Analysis of breakdown property of the composite machining method of abrasive jet and electrical discharge

International Conference on Manufacturing Technology, Materials and Chemical Engineering

机械制造;材料科学;化学工业

Bai, Xue^1 ; Yang, Tingyi^1 ; Hou, Rongguo^1 ; Meng, Jianbing^1 ; Mao, Xinran^1

School of Mechanical Engineering, Shandong University of Technology, Zibo

255000, China^1

关键词: Breakdown characteristics;    Breakdown property;    Dielectric strengths;    Electrical discharge machining;    Electrical discharges;    Machining efficiency;    Spherical coordinates;    Stable characteristics;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/392/6/062036/pdf
DOI  :  10.1088/1757-899X/392/6/062036

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

To improve the machining quality and machining efficiency, the abrasive jet flow is used to replace the conventional electrical discharge dielectric medium, and then the composite machining method of abrasive jet and electrical discharge is proposed. The experimental setup and machining principle of the composite machining method is illustrated. The breakdown property is analysed using the Laplace's equation and its solution equation of the Gauss's law in the differential form in the spherical coordinates. The ability limitation of the dispersion phase to weaken the dielectric strength of the electrical discharge machining fluid and the water are calculated, respectively. The conductive abrasive, the air and the Al2O3 non-conductive abrasive could weaken the dielectric strength of the electrical discharge machining fluid to 0.33 times, 0.83 times and 0.55 times, respectively. They could weaken the dielectric strength of the water to 0.33 times, 0.67 times and 0.69 times, respectively. The breakdown characteristics of different dielectric medium used in the composite machining method are analysed based on the calculating results. The water-air-Al2O3 non-conductive abrasive is the working medium with the stable characteristic. The conductive abrasive-air-electrical discharge machining fluid is the working medium with the controllable characteristic.