Process for manufacturing seamless metal tubes

Details Process for manufacturing seamless metal tubes Process for manufacturing seamless metal tubes

1981-07-09

1983-10-18

Larson, Lowell A.

Metal deforming

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

With metal deformation of different type

72 97, 72368, B21B 1906

Patent

active

044098103

ABSTRACT:
The present invention relates to manufacturing process of seamless metal tubes by elongating mill such as Mannesmann mandrel mill. Shells are subjected to rolling operation with main object of wall thickness equalization by means of a rotary mill having 3 rolls without any internal tools such as mandrel bar or plug. This process improves wall eccentricity and enables to decrease the number of billets as materials for tube making.

REFERENCES:
patent: 3495429 (1970-02-01), Muller

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