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Patent Searching and Data


Title:
PIPE EXPANDER
Document Type and Number:
WIPO Patent Application WO/2016/009653
Kind Code:
A1
Abstract:
A pipe expander whereby steel pipes can be manufactured at low cost is provided. The pipe expander comprises a cone (170) which is fitted to the leading end of a draw bar connected to a cylinder and has a perimeter that gradually increases in size along an axial direction and an expanding head outer surface member (22) which is disposed over the perimeter of the cone, and when the cone is pulled in the axial direction by the cylinder, the wedge action of the cone and the expanding head outer surface member causes the expanding head outer surface member to expand in a radial direction, thereby expanding a steel pipe disposed on the perimeter of the expanding head outer surface member. This pipe expander is characterized in that the cone has a detachable liner (171) on a surface contacting the expanding head outer surface member.

Inventors:
YAZAKI TAKURO (JP)
MIWA TOSHIHIRO (JP)
HORIE MASAYUKI (JP)
TATENO JUNICHI (JP)
Application Number:
PCT/JP2015/003598
Publication Date:
January 21, 2016
Filing Date:
July 16, 2015
Export Citation:
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Assignee:
JFE STEEL CORP (JP)
International Classes:
B21D3/14; B21D39/20
Foreign References:
JP2001259763A2001-09-25
JP2007284519A2007-11-01
JPH08300070A1996-11-19
JP2014083560A2014-05-12
JPH07290170A1995-11-07
JPH01299723A1989-12-04
JPH05195158A1993-08-03
JP2007284519A2007-11-01
Other References:
"Tekko Binran", vol. 3
See also references of EP 3170571A4
Attorney, Agent or Firm:
KUMASAKA, Akira et al. (JP)
Akira Kumasaka (JP)
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