Cold rolling process for tubes, by means of a Pilger rolling mill and the rolling mill for its execution
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United States of America Patent
Stats
-
Feb 10, 1987
Grant Date -
N/A
app pub date -
Jul 30, 1984
filing date -
Aug 1, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method for cold rolling a tubular blank using a Pilger rolling mill, the tubular blank being rolled between a mandrel, lodged inside it, and the grooves of a pair of rolls, mounted within a stand which performs a back and forth motion along the axis of the tubular blank, the rolls being driven in rotation alternatively in one direction and in the other, in synchronism with the movements of the stand, a forward motion of the blank being done at least at proximity of the downstream neutral point. During at least a part of the return run of the stand, a holding back device, placed on the downstream side relative to the stand, prevents the displacement of the already rolled tubular blank along the rolling axis in the upstream direction during the return rolling run.
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