Title:
BORING DEVICE, PLUG USED IN BORING DEVICE, AND METHOD FOR MANUFACTURING STEAMLESS STEEL PIPE
Document Type and Number:
WIPO Patent Application WO/2013/065780
Kind Code:
A1
Abstract:
Provided is a boring device wherein the occurrence of flaws in the inner surface of a hollow shell is suppressed. A boring machine (10) according to an embodiment of the present invention is a boring device (10) for boring a billet (18). The boring device (10) comprises a plug (14). The plug (14) has a through-hole (30). The through-hole (30) extends along a central axis, and a central part of the billet (18) to be bored is passed therethrough.
More Like This:
WO/2009/119245 | METHOD FOR PRODUCING SEAMLESS PIPE |
WO/2014/048670 | DEOXIDATION OF CROSS-ROLLED HOLLOW BLOCKS |
Inventors:
SHIMODA KAZUHIRO (JP)
YAMAKAWA TOMIO (JP)
YAMANE KOUJI (JP)
INOUE YUJI (JP)
SHIMOOKA SYUSUKE (JP)
MURAMATSU KOUJI (JP)
YAMAKAWA TOMIO (JP)
YAMANE KOUJI (JP)
INOUE YUJI (JP)
SHIMOOKA SYUSUKE (JP)
MURAMATSU KOUJI (JP)
Application Number:
PCT/JP2012/078315
Publication Date:
May 10, 2013
Filing Date:
November 01, 2012
Export Citation:
Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
B21B19/04; B21B25/00
Domestic Patent References:
WO2006134957A1 | 2006-12-21 | |||
WO2004052569A1 | 2004-06-24 |
Foreign References:
JPS4868455A | 1973-09-18 | |||
JPS5750233A | 1982-03-24 | |||
JPH01180712A | 1989-07-18 | |||
JPS4867165A | 1973-09-13 | |||
JPH11244913A | 1999-09-14 | |||
JP2009018338A | 2009-01-29 | |||
JPH02224856A | 1990-09-06 |
Other References:
See also references of EP 2774695A4
Attorney, Agent or Firm:
UEBA Hidetoshi et al. (JP)
Hidetoshi Ueha (JP)
Hidetoshi Ueha (JP)
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Claims: