Expansion tube welding positioning device of heat exchanger

The invention discloses an expanded tube welding positioning device of a heat exchanger, and belongs to the technical field of heat exchanger expanded tubes. The expanded tube welding positioning device of the heat exchanger comprises a positioning device main body and a push rod, one end of the positioning device main body is provided with a slot for inserting the push rod; the positioning device main body is sleeved with the push rod; the push rod is provided with a smooth section and a threaded section; a positioning assembly is arranged at the end, away from the inserting groove, of the positioning device body to fix the position of the heat exchange pipe. The inserting groove is formed in the positioning device main body, so that the push rod enters the positioning device main body through the inserting groove, the positioning assembly is pushed to fix the heat exchange pipe, and the situation that the welding precision does not reach the standard or welding fails due to manual holding of the pipe fittin