An ultrasonic arc hybrid welding device

Abstract

The invention discloses an ultrasonic electric arc composite welding device which comprises a conducting rod (1), an ultrasonic transducer (2), a first level ultrasonic amplitude transformer (4), a welding nozzle (7), a consumable electrode (10), an ultrasonic power source (13), a water cooling system (14) and a welding power source (15). The device further comprises a second level ultrasonic amplitude transformer (6) and an ultrasonic transmitting terminal (8). The ultrasonic transducer (2) is connected with the first level ultrasonic amplitude transformer (4) connected with the second level ultrasonic amplitude transformer (6). The second level ultrasonic amplitude transformer (6) is connected with the ultrasonic transmitting terminal (8). The lower end of the ultrasonic transmitting terminal (8) is shaped like a horn mouth provided with a plurality of air holes (9). The amplitude transformers of two levels are adopted for ultrasound amplification, the horn-mouth-shaped transmitting terminal is adopted, and therefore the sound radiation capacity is greatly improved, the sound scattering effect is effectively reduced, and the sound radiation efficiency is improved wholly.

Description

technical field [0001] The invention relates to the fields of arc welding and arc smelting, in particular to an ultrasonic arc hybrid welding device. Background technique [0002] Currently, welded structures produced in the world's major industrial countries account for 50-60% of steel production. Among them, arc welding is the most widely used. Arc welding is a smelting connection method that converts gas (such as inert gas argon and nitrogen) into plasma high-enthalpy gas through a welding torch, and uses it as a heat source. In order to expand the application range of arc welding and further improve welding efficiency, many new arc welding methods have emerged. By adjusting the welding heat source to improve the arc characteristics and weld pool morphology under normal specifications, such as high-frequency pulsed argon arc Welding, laser enhanced arc hybrid welding and double tungsten TIG welding, etc. Based on the same concept and in view of the relative advantages ...

AI Technical Summary

Problems solved by technology

However, according to the characteristics of sound propagation, the energy attenuation caused by temperature, smoke and dust during the sound wave propagation process is very severe. How to further improve the sound radiation ability and reduce the sound attenuation is a difficult point in the development of ultrasonic arc hybrid welding equipment.

In the patent application number 201010291292.0, a hybrid welding device of ultrasonic focused sound field and melting electrode arc is disclosed. While the radiation ability is improved, the overall effect of the sound field is ignored, because the radiation end face is smaller, which is more beneficial to small-scale welding. For large-scale welding, insufficient acoustic recovery force will easily lead to unstable arc

In addition, it should be noted that there are certain difficulties in the application of power ultrasound in air. One is the serious mismatch between the acoustic impedance of the ordinary transducer and the gas medium; the other is the rapid attenuation of ultrasound in the gas medium, which to a certain extent It also weakens the arc space sound radiation ability

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