Method permitting the increase of operations of cold pilger mills and an apparatus for the embodiment of this method
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United States of America Patent
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Apr 21, 1987
Grant Date -
N/A
app pub date -
Jan 2, 1985
filing date -
Jan 5, 1984
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The method consists of a cold pilger mill to effect a recoil movement of the chuck upstream followed by a return to its original position, at least once per rolling cycle. The period during which the mandrel is withdrawn with respect to its rolling position is used advantageously for example to carry out the rotation of the mandrel and/or to cause a lubricant under pressure to circulate between the mandrel and the pipe. The method is applied particularly to the rolling of pipes with a large section, with high reduction rates.
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