Title:
ROLLING CONTROL METHOD FOR MANDREL MILL, ROLLING CONTROL DEVICE, CONTROL PROGRAM, AND SEAMLESS TUBE
Document Type and Number:
WIPO Patent Application WO/2006/003975
Kind Code:
A1
Abstract:
A rolling control method for a mandrel mill, a rolling control device, a control program, and a seamless tube. In the method, the press-down position of a first hole type rolling roll disposed on a finish stand (&num i) is displaced outward when a raw tube (S) is rolled on the finish stand (&num i) among stands forming the mandrel mill (M). Also, the press-down position of a second hole type rolling roll disposed on an upstream side stand (&num (i-2)) is displaced outward when a raw tube is rolled on the upstream side stand (&num (i-2)) with the same press-down direction as the finish stand (&num i) positioned nearest the finish stand (&num i). Accordingly, when the seamless tube is manufactured by using the mandrel mill, a part or all of the end part of the raw tube can be accurately rolled to a specified thickness.
Inventors:
YAMANE AKIHITO (JP)
SASAKI KENICHI (JP)
NAKAIKE KOUJI (JP)
SASAKI KENICHI (JP)
NAKAIKE KOUJI (JP)
Application Number:
PCT/JP2005/012042
Publication Date:
January 12, 2006
Filing Date:
June 30, 2005
Export Citation:
Assignee:
SUMITOMO METAL IND (JP)
YAMANE AKIHITO (JP)
SASAKI KENICHI (JP)
NAKAIKE KOUJI (JP)
YAMANE AKIHITO (JP)
SASAKI KENICHI (JP)
NAKAIKE KOUJI (JP)
International Classes:
B21B17/02; B21B37/78; (IPC1-7): B21B17/02; B21B37/78
Foreign References:
| JPS63238906A | 1988-10-05 | |||
| JPH06190406A | 1994-07-12 | |||
| JP2001293511A | 2001-10-23 | |||
| JPH06190406A | 1994-07-12 | |||
| JPH0871616A | 1996-03-19 | |||
| JPS63238906A | 1988-10-05 |
Other References:
See also references of EP 1779939A4
Attorney, Agent or Firm:
Hirose, Shoichi (4-2 Nihonbashi Honcho 4-chom, Chuo-ku Tokyo 23, JP)
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