MULTI-ROLL MANDREL MILL AND METHOD FOR MANUFACTURING SEAMLESS PIPE

Title:

MULTI-ROLL MANDREL MILL AND METHOD FOR MANUFACTURING SEAMLESS PIPE

Document Type and Number:

WIPO Patent Application WO/2011/039942

Kind Code:

A1

Abstract:

A multi-roll mandrel mill in which "roll chock sections have been made compact" is a mandrel mill which comprises a plurality of grooved roll bodies as roll grooves which press down a pipe material, and which is provided with a plurality of rolling stands in which backup rolls for driving the plurality of grooved roll bodies are arranged, respectively, and is characterized in that bearings are stored in the inside of the grooved roll bodies. A multi-roll mandrel mill in which "design of setup-specific roll chock sections or the like has been made appropriate" is a mandrel mill which comprises a plurality of grooved roll bodies as roll grooves which press down a pipe material, and which is provided with a plurality of rolling stands in which roll axes and roll chock sections for driving the plurality of grooved roll bodies are arranged, respectively, and is characterized in that at least one of the roll axes or the roll chock sections in addition to the grooved roll bodies is replaced with different-shaped components according to the pipe making setup of the mandrel mill. Both are effective stretching and rolling devices for preventing underfill or overfill.

Inventors:

YAMANE AKIHITO (JP)

Application Number:

PCT/JP2010/005367

Publication Date:

April 07, 2011

Filing Date:

September 01, 2010

Export Citation:

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Assignee:

SUMITOMO METAL IND (JP)
YAMANE AKIHITO (JP)

International Classes:

B21B17/02; B21B27/02; B21B31/07; B21B31/08

Foreign References:

JPH07314013A	1995-12-05
JPH06511202A	1994-12-15
JP3004479U	1994-11-15
JPS61266104A	1986-11-25
JPH09168806A	1997-06-30
JP2008296250A	2008-12-11
JP2002035810A	2002-02-05
JP2006272340A	2006-10-12

Other References: