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An electrochemical machining method for aeroengine blades based on four-directional synchronous feeding of cathode tools

查看全文 作　　者：Jia [1]LIU;Libing [1]HUI;Dongqian [1]JIA;Yan [1]LIU;Di [1]ZHU 高影响力作者 机构地区：[1]College of Mechanical and Electrical Engineering,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China高影响力机构 出　　处：《Chinese Journal of Aeronautics》索引2023年第36卷第9期,共12页高影响力期刊 基　　金：supported by the National Natural Science Foundation of China(Grant 52075253);the National Science and Technology Major Project(Grant 2017-VII-0004-0097). 摘　　要：Blades are critical components of modern aero-engine.Among the many characteristic structures of the blade,the leading/trailing edges are key structures that have the greatest influence on the aerodynamic effect and power conversion of the blade.Electrochemical machining(ECM)is regarded as one of the most important techniques in blade manufacturing due to its process characteristics of high material removal rates,virtually no tool wear,and no areas of thermal or mechanical damage to the workpiece rim zones.Herein,an ECM method based on the fourdirectional synchronous feeding of four cathode tools is proposed to improve the machining accuracy of the leading and trailing edges of the blade.During blade ECM using this method,four cathode tools feed toward the basin/back surfaces and leading/trailing edges respectively.The dynamic processing simulation and flow field simulation results of the ECM process show that the proposed method eliminates the sharp changes in the electric field and electrolyte flow field at the leading and trailing edges seen in traditional machining methods.Thus,the electric field and flow field stability of the leading and trailing edges at the final stage of machining is greatly improved.Experimental comparison of the conventional and proposed ECM methods showed that four-directional synchronous feeding results in improved profile accuracy over repeated machining processes and good surface quality. 关 键 词：AERO-ENGINE BLADE Dynamic simulation Electrochemical machining Experiment
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