Manufacturing device for heat exchanger

A manufacturing device for a heat exchanger, wherein a tube expansion device with a freely reciprocating tube expansion mandrel in predetermined length which can expand said tube in predetermined length from a tube opening portion side of a tube protruded from said end plate of a heat exchanger freely expands and shrinks radially in a direction crossing the longitudinal direction of a tube from a tube opening portion side of a tube protruded from an end plate and has a surface expanding radially toward the direction of a tube at outer circumference, the manufacturing device comprising:

• a gripping body base with a gripping body having a plurality of tube contacting members which can cover said tube, a first reciprocating means causing said gripping body base to move toward a heat exchanger, a reference platform stopping movement of a gripping body base toward a heat exchanger by causing a gripping body base moving toward a heat exchanger to come into contact with a reference platform through the first reciprocating means and freely reciprocating through a second reciprocating means in order to set a protrusion length of a tube protruded from an end plate, a lock means firmly fixing and holding said reference platform and said gripping body base, a gripping body sliding means which is provided with a third reciprocating means between said end plate and a gripping body base and can fit onto and slide on a gripping body having a plurality of tube contacting members, a sliding base with a gripping body sliding means in order to release a tube opening portion from the gripping of a tube contacting member, wherein each of a plurality of tube connecting members is reduced in its diameter by causing said gripping body sliding means to move toward a heat exchanger through a third reciprocating means, and a tube expansion in predetermined length formed through said tube expansion mandrel is held by a plurality of tube contacting members, and a gripping body sliding means is caused to be retreated from a heat exchanger through a third reciprocating means, a flare base which exists more rearward than the gripping body base with a certain distance, fits onto a tube expansion mandrel within the gripping body base and has a flare pipe in predetermined length with a flare punch for flared processing at the tip, a connecting and tensile force generating means which connects the flare base and said gripping body base and generates a tensile force in a direction of pulling each other with certain distance.