首页|Design and analysis of longitudinal-flexural hybrid transducer for ultrasonic peen forming

Design and analysis of longitudinal-flexural hybrid transducer for ultrasonic peen forming

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Ultrasonic peen forming(UPF)is an emerging technology that exhibits great superiority in both its flexible operating modes and the deep residual stress that it produces compared with conventional plastic forming methods.Although ultrasonic transducers with longitudinal vibration have been widely studied,they have seldom been incorporated into UPF devices for machining in confined spaces.To meet the requirements of this type of machining,a sandwich-type piezoelectric transducer with coupled longitudinal-flexural vibrational modes is pro-posed.The basic structure of the transducer is designed to obtain large vibrational amplitudes in both modes.Experimental results obtained with a prototype device demonstrate the feasibility of the proposed transducer.The measured vibrational amplitude for the working face in the longitudinal vibrational mode is 1.0 μm,and electrical matching increases this amplitude by 40％.The flexural vibration characteristics of the same prototype transducer are also tested and are found to be slightly smaller than those of longitudinal mode.The resultant work-ing strokes of the UPF impact pins reach 1.7 mm and 1.2 mm in the longitudinal and flexural modes,respectively.The forming capability of the prototype has been evaluated via 15-min machining on standard 2024-T351 aluminum plates.After UPF,an improved surface mor-phology with lower surface roughness is obtained.The aluminum plate test piece has an apparent upper deformation with an arc height of 0.64 mm.The measured peak value of the compressive residual stress is around 250 MPa,appearing at a depth of 100 μm.The proposed longitudinal-flexural hybrid transducer thus provides a high-performance tool for plate peen forming in confined spaces.

Ultrasonic peen formingPiezoelectric transducerLongitudinal-flexural vibrational modeModal analysis

Wuqin Li、Yongyong Zhu、Xiaolong Lu、Huafeng Li、Ying Wei、Pengwei Shang、Bo Feng

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State Key Laboratory of Mechanics and Control for Aerospace Structures,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China

Institute of Dynamics and Vibration Research,Leibniz Universität Hannover,An der Universität l,Garbsen 30823,Germany

National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaQing Lan Project,the Research Fund of the State Key Laboratory of Mechanics and Control of Mechanical Structures(Nanjing UniBiomedical Engineering Fusion Laboratory of the affiliated Jiangning Hospital of Nanjing Medical UniversityPostgraduate Research & Practice Innovation Program of NUAAPostgraduate Research & Practice Innovation Program of NUAAPostgraduate Research& Practice Innovation Program of Jiangsu Province

5197527852277055MCMS-I-0321G01JNYYZXKY202217xcxjh20220114xcxjh20220111KYCX23_0353

2023

10.1063/10.0020345

纳米技术与精密工程(英文)
中国微米纳米技术学会,天津大学

纳米技术与精密工程(英文)

CSTPCDCSCDEI
影响因子：0.476
ISSN：1672-6030
年,卷(期)：2023.6(4)
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