| 摘要 |
PROBLEM TO BE SOLVED: To provide a brazing method with which the generations of a part which is not brazed yet and defective brazing resulting from the residue of flux, can be prevented and the generation of the defective brazing resulting from the entrainment of gas, can be prevented in the brazing method brazing a brazing scheduled part by heating the brazing scheduled portion of a base material or a brazing filler material with the heat of a heat source. SOLUTION: As the base materials, two pipes 1, 2 made of an aluminum alloy having circular cross-sections are prepared. Both pipes 1, 2 are fitted together and the vibrator 6a of a ultrasonic vibration oscillator 6 is connected to the pipe 2 on the one side. The fitting part 3 of both pipes 1, 2 are heated up to a brazing temperature with the heat of gas flames 5a. Next, the fitting part 3 is brazed by using a wire shaped brazing filler material 4 containing flux components while subjecting the fitting part 3 to ultrasonic vibrations by operating the oscillator 6.
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