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Patent Searching and Data


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 (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
SHINMIYA Toyohisa (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
YAMASAKI Yuji (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
Application Number:
JP2018/027942
Publication Date:
February 07, 2019
Filing Date:
July 25, 2018
Export Citation:
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Assignee:
JFE STEEL CORPORATION (2-3 Uchisaiwai-cho 2-chome, Chiyoda-ku Tokyo, 11, 〒1000011, JP)
International Classes:
B21D22/26; B21D5/01; B21D22/20
Attorney, Agent or Firm:
TANAKA Hidetetsu et al. (NICHIEI Patent and Trademark Attorneys, Shiroyama Trust Tower 32F 3-1, Toranomon 4-chome, Minato-k, Tokyo 32, 〒1056032, JP)
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