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Patent Searching and Data


Title:
METHOD FOR MANUFACTURING PRESS-MOLDED ARTICLE
Document Type and Number:
WIPO Patent Application WO/2021/025137
Kind Code:
A1
Abstract:
Provided is a method for manufacturing a press-molded article that makes it possible to minimize the incidence of cracking and other molding anomalies in a raw material during press molding, as well as to minimize any trouble when the raw material is transported during press molding. In this method for manufacturing a press-molded article, a manufacturing intermediate is formed by forming a planned-contour-forming part into a flat blank sheet. The planned-contour-forming part, which includes an undulating shape, is used for forming the contour of an external peripheral part of the press-molded article. The blank sheet is kept in a flat shape in a region from the planned-contour-forming part to the center of the manufacturing intermediate, or a projecting medial part having a predetermined medial molding height is formed in the manufacturing intermediate in said region. A through hole is formed by piercing the projection-side top part of the projecting medial part or a flat part in which the flat shape is maintained. Furthermore, the flat part through which the through hole has been formed is molded into a projecting part of predetermined height, or the projecting medial part through which the through hole has been formed is molded into a projecting part of predetermined height that exceeds the medial molding height.

Inventors:
YAMAZAKI SHOHEI (JP)
NISHIMURA RYUICHI (JP)
HAMADA KOICHI (JP)
OISHI TAKUYA (JP)
YOSHIDA TOHRU (JP)
Application Number:
PCT/JP2020/030278
Publication Date:
February 11, 2021
Filing Date:
August 06, 2020
Export Citation:
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Assignee:
NIPPON STEEL CORP (JP)
International Classes:
B21D22/20; B21D22/26; B21D28/26; B21D53/88; B62D25/10
Domestic Patent References:
WO2016103682A12016-06-30
Foreign References:
JP2000042645A2000-02-15
JP2017164774A2017-09-21
Attorney, Agent or Firm:
BRIGHTAS IP ATTORNEYS (JP)
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