Title:
STRUCTURAL MEMBER
Document Type and Number:
WIPO Patent Application WO/2011/158923
Kind Code:
A1
Abstract:
A hydroformed joint member for use in structures which has integrally formed protrusions (30a, 30b) on outer peripheral surfaces of a hollow main pipe part (20) is obtained by hydroforming a starting pipe with an outer radius D. In this case, one part of each of the intersecting planes (35a, 35b), which are the projection planes of the terminal surfaces (33a, 33b) of the protrusions (30a, 30b) towards the main tube section (20), share a common plane perpendicular to the main axis (40) of the main pipe part (20). At that time, by delimiting the areas of these portions (36a, 36b) as no less than 30% and no more than 90% of the areas of the intersecting planes (35a, 35b), the protruding height of each protrusion (30a, 30b) can be set to no less than 0.3D, so that the member can function as a joint.
Inventors:
WADA, Manabu (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
和田 学 (〒71 東京都千代田区丸の内二丁目６番１号 新日本製鐵株式会社内 Tokyo, 〒1008071, JP)
MIZUMURA, Masaaki (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
和田 学 (〒71 東京都千代田区丸の内二丁目６番１号 新日本製鐵株式会社内 Tokyo, 〒1008071, JP)
MIZUMURA, Masaaki (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
Application Number:
JP2011/063874
Publication Date:
December 22, 2011
Filing Date:
June 17, 2011
Export Citation:
Assignee:
NIPPON STEEL CORPORATION (6-1 Marunouchi 2-chome, Chiyoda-ku Tokyo, 71, 〒1008071, JP)
新日本製鐵株式会社 (〒71 東京都千代田区丸の内二丁目６番１号 Tokyo, 〒1008071, JP)
WADA, Manabu (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
和田 学 (〒71 東京都千代田区丸の内二丁目６番１号 新日本製鐵株式会社内 Tokyo, 〒1008071, JP)
新日本製鐵株式会社 (〒71 東京都千代田区丸の内二丁目６番１号 Tokyo, 〒1008071, JP)
WADA, Manabu (6-1 Marunouchi 2-chome, Chiyoda-k, Tokyo 71, 〒1008071, JP)
和田 学 (〒71 東京都千代田区丸の内二丁目６番１号 新日本製鐵株式会社内 Tokyo, 〒1008071, JP)
International Classes:
B21D26/037; B21D53/88; B62D21/00; E04B1/58
Attorney, Agent or Firm:
KOKUBUN, Takayoshi (5th Floor, NBF Ikebukuro City Building 17-8, Higashi-Ikebukuro 1-chome, Toshima-k, Tokyo 13, 〒1700013, JP)
Claims: