Ultrasonic-assisted underwater wet welding method

Abstract

The invention discloses an ultrasonic-assisted underwater wet welding method which is characterized in that an ultrasonic transducer is sealed in a waterproof shell, the shell is filled with aviation kerosene, the upper end of an ultrasonic amplitude transformer penetrates the waterproof shell and is connected with the lower end of the ultrasonic transducer in a threaded manner, an insulating sleeve penetrates the waterproof shell, is inserted into the waterproof shell from the upper end of the ultrasonic transducer and penetrates the ultrasonic amplitude transformer to reach the lower end face of the amplitude transformer, a conducting rod and a conducting nozzle are mounted in the insulating sleeve, the conducting nozzle is mounted at the lower end of the insulating sleeve and partially extends out of the ultrasonic amplitude transformer, the upper end of the conducting rod extends out of the shell and the insulating sleeve, the lower end of the conducting rod is connected with the conducting nozzle in a threaded manner, the conducting rod and the conducting nozzle are axially provided with welding wire feeding pipes, an ultrasonic power wire penetrates the waterproof shell and is connected with the ultrasonic transducer, a lifting adjustment mechanism is arranged on the conducting rod, and the conducting rod is connected with an underwater welding power supply. Arc blow and arc extinguishing rate is decreased, welding joints are uniformly formed, welding defects are decreased, and the ultrasonic-assisted underwater wet welding method has a quite large application space in the field of underwater welding.

Description

technical field [0001] The invention belongs to the technical field of underwater welding, and in particular relates to an ultrasonic-assisted underwater wet welding method which reduces arc deflection and arc extinguishing rate, and has uniform welding seam formation. Background technique [0002] As a kind of mechanical vibration, ultrasonic wave is also the carrier of energy transmission, and has been widely used in actual production and life. At present, the application of ultrasound in the field of welding is becoming more and more extensive, and a series of new technologies such as ultrasonic plastic welding, ultrasonic metal welding, ultrasonic brazing, arc ultrasonic welding technology, ultrasonic-TIG hybrid welding and ultrasonic-MIG hybrid welding have emerged. [0003] During underwater welding, the arc environment pressure is high, the arc voltage and energy density change, the stability and shape of the arc change significantly, and the spatter and arc extinctio...

AI Technical Summary

Problems solved by technology

During wet welding, the cooling effect of water on the arc aggravates the contraction of the arc, and at the same time may aggravate the deflection of the arc, aggravate the tendency of oxygen embrittlement and oxygen holes, etc. These changes, which are different from land welding, make the underwater welding process more difficult. more complicated

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