Apparatus for assembling tubes in a heat exchanger

Details Apparatus for assembling tubes in a heat exchanger Apparatus for assembling tubes in a heat exchanger

1984-04-30

1986-04-29

Hall, Carl E.

Metal working

Means to assemble or disassemble

Heat exchanger

291573C, 291574, 29523, B23P 1526

Patent

active

045847657

ABSTRACT:
Apparatus for expanding hairpin tubes into a fin pack unit that involves a special clamping fixture for securing the belled ends of the tubes to hold the ends of the tubes immobile as tube expanders are passed through the tubes to expand the tube walls in the fin plates and tube sheets of the unit. The tubes are expanded in tension which permits the bells to be formed against one of the tube sheets thereby eliminating the weakest region in the heat exchanger flow circuit.

REFERENCES:
patent: 3437133 (1969-04-01), Bullard
patent: 3487523 (1970-01-01), Ames
patent: 3688533 (1972-09-01), Ames
patent: 3824668 (1974-07-01), Wightman
patent: 4195540 (1980-04-01), Franks
patent: 4228573 (1980-10-01), Barnard
patent: 4286486 (1981-09-01), Franks
patent: 4321739 (1982-03-01), Martin et al.
patent: 4459917 (1984-07-01), Michael et al.

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