Abstract
A study on ultrasonic vibration-assisted electrical discharge machining (UVEDM) micro-hole, which mainly includes three key designs, was conducted to improve the machining performance of the electric discharge machining (EDM) micro-holes on TC4 titanium alloy. First, a mathematical model for the velocity of the flow field in the interelectrode gap was established. Consequently, the effect of the presence or absence of ultrasonic vibration on the flow velocity was analyzed. Furthermore, based on COMSOL Multiphysics, the two distributions of the flow field and the debris in the interelectrode gap were simulated, and the influence of ultrasonic amplitude on them was analyzed. Finally, the study of UVEDM micro-hole machining with different ultrasonic amplitudes was conducted. The machining performance of the UVEDM micro-hole was found to increase with the increment of the ultrasonic amplitude and the optimal value of 5.22 μm, while the performance decreases when the ultrasonic amplitude goes beyond the optimal value. Compared with EDM micro-hole, the MMR is increased by 2.4 times, and the electrode loss and hole taper are reduced by 56% and 24%, respectively.
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Financial support for this work provided by the National Natural Science Foundation of China (grant no. 51905363), the Natural Science Foundation of Jiangsu Province (grant no. BK20190940 & No. BK20210866), the Natural Science Foundation of the Jiangsu Higher Education Institutions of China (grant no. 19KJB460008 & No. 21KJB460021), the China Postdoctoral Science Foundation (grant no. 2019M661914).
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All the authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Peng Zhang. The first draft of the manuscript was written by Peng Zhang, and all the authors commented on previous versions of the manuscript. All the authors read and approved the final manuscript.
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Zhang, P., Yin, Z., Dai, C. et al. The effect of ultrasonic amplitude on the performance of ultrasonic vibration-assisted EDM micro-hole machining. Int J Adv Manuf Technol 122, 1513–1524 (2022). https://doi.org/10.1007/s00170-022-09852-3
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DOI: https://doi.org/10.1007/s00170-022-09852-3