Characteristics of the longitudinal-torsional vibration of an ultrasonic horn with slanting slots

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (10) : 58-64.

ZHANG Qiaoli1,ZHANG Jianfu1,FENG Pingfa1,2,YU Dingwen1,WU Zhijun1

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Abstract

Ultrasonic horn with slanting slots can convert its motion mode from longitudinal vibration to torsional vibration, however, the conversion efficiency depends on the structure design.In order to improve the conversion efficiency, the reflection factors of longitudinal wave and transverse wave were derived under different incident angles and the effects of structural parameters of slanting slots on the conversion efficiency were analyzed by using the finite element method.The analysis results show that there are an optimum angle and width of the slanting slots to get the biggest conversion efficiency, the optimum value of the slanting slots’ width decreases with the increasing of the number of the slanting slots, the conversion efficiency increases with the increasing of the depth or length of the slanting slots but gets steady when the length reaches a certain value.At last, an optimized ultrasonic horn with slanting slots was designed to validate the effectiveness of the simulation results.The measured longitudinal amplitude and torsional amplitude of the ultrasonic horn are 9.5 μm and 29 μm respectively.

Key words

ultrasonic vibration / longitudinal-torsional / slanting slots / optimization design

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ZHANG Qiaoli1,ZHANG Jianfu1,FENG Pingfa1,2,YU Dingwen1,WU Zhijun1. Characteristics of the longitudinal-torsional vibration of an ultrasonic horn with slanting slots[J]. Journal of Vibration and Shock, 2019, 38(10): 58-64

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