Roll forming apparatus
AssigneeNippon Steel Corporation
InventorsYoshun Yamamoto, Hitoshi Okubo, Yutaka Watanabe, Eizo Uchiyama, Yutaka Yasunaga
Life of this patent
Estimating the term…
Abstract
A roll forming apparatus has an elevatable base that is moved up and down by an elevating mechanism. Carriages are movably mounted on the base on both sides of a forming pass line. Each carriage carries several side rolls that are disposed along the forming pass line. A pair of side roll position adjusting mechanisms are coupled to each carriage. The pair of side roll position adjusting mechanisms move a carriage back and forth to form the desired forming pass. An elevating mechanism is provided to move up and down the base so that the level and inclination of the forming pass line is set as desired.
Claims17
A roll forming apparatus for gradually bending a metal sheet into a desired shape using forming rolls disposed along and on both sides of a forming pass line which comprises:
- an elevatable base which extends in a longitudinal direction and through which a vertical plane passes which is parallel to said longitudinal direction and contains a forming pass line about which the metal sheet is formed;
- means for moving said base up or down in a vertical direction to thereby adjust the height and/or slope of said forming pass line;
- at least one pair of carriages, each one of said pair of carriages being movably mounted on said base on opposite sides of said vertical plane so that the carriages move integrally with the base in the vertical direction, said pair of carriage being movable horizontally in a direction perpendicular to said vertical plane;
- at least three side rolls rotatably mounted on each of said at least one pair of carriages, each of said side rolls having a roll surface for defining a forming pass;
- two side roll position adjusting mechanisms spaced apart in said longitudinal direction and connected between each of said carriages and said base, each of said side roll position adjusting mechanisms being individually adjustable for moving a respective carriage horizontally and orienting said side rolls into a desired position with respect to said vertical plane whereby the metal sheet can be formed into the desired shape;
- and
- means for reducing the distance between a top surface of said base and a point of contact between each of said side rolls and the metal sheet formed by said side rolls, said means comprising at least one bearing pedestal movably mounted below the top surface of said base, a bottom roll rotatably supported on said bearing pedestal, said bottom roll having an upper roll surface for defining the forming pass together with said side rolls and a bottom roll position adjusting mechanism connected between said base and said bearing pedestal for moving said bearing pedestal vertically with respect to said base whereby displacement of said side rolls during forming of the metal sheet is reduced and overall rigidity of said roll forming apparatus is improved.
A roll forming apparatus for gradually bending a metal sheet into a desired shape using forming rolls disposed along and on both sides of a forming pass line which comprises:
- an elevatable base which extends in a longitudinal direction and through which a vertical plane passes which is parallel to said longitudinal direction and contains a forming pass line about which the metal sheet is formed;
- means for moving said base up or down in a vertical direction;
- at least one pair of carriages, each one of said pair of carriages movably mounted on said base on opposite sides of said vertical plane, said pair of carriages being movable horizontally in a direction perpendicular to said vertical plane;
- at least three side rolls rotatably mounted on each of said at least one pair of carriages, each of said side rolls having a roll surface for defining a forming pass;
- two side roll position adjusting mechanisms spaced apart in said longitudinal direction and connected between each of said carriages and said base, each of said side roll position adjusting mechanisms being individually adjustable for moving a respective carriage horizontally and orienting said side rolls into a desired position with respect to said vertical plane whereby the metal sheet can be formed into the desired shape;
- a housing spaced longitudinally from said at least three side rolls and mounted on at least one of said carriages;
- at least one roll rotatably mounted on said housing for removing and preventing twist of the metal sheet to be formed;
- and
- a roll position adjusting mechanism connected between said housing and said at least one roll for moving said roll horizontally with respect to said at least one of said carriages, said at least one roll being movable only along a linear path towards and away from said forming pass line.
Dependencies are inferred from the claim text.