Evolution of convex structure during counter-rotating electrochemical machining based on kinematic modeling  

作　　者：Wenjian CAO Dengyong WANG Zhiyuan REN Di ZHU 

机构地区：[1]College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China [2]Jiangsu Key Laboratory of Precision and Micro-Manufacturing Technology,Nanjing 210016,China

出　　处：《Chinese Journal of Aeronautics》2021年第3期39-49,共11页中国航空学报（英文版）

基　　金：the financial support provided by National Natural Science Foundation of China(51805259);Natural Science Foundation of Jiangsu Province of China(No.BK20180431);Postdoctoral Science Foundation of China(No.2019M661833);Jiangsu Key Laboratory of Precision and Micro-Manufacturing Technology and Young Elite Scientists Sponsorship Program by CAST。

摘　　要：Counter-rotating electrochemical machining(CRECM)is a novel electrochemical machining(ECM)method,which can be used to machine convex structures with complex shapes on the outer surface of casings.In this study,the evolution of the convex structure during CRECM is studied.The complex motion form of CRECM is replaced by an equivalent kinematic model,in which the movement of the cathode tool is realized by matrix equations.The trajectory of the cathode tool center satisfies the Archimedes spiral equation,and the feed depth in adjacent cycles is a constant.The simulation results show that the variations of five quality indexes for the convex structure:as machining time increases,the height increases linearly,and the width reduces linearly,the fillets at the top and root fit the rational function,and the inclination angle of the convex satisfies the exponential function.The current density distributions with different rotation angles is investigated.Owing to the differential distribution of current density on workpiece surface,the convex is manufactured with the cathode window transferring into and out of the processing area.Experimental results agree very well with the simulation,which indicates that the proposed model is effective for prediction the evolution of the convex structure in CRECM.

关 键 词：Convex structure Counter-rotating electrochemical machining Current density Equivalent kinematic model Material removal 

分 类 号：TG662[金属学及工艺—金属切削加工及机床]