The invention discloses a preparation method of an ultra-thin automobile radiating circular
pipe. The method comprises the following steps that a
solid-state high-frequency
welding power source is used for
welding a
pipe barrel into a circular
pipe with the outer
diameter of 7.0-7.3 mm, the thickness of a wall is 0.20-0.25 mm, and cooling,
slag scraping and
cutting off are carried out to obtain the ultra-thin automobile cooling circular pipe; and the invention further provides an automobile radiator, the heat radiator is composed of the ultra-thin automobile heat dissipation circular pipe, turbulent flow fins, a reinforcing plate, a mounting plate, an upper water chamber, a lower water chamber and an aluminum comb plate. According to the method, a single-layer aluminum
alloy material is adopted to prepare the automobile heat dissipation circular pipe, the material uniformity is good, a high-frequency current with a high-current and large-frequency is adopted for
welding, so that the welding speed is high, the welding efficiency is high, a
melting point of a welding position is consistent, and the anti-
corrosion performance is good; and the wall thickness of the circular pipe is very thin, not exceed 0.25 mm, the heat exchange efficiency is high, the weight is light, a consumable material is saved, and the cost is low.