Method of making a heat exchanger

Details Method of making a heat exchanger Method of making a heat exchanger

1986-07-21

1987-08-25

Goldberg, Howard N.

Metal working

Means to assemble or disassemble

Puller or pusher means, contained force multiplying operator

291573A, 29458, 228183, 228224, B21D 5302, B23P 1526

Patent

active

046883118

ABSTRACT:
A tube having a plurality of hydraulically parallel fluid passages for use in a heat exchanger can be made by forming an elongated, undulating insert and disposing the same within a flattened tube. A noncorrosive brazing flux is adhered to at least one of the interior of the tube and the crests on the undulating insert. Braze alloy is also located at the interface of the crests of the insert and the interior wall of the tube. Thereafter, the insert is located within the tube without disturbing the flux and the tube deformed along its length to bring the interior of the tube into contact with the crests on the insert. The assembled tube and insert construction is then heated to braze joints between the interior wall of the tube and the crests of the insert along the entire length of the latter.

REFERENCES:
patent: 2912749 (1959-11-01), Bauernfernd et al.
patent: 3920069 (1975-11-01), Mosier
patent: 3951328 (1976-04-01), Wallace et al.
patent: 4392362 (1983-07-01), Little

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