Study on Gap Flow Field Simulation in Small Hole Machining of Ultrasonic Assisted EDM

3rd International Conference on Mechanical Engineering and Automation Science

机械制造;无线电电子学

Liu, Yu^1 ; Chang, Hao^1 ; Zhang, Wenchao^1 ; Ma, Fujian^1 ; Sha, Zhihua^1 ; Zhang, Shengfang^1

School of Mechanical Engineering, Dalian Jiaotong University, Dalian, China

116028, China^1

关键词: High aspect ratio;    Machining Accuracy;    Machining efficiency;    Machining gap;    Machining Process;    Research results;    Ultrasonic assisted EDM;    Ultrasonic vibration;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/280/1/012009/pdf
DOI  :  10.1088/1757-899X/280/1/012009

来源: IOP

【 摘 要 】

When machining a small hole with high aspect ratio in EDM, it is hard for the flushing liquid entering the bottom gap and the debris could hardly be removed, which results in the accumulation of debris and affects the machining efficiency and machining accuracy. The assisted ultrasonic vibration can improve the removal of debris in the gap. Based on dynamics simulation software Fluent, a 3D model of debris movement in the gap flow field of EDM small hole machining assisted with side flushing and ultrasonic vibration is established in this paper. When depth to ratio is 3, the laws of different amplitudes and frequencies on debris distribution and removal are quantitatively analysed. The research results show that periodic ultrasonic vibration can promote the movement of debris, which is beneficial to the removal of debris in the machining gap. Compared to traditional small hole machining in EDM, the debris in the machining gap is greatly reduced, which ensures the stability of machining process and improves the machining efficiency.