高速旋转电化学放电钻削材料去除机理试验研究  

Experimental Investigation of Material Removal Mechanism for High-speed Rotation Electrochemical Discharge Drilling

作　　者：史先春 黄绍服[1] 李君[1] 王龙[1] Shi Xianchun;Huang Shaofu;Li Jun;Wang Long(School of Mechanical Engineering, Anhui University of Science and Technology, Anhui Huainan 232001, China)

机构地区：[1]安徽理工大学机械工程学院,安徽淮南232001

出　　处：《机械科学与技术》2020年第7期1053-1059,共7页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家自然科学基金项目(51705002);安徽省自然科学基金项目(1508085QE94)资助。

摘　　要：为了研究电化学放电钻削工艺中的材料去除机理,采用高速旋转的碳化钨螺旋工具电极对ANSI 304型不锈钢工件进行了一系列试验研究,并使用高速摄像机观察加工过程中气泡的产生、气膜的形成和电火花放电现象。通过分析加工电流的信号波形和不同转速下的电火花放电现象,从而进一步揭示了电化学放电加工中的材料去除机理。结果表明:当工具电极较高速旋转时,工件材料是通过EDM和ECM的协同作用被蚀除;当工具电极转速极低或静止时,工件材料是通过ECM被蚀除。To study the material removal mechanism in the electrochemical discharge drilling(ECDD)process,a series of experimental investigation for ANSI 304 stainless steel work-pieces were carried out with a high-speed rotating tungsten carbide helical tool-electrode,and high-speed camera was used to observe the bubbles generation,the gas film formation and the electric spark discharge phenomenon in the drilling process.The material removal mechanism in the electrochemical discharge drilling is further revealed by analyzing the signal waveform of the drilling current and the spark discharge phenomena at different rotational speed.The experimental results show that at the high rotational speed of tool-electrode,the material of work-piece is mainly eroded via the combination of the electrical discharge machining(EDM)and the electrochemical machining(ECM);at the extremely lower or stationary rotational speed of tool-electrode,the material of work-piece is merely etched via ECM.

关 键 词：电化学放电钻削 气泡 气膜 加工电流 电火花放电现象 材料去除机理 

分 类 号：TG662[金属学及工艺—金属切削加工及机床]