Simulation and Experimental Study on Improving Electrochemical Machining Stability of Highly Convex Structures on Casing Surfaces Using Backwater Pressure  

作　　者：Zhenghui Ge Wangwang Chen Yongwei Zhu 

机构地区：[1]College of Mechanical Engineering,Yangzhou University,Yangzhou 225000,China

出　　处：《Chinese Journal of Mechanical Engineering》2022年第4期152-158,共7页中国机械工程学报（英文版）

基　　金：Supported by National Natural Science Foundation of China(Grant No.51775484);China Postdoctoral Science Foundation(Grant No.2020M670791).

摘　　要：Casing parts are regarded as key components of aero-engines.Most casing parts are attached to convex structures of diferent shapes,whose heights range from hundreds of microns to tens of millimeters.Using profling blocky electrodes for electrochemical machining(ECM)of casing parts is a commonly adopted method,especially when highly convex structures.However,with an increase in the convex structure height,the fow felds of the machining areas become more complex,and short circuits may occur at any time.In this study,a method to improve the fow feld characteristics within a machining area by adjusting the backwater pressure is proposed and validated through simulation and experiment analyses.The simulation results demonstrated that the back-pressure method can signifcantly improve the uniformity of the fow feld around the convex structure compared with the extraction and open outlet modes.Subsequently,the back-pressure value was optimized at 0.5 MPa according to the simulation results.The experimental results showed that using the optimized back-pressure parameters,the cathode feed-rate increased from 0.6 to 0.7 mm/min,and a 16.1 mm tall convex structure was successfully machined.This indicates that the back-pressure method is suitable and efective for electrochemical machining of highly convex structures with blocky electrodes.In this study,we propose a method to improve the electrochemical machining stability of a convex structure on a casing surface using backwater pressure,which has achieved remarkable results.

关 键 词：Casing parts Electrochemical machining Convex structures Back-pressure method Blocky electrode 

分 类 号：V263[航空宇航科学与技术—航空宇航制造工程] TG662[金属学及工艺—金属切削加工及机床]