Method and auxiliary device for manufacturing heat exchanger with heat exchange pipe exposed

The invention discloses a method and an auxiliary device for manufacturing a heat exchanger with a heat exchange pipe exposed. The auxiliary device comprises a pipe bundle supporting frame, a temporary shell device and a hoisting device, wherein the pipe bundle supporting frame is used for supporting and assembling a pipe bundle assembly 22, so that all pipe bundle supporting plates of the pipe bundle assembly 22 can be corrected conveniently, and pipe orifices can be aligned conveniently; the temporary shell device realizes automatic welding of a pipe plate 21 and a head girth, thus forming a closed space on the shell side of the pipe bundle assembly to conduct an air tightness test for verifying the weld quality between the heat exchange pipe and the pipe plate; therefore, long-term storage of a heat exchange pipe bundle can be realized, and the cleaning requirement in the process of manufacturing the heat exchanger with the heat exchange pipe exposed is guaranteed; the hoisting device assists in hoisting t