Experimental investigation of rotary sinking electrochemical discharge milling with high-conductivity salt solution and non-pulsed direct current  

作　　者：Xiaokang YUE Yuehong MA Ningsong QU Hansong LI 

机构地区：[1]College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China

出　　处：《Chinese Journal of Aeronautics》2023年第2期388-401,共14页中国航空学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.91860208);the National Natural Science Foundation of China for Creative Research Groups(No.51921003);the Postgraduate Research&Practice Innovation Program of Jiangsu Province(No.KYCX18_0255)。

摘　　要：Electrochemical milling is a modified technique of traditional electrochemical machining(ECM)that can be used to manufacture some helicopter transmission system parts.The use of rotary tools and an inner-jet electrolyte supply pattern can greatly improve the material removal rate(MRR)in a single pass.However,the feed speed is generally limited to minimize the tool wear.To increase the MRR,electrical discharge machining(EDM)is introduced into the electrochemical milling process.The tool rotation is employed to interrupt the discharge and the high-conductivity salt solution and non-pulsed direct current power supply are also adopted to increase ECM,eventually,a new machining method is proposed,which can be called rotary sinking electrochemical discharge milling(RSECD milling).The mechanism of it is explored in this study by analyzing the machined current,MRR,surface morphology,and tool wear at different applied voltages and feed speeds.Besides,the RSECD milling using the tool with a larger diameter is also conducted to further verify the effectiveness.In particular,the MRR can be increased by 742.5%when using the tool with a diameter of 20 mm at the applied voltage of 20 V.

关 键 词：Electrochemical discharge machining Electrochemical milling High-conductivity salt solution Material removal rate Rotary tool 

分 类 号：V2[航空宇航科学技术]