Roll former for tube mill
AssigneeTube Machinery Corporation
InventorRalph L. Hankin
Life of this patent
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Abstract
An improved roll former for imparting a predetermined symmetrical curve to an advancing elongated metal strip in a tube mill. The roll former includes two identical rollers, each having a contoured surface for contacting and shaping one half of the metal strip. Each roller is mounted on a shaft which extends substantially perpendicular to a form radius in a central region of the section being formed by such roller. The shafts are mounted for simultaneous pivotal adjustment in both the same direction about a point and in opposite directions about such point to compensate for camber in the strip and to receive different sized rollers.
Claims7
In a mill for forming a tube from an elongated flat strip of metal, an improved roll former for imparting a predetermined symmetrical curve to such strip comprising, in combination, first and second shafts, means mounting said first shaft to pivot in a plane about a point in such plane, means mounting said second shaft in such plane to pivot about said point, adjustment means for simultaneously pivoting said shafts in such plane equally in opposite directions about said point whereby said shafts may be selectively pivoted towards and away from one another, a symmetrical first roller mounted to rotate on said first shaft about an axis of symmetry, and a symmetrical second roller mounted to rotate on said second shaft about an axis of symmetry, said first and second rollers each having contoured external surface means for imparting one half of the predetermined symmetrical curve to such strip when such strip is longitudinally advanced between said rollers.
In a mill for forming a tube from an elongated flat strip of metal, an improved roll former for imparting a predetermined symmetrical curve to such strip as such strip is advanced longitudinally through said roll former comprising, in combination, first and second symmetrical rollers each having a surface corresponding in contour to one half of the predetermined symmetrical curve, means mounting said first roller to rotate about a first axis, said first axis extending substantially perpendicular to a form radius in a central region of said contoured surface on said first roller, means mounting said second roller to rotate about a second axis, said second axis extending substantially perpendicular to a form radius in a central region of said contoured surface on said second roller, and means mounting said rotatable rollers with said first and second axes skewed with respect to a form radius at the center of the predetermined symmetrical curve for imparting such predetermined symmetrical curve to such strip when such strip is longitudinally advanced between said rollers including means for simultaneously pivoting said rollers in a plane perpendicular to the path along which such strip is advanced and about a point located in said plane immediately below the center of such advancing strip.
An improved former for imparting a predetermined symmetrical curve to an advancing elongated strip of metal comprising, in combination, first and second rollers each having an axis of symmetry and each having a surface corresponding in contour to one half of the predetermined symmetrical curve, said contoured surface on each roller having a minimum radii variation with respect to the axis of symmetry for such roller, means mounting said first roller to rotate about its axis of symmetry, means mounting said second roller to rotate about its axis of symmetry, said axes of symmetry lying in a plane perpendicular to the path of the advancing strip of metal and intersecting below the center of the advancing strip of metal, and adjustment means for simultaneously pivoting said first and second roller axis in the same direction in said plane about the point of intersection of said axes.
Dependencies are inferred from the claim text.