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US 4,596,130 AGranted
Rolling mill
AssigneeNippon Steel Corporation
InventorsHisatoshi Yoshii, Hidekazu Watanabe, Osamu Takemoto, Hiromi Matsumoto
Life of this patent
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Abstract
A rolling mill stand in which at least one of the back-up rolls is given a convex crown around the roll body in an amount from 0.5 mm to 10 mm in diameter and at least one of the work rolls contacting the back-up rolls is given a concave crown around the roll body under the condition: 0.4.times.C.sub.BUR .gtoreq.C.sub.WR .gtoreq.0.15.times.C.sub.BUR Also disclosed are mill arrangements in which at least one rolling mill stand of the above type is incorporated.
Claims2
A rolling mill stand comprising:
- a pair of upper and lower work rolls;
- a pair of back-up rolls to back up the pair of work rolls;
- and
- a bending device for bending the work rolls;
- at least one of said back-up rolls being given a convex crown around the roll body in an amount ranging from 0.5 mm to 10 mm in diameter;
- at least one of said work rolls contacting said one of the back-up rolls being given a concave crown around the roll body under the condition:
- 0.4.times.C.sub.BUR .gtoreq.C.sub.WR .gtoreq.0.15.times.C.sub.BUR
- wherein C.sub.BUR represents an absolute value of the crown in diameter of the back-up roll and C.sub.WR represents an absolute value of the crown in diameter of the work roll.
5 more elements
A rolling mill stand comprising:
- a pair of upper and lower work rolls,
- a pair of intermediate rolls in contact with the pair of work rolls,
- a pair of back-up rolls to back up the pair of intermediate rolls, and
- a bending device for bending the work rolls,
- at least one of said intermediate rolls being given a convex crown around the roll body in an amount ranging from 0.5 to 10 mm in diameter, and
- at least one of said work rolls contacting one of said intermediate rolls being given a concave crown around the roll body under the condition:
- 0. 4.times.C.sub.IR .gtoreq.C.sub.WR .gtoreq.0.15.times.C.sub.IR
- wherein C.sub.IR represents an absolute value of the crown in diameter of the intermediate roll and C.sub.WR represents an absolute value of the crown in diameter of the work roll.
5 more elements
Dependencies are inferred from the claim text.