each of said backup rolls has an axial end portion the diameter of which is gradually decreased toward the axial outer extremity or edge and that the reduction in radius of said axial end portion within the region of 100 mm as measured from the starting point of said axial end portion toward said axial outer extremity is at least 0.3 mm.

Claim 10

A roll as claimed in claim 6, wherein the gradual reduction in radius of said axial end portion is commenced at said starting point with a radius of curvature of 200 mm or greater.

Claim 11

A roll for use in a rolling mill of a type having upper and lower work rolls arranged in a pair and adapted to roll the material to be rolled in direct contact with the latter, each of said work rolls having a diameter of at least 15% of the roll barrel length and, hence, a sufficiently high flexural rigidity, backup rolls backing up said work rolls and a pair of intermediate rolls disposed at least between one work roll and the associated backup roll, said intermediate rolls being displaceable in the axial direction to permit a shape control of the rolled sheet, characterized in that each of said intermediate rolls has an axial end portion the diameter of which is gradually decreased toward the axial outer extremity or edge and that the reduction in radius of said axial end portion within the region of 100 mn as measured from the starting point of said axial end portion toward said axial outer extremity is at least 0.3 mm.

Claim 12

A roll for use in a rolling mill of a type having upper and lower work rolls arranged in a pair and adapted to roll the material to be rolled in direct contact with the latter, each of said work rolls having a diameter of at least 15% of the roll barrel length and, hence, a sufficiently high flexural rigidity, backup rolls backing up said work rolls and a pair of intermediate rolls disposed at least between one work roll and the associated backup roll, said intermediate rolls being displaceable in the axial direction to permit a shape control of the rolled sheet, characterized in that each of said intermediate rolls has an axial end portion the diameter of which is gradually decreased toward the axial outer extremity or edge and that the reduction in radius of said axial end portion within the region of 100 mn as measured from the starting point of said axial end portion toward said axial outer extremity is at least 0.3 mm.

Claim 13

A roll as claimed in claim 8, wherein the gradual reduction in radius of said axial end portion is commenced at said starting point with a radius of curvature of 200 mm or greater.