METHOD FOR MANUFACTURING PRESS-MOLDED ARTICLE

Title:

METHOD FOR MANUFACTURING PRESS-MOLDED ARTICLE

Document Type and Number:

WIPO Patent Application WO/2019/031248

Kind Code:

A1

Abstract:

Provided is a method for manufacturing a press-molded article in which springback in the width direction along the longitudinal direction can be reduced without using an intricate die. In the manufacturing method, a metal sheet is pressed and shaped into a product form (1) which has a cross-sectional shape defined by side wall sections (1B) continuous from both sides in the width direction of a top plate section (1A) and which includes a curved section curved in the width direction along the longitudinal direction. The manufacturing method comprises: a first step (10B) for manufacturing an intermediate component by shaping the curved section such that the length of a curved convex side WA along the longitudinal direction is less than the length of the product form (1) and that the length of a curved concave side WB along the longitudinal direction is greater than the length of the product form (1); and a second step (10C) for shaping the intermediate component such that the length of the curved convex side WA is greater than the length thereof in the first step (10B) and that the length of the curved concave side WB is less than the length thereof in the first step (10B).

Inventors:

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

Application Number:

PCT/JP2018/027943

Publication Date:

February 14, 2019

Filing Date:

July 25, 2018

Export Citation:

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Assignee:

JFE STEEL CORP (JP)

International Classes:

B21D22/26; B21D22/00; B21D22/20

Domestic Patent References:

WO2017141603A1

2017-08-24

Foreign References:

JP2015131306A	2015-07-23
JP2008221289A	2008-09-25
JP2007313533A	2007-12-06
JP2015174124A	2015-10-05
JP2010064138A	2010-03-25
JP2017152412A	2017-08-31

Other References: