A Study of Mode-converting Ultrasonic Torsion Welding Vibrator

Yao Zhen; Jian Xiao-long; Zeng Le-chen

doi:10.12052/gdutxb.230154

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A Study of Mode-converting Ultrasonic Torsion Welding Vibrator

更新时间：2026-05-27

- A Study of Mode-converting Ultrasonic Torsion Welding Vibrator
- Vol. 41, Issue 5, Pages: 105-110(2024)
- 作者机构：
  
  广东工业大学机电工程学院,广东,广州,510006
- 作者简介：
- 基金信息：
- DOI：10.12052/gdutxb.230154
  CLC： TH16;TH164
- Published：2024
- 稿件说明：
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姚震, 简小龙, 曾乐宸. 模式转换型超声扭转焊接振子的研究[J]. 广东工业大学学报, 2024, 41(5): 105-110.

Yao Zhen, Jian Xiao-long, Zeng Le-chen. A Study of Mode-converting Ultrasonic Torsion Welding Vibrator[J]. 2024, 41(5): 105-110.
姚震, 简小龙, 曾乐宸. 模式转换型超声扭转焊接振子的研究[J]. 广东工业大学学报, 2024, 41(5): 105-110. DOI： 10.12052/gdutxb.230154.

Yao Zhen, Jian Xiao-long, Zeng Le-chen. A Study of Mode-converting Ultrasonic Torsion Welding Vibrator[J]. 2024, 41(5): 105-110. DOI： 10.12052/gdutxb.230154.

摘要

基于超声振动的模式转换理论，结合有限元方法设计了谐振频率为20 kHz的超声扭转焊接振子。该振子主要由夹心式压电换能器与模式转换变幅杆组成，模式转换变幅杆的互推杆和传振杆通过螺栓连接。为减少振子的漏波，设计了一种特殊结构的减振型法兰，并保证模式转换变幅杆输出端产生扭转振动。利用有限元分析软件进行模态分析和谐响应分析，仿真出振子的扭转频率为19.877 kHz，得到振子的频率响应曲线，通过模式转换变幅杆处完成振动模式的转换。最后，通过阻抗分析仪测得研制的振子谐振频率为19.69 kHz，与理论值和仿真值相差较小。激光测振仪测量振子互推杆端面处的纵向振幅为10.2 μm，与仿真值接近，验证了设计方法的可行性，可为设计其他超声扭转焊接振子提供参考。

Abstract

Based on the mode conversion theory of ultrasonic vibration

an ultrasonic torsion welding vibrator with a resonance frequency of 20 kHz is designed by combining the finite element method. The vibrator mainly consists of sandwich-type piezoelectric transducers and a mode conversion horn

with the mode conversion horn's mutual push rod and the vibration-transmitting rod connected by bolts. In order to reduce the leakage wave of the vibrator

a special structure vibration-dampening flange is designed to ensure torsional vibration at the output end of the mode conversion horn. The finite element analysis software is used for modal analysis and harmonic analysis. The torsional frequency of the simulated vibrator is 19.877 kHz

and the frequency response curve of the vibrator is obtained. The vibration mode conversion is completed at the mode conversion horn. Finally

the resonant frequency of the developed vibrator is 19.69 kHz measured by the impedance analyzer

which is less different from the theoretical value and simulation value. The longitudinal amplitude measured by the laser vibrometer at the end face of the mutual push rod of the vibrator is 10.2 μm

which is close to the simulation value. The feasibility of the design method is verified

and it can provide a reference for the design of other ultrasonic torsional welding vibrators.

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references

YIN S, ZHAO B, LI Y. Design of a mode conversion type longitudinal-torsional composite ultrasonic vibration machining system [J]. Journal of Vibration and Shock, 2019, 38(11): 242-248.

LIU Y Y, LIU P, CHEN X H, et al . Design and finite element analysis of sandwich transducer for ultrasonic scalpel[J ] Nonferrous Metal Materials and Engineering, 2022, 43(3) : 17-22.

WU H Q, GAO Z Q. The design of multiple diagonal slits ultrasonic horn with single-excitation longitudinal-torsional vibration [J]. Journal of Applied Acoustics, 2022, 41(4): 620-625.

ZHAO B, BIE W B, WANG X B, et al . Design and experimental investigation on longitudinal-torsional composite horn considering the incident angle of ultrasonic wave [J ] . The International Journal of Advanced Manufacturing Technology, 2019, 105(1-4): 325-341.

林书玉, 张福成. 大尺寸夹心式压电超声换能器的设计[J]. 应用声学, 1994(3): 30-33.

ZHANG D L, LI X H, GUO C, et al . Research on the influence of material and geometry on the natural frequency of the horn [J ] . Machinery Design Manufacture, 2023(6): 197-201.

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张若愚. 用于旋转超声加工的半波谐振超声振子设计及实验研究[D]. 杭州: 浙江大学, 2020.

FU Y, CHEN Y, ZHANG W M. Design and optimization of sandwich piezoelectric transducer based on COMSOL Multiphysics [J]. Light Industry Machinery, 2018, 36(5): 1-8.

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