METHOD OF MANUFACTURING METAL BARS AND APPARATUS THEREFOR

Title:

METHOD OF MANUFACTURING METAL BARS AND APPARATUS THEREFOR

Document Type and Number:

WIPO Patent Application WO/1993/005897

Kind Code:

A1

Abstract:

An intermediate billet, which has been rolled by a rough roll train of a bar rolling mill, is finish rolled to obtain N pieces of strands connected to one another through thin connecting portions. Next, strands at opposite ends are cut off at the connecting portions by slit rolls, and subsequently, strands at opposite ends out of a plurality of intermediate strands, which have not been cut off, are cut off at the connecting portions by the slit rolls. Thenceforth, the cut-off of strands at opposite ends at the connecting portions is repeated, whereby all of the strands are cut off at the connecting portions by the slit rolls, and subsequently, the strands thus cut off are simultaneously rolled, to thereby manufacture N pieces of metal bars at the same time.

Inventors:

MATSUO GIICHI (JP)
SAKAI AKIRA (JP)

Application Number:

PCT/JP1991/001263

Publication Date:

April 01, 1993

Filing Date:

September 21, 1991

Export Citation:

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Assignee:

NIPPON KOKAN KK (JP)

International Classes:

B21B1/08; B21B1/16; B23D19/00; B21B15/00; B21B27/02; (IPC1-7): B21B1/16; B21B15/00

Foreign References:

JPH0153121B2	1989-11-13
JPS6018241B2	1985-05-09
JPS622882B2	1987-01-22
JPH0221882B2	1990-05-16

Other References: