Tube expander for heat exchanger

A tube expander for tubes used for a heat exchanger, comprising:

• a support column formed on a base;
• a stripper plate having strippers which contacts an end plate of the heat exchanger and presses down the end plate for defining a projection length of heat exchanger tubes which are projected from the end plate, the stripper plate being reciprocally movable along a longitudinal direction of the support column;
• and
• a reference stand slidably connected to the stripper plate and reciprocally movable along the support column for stopping the stripper plate at a predetermined position;
• wherein a part of the reference stand is slidably attached to a guide bar formed opposite to the support column through a slide unit;
• and
• wherein a slide body formed between the guide bar and the slide unit located at the guide bar opposite to the support column through a fastening means to slide the reference stand along the guide bar, thereby enabling to quickly replace only the slide body by operating the fastening means and moving away the slide body along the guide bar and separating the slide body from the guide bar without removing the reference stand.