Method of manufacturing electric welded pipes under hot conditio

Details Method of manufacturing electric welded pipes under hot conditio Method of manufacturing electric welded pipes under hot conditio

1990-03-27

1991-04-09

Combs, E. Michael

Metal deforming

By deflecting successively-presented portions of work during...

With modification or control of temperature or work, tool or...

72 52, 72181, 228151, B21D 512, B21D 5100

Patent

active

050053957

ABSTRACT:
A method of producing an electric-welded pipe by continuously shaping a steel sheet into a tubular form in a hot condition is disclosed, which is characterized by employing a forming roll arrangement of the constant pass-line type in combination with the downward bending system.

REFERENCES:
patent: 2370387 (1945-02-01), Anderson
patent: 2563214 (1951-08-01), Croson
patent: 2575381 (1951-11-01), Colby
patent: 3139053 (1964-06-01), Hiroumi
patent: 3323341 (1967-06-01), Chang
patent: 3791020 (1974-02-01), Babbitt
patent: 3938724 (1976-02-01), Nakamura et al.
patent: 4747289 (1988-05-01), Nakamura

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