HYDROFORMING METHOD

PROBLEM TO BE SOLVED: To provide a hydroforming method which attains a forming upto a large tube expansion ratio without causing burst or buckling. SOLUTION: In the hydroforming method in which a metallic tube is set in a die and in which, after clamping, an internal pressure and an axial thrusting...

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Bibliographische Detailangaben
Hauptverfasser:	IGUCHI KEINOSUKE, KURIYAMA YUKIHISA, MIZUMURA MASAAKI, SATO KOICHI, HIROSHIGE ITSURO
Format:	Patent
Sprache:	eng
Schlagworte:	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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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a hydroforming method which attains a forming upto a large tube expansion ratio without causing burst or buckling. SOLUTION: In the hydroforming method in which a metallic tube is set in a die and in which, after clamping, an internal pressure and an axial thrusting force are imparted to the metallic tube; while being expanded in one direction of the tube cross section, the metallic tube is deformed for two times the wall thickness to 1.4 times the diameter of the base tube (except the equal diameter) in the direction orthogonal to that one direction. Then, while being expanded in the direction orthogonal to that one direction in the cross section, the metallic tube is formed to two times the wall thickness to 1.4 times the post-deformation width in that one direction. COPYRIGHT: (C)2004,JPO&NCIPI