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Patent Searching and Data


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.

Inventors:
SHIMODA KAZUHIRO (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:
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Assignee:
NIPPON STEEL & SUMITOMO METAL CORP (JP)
International Classes:
B21B19/04; B21B25/00
Domestic Patent References:
WO2006134957A12006-12-21
WO2004052569A12004-06-24
Foreign References:
JPS4868455A1973-09-18
JPS5750233A1982-03-24
JPH01180712A1989-07-18
JPS4867165A1973-09-13
JPH11244913A1999-09-14
JP2009018338A2009-01-29
JPH02224856A1990-09-06
Other References:
See also references of EP 2774695A4
Attorney, Agent or Firm:
UEBA Hidetoshi et al. (JP)
Hidetoshi Ueha (JP)
Download PDF:
Claims: