Patent ID: 6012220
Filing Date: 2000-01-11
Classification: B21D,Y10T

Abstract:
Apparatus for expanding hairpin tubes of a heat exchanger coil into locking engagement with a pair of spaced apart tube sheets and a stack of fin mounted between the tube sheets, said apparatus includinga saddle for supporting the bends of the hairpin tubes so that the tubes are vertically disposed within a fixture with the open ends of the tubes being aligned adjacent to a plurality of tube expanders,a door mounted in a front wall of the fixture, said door closing adjacent a front surface of a coil mounted in the fixture,a back wall located opposite said door in said fixture, said back wall having a series of spaced apart vertically aligned stationary slats, anda frame for slidably supporting a plurality of spaced apart vertically aligned moveable slats interspaced between said stationary slats so that said slats coact to provide a flat back surface adjacent a rear surface of said coil whereby the height of the back wall can be adjusted to accommodate various size coils.