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Patent Searching and Data


Title:
HYDROFORMING EQUIPMENT AND HYDROFORMING METHOD
Document Type and Number:
WIPO Patent Application WO/2010/002017
Kind Code:
A1
Abstract:
Provided is hydroforming equipment and a hydroforming method wherein a loading path can be determined easily.  A hydroformed product is obtained by performing a first step where axial compression of a pipe end is carried out while an inner pressure is maintained at a fixed level by using a die into which contact sensors capable of determining contact with a metal pipe are attached at at least two different positions in the axial direction of the pipe, and progress of axial compression is stopped when a contact sensor attached at a position closest to the pipe end and not yet touching a metal pipe senses a contact with a metal pipe, performing a second step for raising only the inner pressure while fixing the position of pipe end and stopping the inner pressure rise when a contact sensor not yet touching the metal pipe determines a contact with the metal pipe, performing a third step for dropping the inner pressure to a level set before raising the inner pressure while still fixing the position of pipe end, and repeating the first through third steps until all the contact sensors sense contacts.

Inventors:
MIZUMURA MASAAKI (JP)
SATO KOICHI (JP)
WADA MANABU (JP)
KURIYAMA YUKIHISA (JP)
Application Number:
PCT/JP2009/062246
Publication Date:
January 07, 2010
Filing Date:
June 30, 2009
Export Citation:
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Assignee:
NIPPON STEEL CORP (JP)
MIZUMURA MASAAKI (JP)
SATO KOICHI (JP)
WADA MANABU (JP)
KURIYAMA YUKIHISA (JP)
International Classes:
B21D26/02; B21D26/033; B21D26/041; B21D26/043
Foreign References:
JPH09314244A1997-12-09
JP2003311343A2003-11-05
JP2003039121A2003-02-12
JP2004230433A2004-08-19
JP2004351478A2004-12-16
JP2007275972A2007-10-25
Other References:
See also references of EP 2319634A4
PROCEEDINGS OF THE 2000 JAPANESE SPRING CONFERENCE FOR THE TECHNOLOGY OF PLASTICITY, 2000, pages 433
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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