Title:
METHOD FOR PRESS-MOLDING STEEL PIPE AND METHOD FOR PRODUCING STEEL PIPE
Document Type and Number:
WIPO Patent Application WO/2014/192043
Kind Code:
A1
Abstract:
Provided are: a method for press-molding a steel pipe having a low variability of the seam gap at an abutted section; and a method for producing a steel pipe. The method molds a steel pipe by subjecting a steel plate to a plurality of repetitions of press bending processing to mold the steel plate and is characterized in that, from the state in which an open pipe that is the molded member has a specific seam gap during the final repetition of press bending processing, in accordance with a predetermined relationship between the specific seam gap and a further needed additional rolling reduction, subjects the open pipe to additional rolling reduction processing that is on the basis of the relationship from the state in which the open pipe that is the molded member has the specific seam gap during the final repetition of press bending processing.
Inventors:
HORIE MASAYUKI (JP)
TAMURA YUKUYA (JP)
MIWA TOSHIHIRO (JP)
HORIGIWA KOUZI (JP)
TAMURA YUKUYA (JP)
MIWA TOSHIHIRO (JP)
HORIGIWA KOUZI (JP)
Application Number:
PCT/JP2013/003435
Publication Date:
December 04, 2014
Filing Date:
May 30, 2013
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B21C37/08; B21D5/01
Foreign References:
| JP2012170977A | 2012-09-10 | |||
| JPH10166059A | 1998-06-23 | |||
| JP2003154411A | 2003-05-27 | |||
| JPH11129031A | 1999-05-18 |
Other References:
See also references of EP 3006129A4
Attorney, Agent or Firm:
KUMASAKA, Akira et al. (JP)
Akira Kumasaka (JP)
Akira Kumasaka (JP)
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