Title:
METHOD OF MANUFACTURING CLOSED STRUCTURAL MEMBER, PRESS-FORMING DEVICE, AND CLOSED STRUCTURAL MEMBER
Document Type and Number:
WIPO Patent Application WO/2010/035887
Kind Code:
A1
Abstract:
A method of efficiently manufacturing a closed structural member by using a reduced number of parts and manufacturing processes for the closed structural member.
In a hem pressing step, a punch (84) is further lowered to the press position side to insert a pair of flange sections (20, 22) into a slit groove (102) and to bend a hem projection (28). This causes a flange section (22) to be clamped by the hem projection (28) to thereby join the flange section (20) to the flange section (22). At the same time as above, a metallic plate is pressed by a pair of press-forming surfaces (96) of the punch (84) to form a pair of shoulder sections (26) of a blank (24) into a predetermined shape. As a result, the flange section (20) can be fixed (joined at the hem projection (28) thereof) to the flange section (22) and, at the same time, the pair of shoulder sections (26) of the blank (24) can be pressed into a predetermined shape.
Inventors:
HIGAI, Kazuhiko (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
樋貝和彦 (〒11 東京都千代田区内幸町二丁目２番３号JFEスチール株式会社 知的財産部内 Tokyo, 〒1000011, JP)
YAMASAKI, Yuji (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
山崎雄司 (〒11 東京都千代田区内幸町二丁目２番３号JFEスチール株式会社 知的財産部内 Tokyo, 〒1000011, JP)
樋貝和彦 (〒11 東京都千代田区内幸町二丁目２番３号JFEスチール株式会社 知的財産部内 Tokyo, 〒1000011, JP)
YAMASAKI, Yuji (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
山崎雄司 (〒11 東京都千代田区内幸町二丁目２番３号JFEスチール株式会社 知的財産部内 Tokyo, 〒1000011, JP)
Application Number:
JP2009/067129
Publication Date:
April 01, 2010
Filing Date:
September 24, 2009
Export Citation:
Assignee:
JFE STEEL CORPORATION (2-3 Uchisaiwai-cho 2-chome, Chiyoda-ku Tokyo, 11, 〒1000011, JP)
JFEスチール株式会社 (〒11 東京都千代田区内幸町二丁目２番３号 Tokyo, 〒1000011, JP)
HIGAI, Kazuhiko (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
樋貝和彦 (〒11 東京都千代田区内幸町二丁目２番３号JFEスチール株式会社 知的財産部内 Tokyo, 〒1000011, JP)
YAMASAKI, Yuji (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
JFEスチール株式会社 (〒11 東京都千代田区内幸町二丁目２番３号 Tokyo, 〒1000011, JP)
HIGAI, Kazuhiko (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
樋貝和彦 (〒11 東京都千代田区内幸町二丁目２番３号JFEスチール株式会社 知的財産部内 Tokyo, 〒1000011, JP)
YAMASAKI, Yuji (JFE STEEL CORPORATION 2-3, Uchisaiwai-cho 2-chome, Chiyoda-k, Tokyo 11, 〒1000011, JP)
International Classes:
B21D47/01; B21D22/26; B21D39/02
Attorney, Agent or Firm:
OCHIAI, Kenichiro (7th floor Yanagiya building 1-10, Nihonbashi 2-chome, Chuo-k, Tokyo 27, 〒1030027, JP)
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