Title:
HYDROFORMED ARTICLE
Document Type and Number:
WIPO Patent Application WO/2008/130056
Kind Code:
A1
Abstract:
This invention provides a hydroformed article comprising a metal pipe as a material
which has been integrally worked by cold plastic working. The hydroformed article
is characterized in that (x) one or more bent parts are provided, (y) a tube expanded
part is provided at at least one part of the bent parts. The dimension of the tube
expanded part in a direction toward a bent outer side (or inner side) in a cross
section perpendicular to the tube axis, and in a direction perpendicular to the
direction is at least 1.35 times the equivalent circle diameter of the end of the
metallic pipe, and (z) the inner side (or outer side) of the bent part has a substantially
identical radius of curvature.
Inventors:
MIZUMURA MASAAKI (JP)
KURIYAMA YUKIHISA (JP)
KURIYAMA YUKIHISA (JP)
Application Number:
PCT/JP2008/057993
Publication Date:
October 30, 2008
Filing Date:
April 18, 2008
Export Citation:
Assignee:
NIPPON STEEL CORP (JP)
MIZUMURA MASAAKI (JP)
KURIYAMA YUKIHISA (JP)
MIZUMURA MASAAKI (JP)
KURIYAMA YUKIHISA (JP)
International Classes:
B21D53/88; B21D26/033
Foreign References:
JP2004268068A | 2004-09-30 | |||
JPH08192238A | 1996-07-30 | |||
JP2001212629A | 2001-08-07 | |||
JPH1085870A | 1998-04-07 | |||
JPH09271857A | 1997-10-21 | |||
JP2002100318A | 2002-04-05 | |||
JP2002153917A | 2002-05-28 | |||
JP2006006693A | 2006-01-12 | |||
JPH08192238A | 1996-07-30 |
Other References:
PLASTICITY; KAKOU, WORKING, vol. 45, no. 524, 2004, pages 715
See also references of EP 2147732A4
See also references of EP 2147732A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (Toranomon 37 Mori Bldg.5-1, Toranomon 3-chome, Minato-k, Tokyo 23, JP)
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