Pipe stretching apparatus

Details Pipe stretching apparatus Pipe stretching apparatus

1987-02-02

1989-02-14

Jones, David

Metal deforming

By relatively receding work-engaging tool-faces

72370, B21D 5114

Patent

active

048038814

ABSTRACT:
An apparatus for stretching pipe having first and second elongated mandrels each having a longitudinal axis and an outer surface of a predetermined cross-section transverse to the longitudinal axis of each mandrel. A displacement system is included for adjusting the relative distance between the mandrels. A cylindrical spiral ribbed pipe is positioned lengthwise over the mandrels with the mandrels fitting against the inner wall of the pipe. The displacement system increases the relative distance between the mandrels so as to reform the original circular end cross-sectional shape of the pipe.

REFERENCES:
patent: 2916076 (1954-12-01), Young
patent: 3625046 (1971-12-01), Gompel
patent: 3710609 (1973-01-01), Jones
patent: 3996783 (1976-12-01), Messerole
patent: 4027522 (1977-06-01), Clavin
patent: 4571980 (1986-02-01), Goodwin

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