It has been reported that ultrasonic welding using planar vibrations results in higher weld strength and less damage to the work pieces compared with ultrasonic welding using linear vibrations. However, torsional vibration transducers are small and expensive, thus reducing flexibility in the use of the vibration source. Therefore, in this study, we developed an ultrasonic longitudinal-torsional vibration source using longitudinal vibration transducers and a uniform rod with diagonal slits. The proposed vibration source generates torsional vibration by using a uniform rod with diagonal slits instead of a conventional torsional vibration transducer. As a result, it is found that a planar vibration locus is obtained by inputting two resonance frequencies simultaneously.

据报道，与使用线性振动的超声波焊接相比，使用平面振动的超声波焊接导致更高的焊接强度和更少的工件损坏。然而，扭振传感器体积小且价格昂贵，因此降低了使用振动源的灵活性。因此，在本研究中，我们开发了一种使用纵向振动换能器和带有斜缝的均匀杆的超声波纵向扭转振动源。所提出的振动源通过使用带有斜缝的均匀杆代替传统的扭转振动传感器来产生扭转振动。结果，发现通过同时输入两个共振频率获得平面振动轨迹。