Heat exchanger tube expanding apparatus

Details Heat exchanger tube expanding apparatus Heat exchanger tube expanding apparatus

2006-10-10

2006-10-10

Jimenez, Marc (Department: 3726)

Metal working

Means to assemble or disassemble

Heat exchanger

C029S726500, C029S726000, C029S890040, C029S890044

Reexamination Certificate

active

07117584

ABSTRACT:
A tube expanding apparatus includes mandrels, each mandrel having a billet on a leading end; a reciprocating actuator for supporting rear ends of the mandrels, the reciprocating actuator being supported to reciprocate in an axial direction of hairpin tube straight portions; a pressure cylinder for raising and lowering the reciprocating actuator and expanding the straight portions by pressing the billets into the hairpin tube straight portions; hairpin receivers for supporting curved portions of hairpin tubes; a fin receiver for supporting a lower end portion of the laminated radiating fins; and a hydraulic cylinder for raising and lowering the fin receiver in the axial direction of the hairpin tube straight portions. The hydraulic cylinder lowers the fin receiver to a predetermined position as the mandrels descend and the billets begin to be inserted into the hairpin tubes.

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