Process for the production of seamless tubes

Details Process for the production of seamless tubes Process for the production of seamless tubes

1999-03-04

2000-07-18

Larson, Lowell A.

Metal deforming

By use of tool acting during relative rotation between tool...

During rotation of work

B21B 1904

Patent

active

060890665

ABSTRACT:
A process for producing a hollow billet for producing tubing for antifriction bearings includes massively reducing a bloom in a three-roll rotary piercing mill and subsequently piercing the reduced bloom in a three-roll rotary piercing mill. The reducing and piercing may be performed in one-pass through the three-roll rotary piercing mill. The reducing and piercing steps may also be performed in separate passes through the same mill or through two separate mills.

REFERENCES:
patent: 3550415 (1970-12-01), Tarenskeen

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