Cold rolling method
AssigneeC. D. Wälzholz-Brockhaus GmbH
InventorsHans-Toni Junius, Heinz Hofinghoff
Life of this patent
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Abstract
The present invention relates to a method for cold-rolling metallic rolling stock (4), in which the rolling stock (4) passes through the roll nip (3) between oppositely driven rollers (2) at room temperature in order to undergo a plastic shape change. To avoid the problems caused by the use of liquid coolants and to achieve an improved surface quality of the rolling stock (4), the invention proposes that inert gas, which is at a lower temperature than the rolling-stock temperature in the roll nip, is blown into the region of the roll nip (3). The invention also relates to a cold-rolling stand for carrying out this method.
Claims15
A method for cold-rolling metallic stock, said method comprising:
- passing rolling stock through a roll nip disposed between two oppositely driven rollers;
- injecting a cryogenic fluid, in a liquid phase, into a contact surface of said rolling stock immediately adjacent to said roll nip, said cryogenic fluid being a gas at ambient temperature;
- lubricating said roll nip and said rolling stock with said cryogenic fluid;
- cooling said roll nip and said rolling stock at a contact surface between said roll nip and said rolling stock with said cryogenic fluid;
- and
- inducing a plastic shape change in said rolling stock.
A method for cold-rolling metallic stock, said method comprising:
- (a) admitting a sheet of rolling stock into an inlet side of a roll nip disposed between two oppositely driven rollers;
- (b) injecting a steam of cryogenic fluid, in a liquid phase, on at least said inlet side of said roll nip onto substantially the full width of at least one contact surface of said sheet immediately adjacent said roll nip and substantially tangent to the surface of the respective said roller;
- (c) lubricating said contact surface of said sheet and said surface of said roller in said roll nip with said cryogenic fluid;
- (d) cooling said contact surface of said sheet and said surface of said roller in said roll nip with said cryogenic fluid;
- and thereby
- (e) inducing a plastic shape change in said sheet.
Dependencies are inferred from the claim text.