Patent ID: 9381562
Filing Date: 2016-07-05
CPC Classification: B21D

Claim Text:
1. A tube expansion device comprising a reference platform to stop a force pressing plate at predetermined position, said force pressing plate freely reciprocating along longitudinal direction of posts provided on a base of said tube expansion device and setting protrusion length of a tube protruded from an end plate by pushing down said end plate of a heat exchanger set at said base, a receiving body placed on said base of which location is between said posts, a rear surface regulating body fixed to said receiving body for receiving a back side of said heat exchanger, and first side regulating bodies that are located at left and right ends of said heat exchanger for holding and positioning said heat exchanger at a tube expansion position, wherein said first side regulating bodies are provided with locking portions engaged with both upper edge and lower edge of said rear surface regulating body to restrict upward and downward movements of said first side regulating bodies, and further said first side regulating bodies are provided in freely attachable and detachable fashion through magnets to said rear surface regulating body.