Cold rolling process for tubes, by means of a Pilger rolling mil

Details Cold rolling process for tubes, by means of a Pilger rolling mil Cold rolling process for tubes, by means of a Pilger rolling mil

1984-07-30

1987-02-10

Husar, Francis S.

Metal deforming

By use of roller or roller-like tool-element

Comprising tool movable relative to stationary work-portion...

72208, 72250, B21B 2104

Patent

active

046415130

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.

REFERENCES:
patent: 3030835 (1962-04-01), Krause
patent: 4157025 (1979-06-01), Vydrin et al.

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