PRESS FORMING METHOD AND PRESS FORMING MOLD

Title:

PRESS FORMING METHOD AND PRESS FORMING MOLD

Document Type and Number:

WIPO Patent Application WO/2016/132905

Kind Code:

A1

Abstract:

This press forming method includes: a first step for forming such that linear length in the longitudinal direction of a flange portion undergoing stretch flange deformation is greater than linear length of the flange portion in a product shape and linear length in the longitudinal direction of a flange portion undergoing shrink flange deformation is shorter than the linear length of the flange portion in the product shape by forming using a tool of press forming (1) wherein the linear length in the cross-sectional direction of a jointing portion (3c) in contact with the flange portion undergoing stretch flange deformation or the flange portion undergoing shrink flange deformation is a linear length (L1) in the cross-sectional direction shorter than a linear length (L2) in the cross-sectional direction where the linear length in the cross-sectional direction of the jointing portion (3c) in a second tool of press forming (3) for obtaining the product shape is set to (L2); and a second step for forming the product shape using the second tool of press forming (3) wherein the linear length in the cross-sectional direction of the jointing part (3c) is (L2).

Inventors:

SUMIKAWA SATOSHI (JP)
URABE MASAKI (JP)
HIRAMOTO JIRO (JP)

Application Number:

PCT/JP2016/053207

Publication Date:

August 25, 2016

Filing Date:

February 03, 2016

Export Citation:

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Assignee:

JFE STEEL CORP (JP)

International Classes:

B21D22/26; B21D24/00; B21D5/01

Domestic Patent References:

WO2014208181A1	2014-12-31
WO2013094705A1	2013-06-27

Foreign References:

JP5382281B1

2014-01-08

Other References: