Rolling mill for forming seamless tubes, and seamless tube-makin

Details Rolling mill for forming seamless tubes, and seamless tube-makin Rolling mill for forming seamless tubes, and seamless tube-makin

1977-01-17

1978-05-30

Mehr, Milton S.

Metal deforming

By use of roller or roller-like tool-element

With tool inside hollow work

B21B 1710

Patent

active

040916502

ABSTRACT:
The specification discloses a rolling mill for forming seamless tubes from n extruded blank wherein the mandrel is driven through the milling gap in a direction tangential to the milling rolls at a speed of from about 5% to about 10% of that of the tube blank during milling. Similarly the mandrel has a length of from about 5% to about 10% of that of the tube blank.
A further pair of milling rolls may be provided, adjacent the first and rotatable about mutually parallel axes orthogonal to the mutually parallel axes of rotation of the first pair of rolls in which case the mandrel will be twice as long as that required for a single milling roll gap.

REFERENCES:
patent: 3392565 (1968-07-01), Rodder

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