Brazing method for joint-free rotary target

The invention relates to a brazing method for a joint-free rotary target. The method particularly comprises the steps that brazing materials are subjected to high frequency oscillation to enter the inner surface of a target pipe and the outer surface of a back pipe through an ultrasonic welding head; the target pipe and the back pipe are mounted on a positioning base, and then a brazing filler metal disc is connected to the upper end of the target pipe; an assembled brazing device is placed in an electric heating constant-temperature blasting drying oven, a temperature control heating curve isset through a temperature controller, and after the heat preservation time is reached, the brazing device is naturally cooled to room temperature; and the whole set of device is cooled to room temperature, residual brazing materials on the brazing filler metal disc are removed through a scraper, the brazing filler metal disc and the positioning base are demounted, and the brazed rotary target isobtained. According to the