Design of Longitudinal Torsional Ultrasonic Transducer and Its Performance Test

doi:10.3901/JME.2019.01.139

Abstract

Abstract: The application of longitudinal torsional ultrasonic vibration machining in carbon fiber composite material and other hard brittle materials on more attention. Aiming at the problem that the torsional vibration amplitude is small and the coupling of longitudinal and torsional vibration is poor of the longitudinal-torsional ultrasonic transducers, a new longitudinal-torsional ultrasonic transducer is designed. An exponential type longitudinal vibration ultrasonic transducer with variable cross section is designed by theoretical analysis, then designed helical grooves in the exponential section to make a portion of longitudinal vibration convert to torsional vibration. The influence of structural parameters of helical groove on longitudinal and torsional resonance is analyzed by FEM, so the optimum helical groove parameters are optimized. The modal analysis and transient analysis of the transducer are carried out, the results show that the transducer can realize longitudinal vibration and torsional vibration, and the deviation was small for the resonance frequency between design value with simulation value, and the simulation amplitude value meets the general processing requirements. Finally, impedance analysis and amplitude test of the designed transducer are carried out, the results show that the resonance frequency is smaller than the simulation value, the longitudinal vibration amplitude is 9.4 μm, and the torsional vibration amplitude is 5.3 μm, which can be applied to most ultrasonic machining, and the correctness of the design method is also verified.

Key words: exponential cross section rod, helical groove, longitudinal torsional ultrasonic transducer

CLC Number:

TG502

YUAN Songmei, TANG Zhixiang, WU Qi, SONG Heng. Design of Longitudinal Torsional Ultrasonic Transducer and Its Performance Test[J]. Journal of Mechanical Engineering, 2019, 55(1): 139-148.

References

[1] 冯平法,王健健,张建富,等. 硬脆材料旋转超声加工技术的研究及展望[J]. 机械工程学报,2017,53(19):3-21. FENG Pingfa,WANG Jianjian,ZHANG Jianfu,et al. Research status and future prospects of rotary ultrasonic machining of hard and brittle materials[J]. Journal of Mechanical Engineering,2017,53(19):3-21.
[2] 房善想,赵慧玲,张勤俭. 超声加工技术的应用现状及其发展趋势[J]. 机械工程学报,2017,53(19):22-32. FANG Shanxiang,ZHAO Huiling,ZHANG Qinjian. The application status and development trends of ultrasonic machining technology[J]. Journal of Mechanical Engineering,2017,53(19):22-32.
[3] ASAMI T, MIURA H. Vibrator development for hole machining by ultrasonic longitudinal and torsional vibration[J]. Japanese Journal of Applied Physics,2011,50(7):07HE31-07HE31-9.
[4] KARAFI M R, HOJJAT Y, SASSANI F. A new hybrid longitudinal-torsional magnetostrictive ultrasonic transducer[J]. Smart Materials and Structures,2013, 22(6):065013.
[5] LIN S. Study on the sandwiched longitudinal-torsional ultrasonic transducer[J]. Chinese Journal of Acoustics,1998,17(1):76-84.
[6] LIN S. Study on the longitudinal-torsional composite mode exponential ultrasonic horns[J]. Ultrasonics,1996,34(7):757-762.
[7] 林书玉. 斜槽式纵-扭复合模式压电超声换能器的研究[J]. 声学学报,1999,24(1):59-65. LIN Shuyu. Study on the longitudinal-torsional composite transducer with slanting slots[J]. Acta Acustica,1999,24(1):59-65.
[8] 皮钧. 圆环斜槽传振杆的纵扭振动转换[J]. 机械工程学报,2008,44(5):242-248. PI Jun. Longitudinal-torsional vibration converter of cylinder with multiple diagonal slits[J]. Chinese Journal of Mechanical Engineering,2008,44(5):242-248.
[9] 唐军,赵波. 单激励纵扭复合超声铣削系统研究[J]. 振动与冲击,2015,34(6):57-61. TANG Jun,ZHAO Bo. A new longitudinal-torsional composite ultrasonic milling system with a single excitation[J]. Journal of Vibration and Shock,2015,34(6):57-61.
[10] 唐军,赵波. 一种新型纵扭复合超声振动系统的研究[J]. 机械科学与技术,2015,34(5):742-747. TANG Jun,ZHAO Bo. Study on a new type of longitudinal-torsional composite ultrasonic vibration system[J]. Mechanical Science and Technology for Aerospace Engineering,2015,34(5):742-747.
[11] 尚晓江. ANSYS结构有限元高级分析方法与范例应用[M]. 北京:中国水利水电出版社,2008. SHANG Xiaojiang. ANSYS structure finite element advanced analysis method and example application[M]. Beijing:China Water&Power Press,2008.