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)
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:
Assignee:
NIPPON STEEL CORP (JP)
MIZUMURA MASAAKI (JP)
SATO KOICHI (JP)
WADA MANABU (JP)
KURIYAMA YUKIHISA (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:
JPH09314244A | 1997-12-09 | |||
JP2003311343A | 2003-11-05 | |||
JP2003039121A | 2003-02-12 | |||
JP2004230433A | 2004-08-19 | |||
JP2004351478A | 2004-12-16 | |||
JP2007275972A | 2007-10-25 |
Other References:
See also references of EP 2319634A4
PROCEEDINGS OF THE 2000 JAPANESE SPRING CONFERENCE FOR THE TECHNOLOGY OF PLASTICITY, 2000, pages 433
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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