CURVED CLOSED-SECTION STRUCTURAL COMPONENT AND METHOD FOR MANUFACTURING SAME

Title:

CURVED CLOSED-SECTION STRUCTURAL COMPONENT AND METHOD FOR MANUFACTURING SAME

Document Type and Number:

WIPO Patent Application WO/2011/034203

Kind Code:

A1

Abstract:

Provided is a method for manufacturing, only by a press forming, a polygonal closed-section structural component having a shape curved in the longitudinal direction. The method is used for manufacturing a curved closed-section structural component from two flat metal plates and has: a press forming step for forming a linear or curved fold line on a portion corresponding to the curved shape of a polygon in the longitudinal direction of a flat metal plate and forming a flange portion at least on one side of both ends in the width direction of the flat metal plate; a step in which the flange portions of the press-formed two flat metal plates and the ends without the flange portions are respectively overlapped with each other and the overlapped portions are welded in the longitudinal direction of the flat metal plate, thereby obtaining a closed-section structure; and a step in which both ends of the obtained closed-section structure are fixed by a jig and are compressed toward the central axis of the closed-section structure, thereby obtaining a polygonal closed-section structure using, as a starting point, the fold line formed in the press forming step and curved in the longitudinal direction.

Inventors:

HIGAI KAZUHIKO (JP)
FUTATSUKA TAKAYUKI (JP)
TAMAI YOSHIKIYO (JP)
HIRA TAKAAKI (JP)
YAMASAKI YUJI (JP)

Application Number:

PCT/JP2010/066470

Publication Date:

March 24, 2011

Filing Date:

September 15, 2010

Export Citation:

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Assignee:

JFE STEEL CORP (JP)
HIGAI KAZUHIKO (JP)
FUTATSUKA TAKAYUKI (JP)
TAMAI YOSHIKIYO (JP)
HIRA TAKAAKI (JP)
YAMASAKI YUJI (JP)

International Classes:

B21D51/16; B21D5/01; B21D47/01; B21D51/18

Foreign References:

JPS4715280A
JP2005313203A	2005-11-10
JP2009202233A	2009-09-10
JP2008119723A	2008-05-29
JP2000263169A	2000-09-26
JP2003311329A	2003-11-05

Other References: