Title:
RETRACT MANDREL MILL AND METHOD FOR ROLLING TUBING
Document Type and Number:
WIPO Patent Application WO/2011/039943
Kind Code:
A1
Abstract:
Disclosed are a retract mandrel mill and a method for rolling tubing using the mandrel mill. The retract mandrel mill is provided with a mandrel mill and an extractor. The mandrel mill includes a mandrel bar and is for rolling a tubing wherein the mandrel bar has been inserted. The extractor is for extracting the mandrel bar from the tubing which has been rolled by the mandrel mill. The distance between the mandrel mill and the extractor is adjustable, thus it is not necessary to increase the length of the tubing to be stretch rolled, even when rolling unusually short tubing, and wear to the mandrel bar can be limited, enabling efficient and good-yield rolling.
Inventors:
YAMANE AKIHITO (JP)
Application Number:
PCT/JP2010/005368
Publication Date:
April 07, 2011
Filing Date:
September 01, 2010
Export Citation:
Assignee:
SUMITOMO METAL IND (JP)
YAMANE AKIHITO (JP)
YAMANE AKIHITO (JP)
International Classes:
B21B17/04; B21B19/10; B21B23/00
Foreign References:
| JPH07214110A | 1995-08-15 | |||
| JP2001205323A | 2001-07-31 | |||
| JPH07214110A | 1995-08-15 | |||
| JPH08117816A | 1996-05-14 | |||
| JPH08300013A | 1996-11-19 | |||
| JP2001205323A | 2001-07-31 |
Other References:
See also references of EP 2484458A4
Attorney, Agent or Firm:
MORI, Michio et al. (JP)
Michio Mori (JP)
Michio Mori (JP)
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