Patent ID: 6513232
Filing Date: 2003-02-04
Classification: B21D,Y10T

Abstract:
A pipe expander of a vertically elongated type for expanding pipes of a heat exchanger, comprising: a supporting frame; cone supporting rods, supported at said frame; supporting means for rods; pipe expanding cones, supported at front end portions of said cone supporting rods to perform a vertical translational motion; a seat provided at said frame for accommodating a heat exchanger to be subjected to pipe expansion, said expanding cones being arranged above said seat; at least one cone supporting rod magazine arranged on a movable carriage; said magazine being arranged vertically with the expanding cones directed downwardly, so as to be arranged, during machine setup, at said seat, said supporting means for cone supporting rods being constituted by a device for engaging and supporting rods at a rear end portions of supporting rods and a selecting device associated with said device for engaging and supporting rods for automatically engaging or releasing selecting rods of the magazine, with said magazine arranged in said seat.