HEAT TRANSFER PIPE EXPANDING DEVICE AND HEAT TRANSFER PIPE EXPANDING METHOD

摘要

A heat transfer tube fixing apparatus (103) of a heat transfer tube expansion apparatus (1) has grasping sections (37a) and a moving section (32). The grasping sections (37a) grasp one axial direction end sections (203a) of a plurality of heat transfer tubes (203) in a state where the heat transfer tubes (203) are inserted in in a plurality of heat transfer fins (202). The moving section (32) switches between a first state of covering the surroundings of the grasping sections (37a) and a second state of not covering the surroundings of the grasping sections (37a) by moving in the axial direction of the heat transfer tubes (203). Then, the grasping sections (37a) fix the heat transfer tubes (203) so as not to move in the axial direction and the heat transfer fins (202) and the heat transfer tubes (203) are fixed by the heat transfer tubes (203) expanding in a state where the moving section (32) is in the first state.