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Patent Searching and Data


Title:
SKEW ROLLING METHOD OF SEAMLESS TUBE
Document Type and Number:
Japanese Patent JPH07155807
Kind Code:
A
Abstract:

PURPOSE: To prevent the generation of failure of biting, to increase the degree of freedom in the setting of rolling and to improve yield and productivity in piercing.

CONSTITUTION: In a skew rolling method of a seamless tube, face angles on the inlet side of rolling rolls 31A, 31B are varied in the pass-line direction, the face angle α1 on the inlet side in the region where a material to be rolled begins to contact the rolling rolls 31A, 31B is made relatively smaller and the face angle α1 on the inlet side in the region where the material to be rolled is advanced toward the gorge part after that is made relatively larger.


Inventors:
Shimizu, Tetsuo
Yorifuji, Akira
Application Number:
JP1993000323397
Publication Date:
June 20, 1995
Filing Date:
November 30, 1993
Export Citation:
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Assignee:
KAWASAKI STEEL CORP
International Classes:
B21B19/04; B21B27/02; (IPC1-7): B21B19/04; B21B27/02