Method of producing composite metal pipe

Details Method of producing composite metal pipe Method of producing composite metal pipe

1977-04-04

1978-11-21

Moon, Charlie T.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

29412, 29417, 29516, 29520, 29130, 138140, B21H 114, B21K 102, B23P 1700, B23P 1100

Patent

active

041259246

ABSTRACT:
A composite metal pipe or tube is formed by cold sink drawing a first pipe to work-harden the walls thereof, and then telescoping a softer pipe thereover and cold sink drawing the telescoped combination to stretch and compress the outer pipe over the work-hardened inner pipe.

REFERENCES:
patent: 1839964 (1932-01-01), Harvey
patent: 2219434 (1940-10-01), White
patent: 3461523 (1969-08-01), Peehs et al.
patent: 3863328 (1975-02-01), Arntz

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