Heat exchanger and method of making the same

Details Heat exchanger and method of making the same Heat exchanger and method of making the same

1993-10-06

1995-01-17

Fox, John C.

Metal working

Method of mechanical manufacture

Heat exchanger or boiler making

29523, B21D 5302

Patent

active

053816005

ABSTRACT:
A method of making an automotive heat exchanger comprises the steps of assembling a heat exchanger core having a plurality of interleaved tube and fins disposed between a pair of endsheets and expanding the diameter of the tubes a predetermined distance by forcing an expansion tool therethrough. The tubes of the heat exchanger include a plurality of internal projections of predetermined height and the expansion process decreases the height of the projections by less than 25% of its original height. A heat exchanger formed in accordance with this method is also disclosed.

REFERENCES:
patent: 3467180 (1969-09-01), Pensotti
patent: 3517536 (1970-06-01), Fitzmaurice
patent: 4004441 (1977-01-01), Leszak
patent: 4720902 (1988-01-01), Gray
patent: 4847989 (1989-07-01), Franks
patent: 5190101 (1993-02-01), Jalilevand et al.

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