Design and experimental investigation on vibration system of longitudinal-torsional ultrasonic drilling TC4 titanium alloy

ZHAO Bo; BIE Wenbo; WANG Xiaobo; CHANG Baoqi

doi:10.7527/S1000-6893.2019.23207

ACTA AERONAUTICAET ASTRONAUTICA SINICA >

2020 , Vol. 41 >Issue 1: 423207 - 423207

DOI: https://doi.org/10.7527/S1000-6893.2019.23207

Material Engineering and Mechanical Manufacturing

Design and experimental investigation on vibration system of longitudinal-torsional ultrasonic drilling TC4 titanium alloy

ZHAO Bo ,
BIE Wenbo ,
WANG Xiaobo ,
CHANG Baoqi

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School of Mechanical and Power Engineering, Henan Polytechnic University, Jiaozuo 454003, China

Received date: 2019-06-10

Revised date: 2019-07-01

Online published: 2019-10-11

Supported by

National Natural Science Foundation of China (U1604255, 51475148)

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Abstract

The composite horn with helical slots can make the ultrasonic vibration convert and it has the advantages of simple structure and feasible operation for single excitement in longitudinal-torsional composite vibration. Based on the elastic wave-field theory, the reason of mode-conversion and the characteristics of vibration in composite horn were analyzed. The effects of incident angle on vibration mode are also analyzed. The helical slots are made in conical section of the composite horn and the finite element analysis of 3D model was erected. An experiment was carried out to verify the analysis. The results show that the ultrasonic incident angle had significant influence on the amplitude ratio of torsional vibration to the longitudinal vibration. The torsional vibration and longitudinal vibration changes obviously at the output of the horn when the incident angle was 46.5° and 67.2°, and the measured amplitude ratio of torsional vibration to the longitudinal vibration in the former is improved by 5.1 times than that in the latter. Compared with conventional drilling, the average drilling force in ultrasonic vibration drilling is lower at different incidence angles. Simultaneously, the average drilling force at the incident angle of 46.5° is reduced by 46% than that under the angle of 67.2°, and the machined effect of hole is better. The results provide theoretical and experimental basis for the design of the longitudinal-torsional horn.

Key words： ultrasonic vibration; longitudinal-torsional composite vibration; helical slots; incident angle; finite element analysis; elastic wave-field theory

Cite this article

ZHAO Bo , BIE Wenbo , WANG Xiaobo , CHANG Baoqi . Design and experimental investigation on vibration system of longitudinal-torsional ultrasonic drilling TC4 titanium alloy[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2020 , 41(1) : 423207 -423207 . DOI: 10.7527/S1000-6893.2019.23207

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