PRESS MOLDED ARTICLE MANUFACTURING METHOD

Title:

PRESS MOLDED ARTICLE MANUFACTURING METHOD

Document Type and Number:

WIPO Patent Application WO/2019/026732

Kind Code:

A1

Abstract:

Provided is a press-manufacturing method with which it becomes possible, even when high tensile steel is used, to greatly reduce a spring-back in a side view, i.e., a camber-back, without making a mold complex. The press-manufacturing method comprises, when a metal sheet is press molded to manufacture a product having a top plate portion (1) and a flange portion (2) which are continuous in a width direction via a side wall portion (3), the product having a hat-shaped cross section such that the top plate portion (1) and the flange portion (2) are bent so as to become convex or concave on the top plate portion (1) side in a longitudinal direction: a first step 10A of manufacturing an intermediate component by press-molding the top plate portion (1) and the flange portion (2) into a component shape having a hat-shaped cross section having a second radius of curvature of the curve in the longitudinal direction smaller than the radius of curvature of the product shape; and a second step 10B of press-molding the intermediate component into the product shape.

Inventors:

TOBITA SHUNSUKE (JP)
SHINMIYA TOYOHISA (JP)
YAMASAKI YUJI (JP)

Application Number:

PCT/JP2018/027942

Publication Date:

February 07, 2019

Filing Date:

July 25, 2018

Export Citation:

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Assignee:

JFE STEEL CORP (JP)

International Classes:

B21D22/26; B21D5/01; B21D22/20

Domestic Patent References:

WO2016136612A1	2016-09-01
WO2017149955A1	2017-09-08

Foreign References:

JP2011206789A	2011-10-20
JP2008221289A	2008-09-25
JP2011206789A	2011-10-20
JP2007190588A	2007-08-02
JP2007286841A	2007-11-01
JP2017150070A	2017-08-31

Other References: