METHOD FOR FORMING THIN WALL WELDED TUBE

PURPOSE:To prevent the generation of buckling at edges of a metal strip at the time of roll-forming the metal strip by controlling a bending moment of longitudinal direction applied on the metal strip in a forming way which is a cause of generation of the edge buckling within a tolerance. CONSTITUTI...

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Bibliographic Details
Main Author HAYASHI TOMOTAKA
Format Patent
LanguageEnglish
Published 17.05.1994
Edition5
Subjects
AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKINGWITHOUT ESSENTIALLY REMOVING MATERIAL
MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES,OTHERWISE THAN BY ROLLING
MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL
PERFORMING OPERATIONS
PUNCHING METAL
TRANSPORTING
WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS ORPROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL
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Summary:PURPOSE:To prevent the generation of buckling at edges of a metal strip at the time of roll-forming the metal strip by controlling a bending moment of longitudinal direction applied on the metal strip in a forming way which is a cause of generation of the edge buckling within a tolerance. CONSTITUTION:Set heights of breakdown rolls 3, 3,... without restricting edge parts E, E of a metal strip H, set heights of cluster rolls 4, 4,... or fin pass rolls 5, 5,... are set so that the bottom position of the metal strip on a way of forming is satisfied with the following condition. {1-(1Ei/1E0i)}.Li-1 /12pi t<21 in i=2-N.
Bibliography:Application Number: JP19920311204