Improvement of machining accuracy in EDCM by enhanced electrochemical reaming based on a non-metallic backing layer

作     者：Chen WANG Yan ZHANG Lei JI Wentao YANG Jingjing WANG Chen WANG;Yan ZHANG;Lei JI;Wentao YANG;Jingjing WANG

作者机构：School of Mechanical and Power EngineeringNanjing Tech UniversityNanjing 211800China 

出 版 物：《Chinese Journal of Aeronautics》 (中国航空学报（英文版）)

年 卷 期：2021年第34卷第12期

页      面：251-264页

核心收录：

学科分类：08[工学] 082503[工学-航空宇航制造工程] 0802[工学-机械工程] 0825[工学-航空宇航科学与技术] 080201[工学-机械制造及其自动化] 

基　　金：supported by the National Natural Science Foundation of China(No.51705239) 

主　　题：Backing layer ECDM Electrochemical reaming Non-metallic 

摘      要：Electrochemical Discharge Machining(ECDM)is potentially applicable for the fabrication of film-cooling ***,It is extremely difficult for the holes to achieve higher precision and machining quality owing to the working liquid diminish in the lateral machining *** this study,a non-metallic backing layer was proposed to overcome the diminish of working liquid,and the electrochemical reaming,as a post-processing method for ECDM,was used to further improve the machining accuracy and quality of the ***,the three-dimensional morphology of the melted pit of a paraffin backing layer was scanned to obtain the geometric ***,simulation analysis and experimental verification of auxiliary flushing by using the non-metallic backing layer were *** machining performance of the holes machined with electrochemical reaming based on non-metallic backing layer was confirmed by the observations of the surface topography of the hole wall and orifice,measurement of the orifice precision,and analysis of the element composition on the surface of the orifice ***,an optimum combination of machining parameters for electrochemical reaming is obtained through a process parameter optimization experiment.