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AssigneeNGK Insulators, Ltd.
InventorsHiroshi Utsunomiya, Tetsuo Sakai, Takaya Ueno, Naokuni Muramatsu
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The present invention provides a metal sheet rolling method of rolling a metal sheet with a pair of rolls, as well as a rolled sheet manufactured by the metal sheet rolling method. In the metal sheet rolling method, respective interfaces between the pair of rolls and the metal sheet have mutually different frictions. Additionally at least one of the interfaces may be lubricated by a procedure other than lubrication by coating of a liquid lubricant agent. Alternatively at least one of the interfaces may be subjected to surface treatment by a procedure other than lubrication, or otherwise the pair of rolls may be made of mutually different materials.
A metal sheet rolling method of rolling a metal sheet with a pair of rolls, the metal sheet rolling method mutually differentiating between frictions of respective interfaces between the pair of rolls and the metal sheet and lubricating at least one of the interfaces by a procedure other than lubrication by coating of a liquid lubricant agent, wherein an upper interface-lower interface differential static friction coefficient D is not less 0.15, the upper interface-lower interface differential static friction coefficient being specified as the neater between an absolute value |p| of a difference ‘p’ by subtraction of a static friction coefficient of a lower surface of the metal sheet from a static friction coefficient of an upper surface of the metal sheet and an absolute value |q| of a difference ‘q’ by subtraction of a static friction coefficient of a lower roll from a static friction coefficient of an upper roll of the pair of rolls, where the static friction coefficient represents a coefficient of static friction to a predetermined material.
A metal sheet rolling method of rolling a metal sheet with a pair of rolls, the metal sheet rolling method mutually differentiating between frictions of respective interfaces between the pair of rolls and the metal sheet and making at least one of the interfaces subjected to surface treatment by a procedure other than lubrication, wherein an upper interface-lower interface differential static friction coefficient D is not less than 0.15, the upper interface-lower interface differential static friction coefficient being specified as the greater between an absolute value |p| of a difference ‘p’ by subtraction of a static friction coefficient of a lower surface of the metal sheet from a static friction coefficient of an upper surface of the metal sheet and an absolute value |q| of a difference ‘q’ by subtraction of a static friction coefficient of a lower roll from a static friction coefficient of an upper roll of the pair of rolls, where the static friction coefficient represents a coefficient of static friction to a predetermined material.
A metal sheet rolling method of rolling a metal sheet with a pair of rolls, the metal sheet rolling method mutually differentiating between frictions of respective interfaces between the pair of rolls and the metal sheet and causing the pair of rolls to be made of mutually different materials, wherein an upper interface-lower interface differential static friction coefficient D is not less than 0.15, the upper interface-lower interface differential static friction coefficient being specified as the greater between an absolute value |p| of a difference ‘p’ b subtraction of a static friction coefficient of a lower surface of the metal sheet from a static friction coefficient of an upper surface of the metal sheet and an absolute value |q| of a difference ‘q’ by subtraction of a static friction coefficient of a lower roll from a static friction efficient of an upper roll of the pair of rolls, where the static friction coefficient represents a coefficient of static friction to a predetermined material.
Dependencies are inferred from the claim text.