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摘要
Ultrasonic wave-assisted gas metal arc welding (U-GMAW) is a newly developed welding method. Under the action of the ultrasonic wave, the characteristics of the welding arc make an obvious change. Compared with the conventional GMAW arc, the U-GMAW arc is more contracted and becomes brighter, and its length is decreased. The arc length varies wavelike with the height of the ultrasonic radiator. The reason is that the amplitude of the stationary ultrasonic wave pressure varies with the phase difference between the incident wave and the reflected wave. Under the same conditions, the ultrasonic energy and the contraction degree of the arc are enhanced with the increase in the diameter of the ultrasonic radiator and the ultrasonic vibration amplitude. In addition, the arc length in both GMAW and U-GMAW increases with increasing voltage. But at the same voltage, the arc length in U-GMAW is shorter than with GMAW, and the difference increases with the increasing voltage. For U-GMAW, the unit increase in arc length with increased voltage is only about one-third that of conventional GMAW.
- 出版日期2013-12
- 单位哈尔滨工业大学
