Methods and apparatus for reducing seizing in transverse rolling of seamless tube blanks
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United States of America Patent
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May 9, 1989
Issued Date -
N/A
app pub date -
Mar 30, 1988
filing date -
Jul 12, 1985
priority date (Note) -
Expired
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Abstract
A method and apparatus for transverse, preferably skew, rolling seamless tube blanks, is provided wherein said seamless tube blanks are rolled down by a mandrel rod lying in their longitudinal bore or are rolled onto a mandrel rod at the delivery end. During transverse rolling each tube blank is subjected to a predetermined, controllable torque exerted by the mandrel rod in order to eliminate substantially the formation of pockets in the region of the sizing pass during transverse rolling.
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