Patent ID: 7448127

Claim:
A tube expander for heat exchangers comprising: a system frame formed with a base, a ceiling, and support columns for connecting back ends of the base and the ceiling; a vertically movable operation plate having a plurality of tube expansion mandrels located between the base and the ceiling; an end plate suspended under the operation plate where the end plate is restricted from descending by contacting a stopper positioned at a vertical position corresponding to the heat exchanger to be set on the base; a pair of first support members that are provided at both right and left ends of the end plate to mount the end plate in such a way that a front side of the end plate is slidably attached to a pair of first guide bars which are formed at a front side of the tube expander; a pair of second support members that are provided at both right and left ends of the end plate to mount the end plate in such a way that a back side of the end plate is slidably attached to a pair of second guide bars which are formed at a back side of the tube expander; and wherein the stopper is designed to contact with an overall bottom surface of the end plate when stopping the end plate and is slidably supported by the first guide bars and the second guide bars and is moved by a stopper up/down means formed close to the support columns; whereby a guide path is established on the base between the first guide bars and the support columns wherein the guide path extends between a right end and a left end of the base for a carrying device to carry the heat exchangers or for installing a transportation device for transferring the heat exchangers.