大长宽比深窄槽电解加工阴极结构设计  

Cathode Structure Design of Electrochemical Machining for Deep Narrow Grooves With High Length-Width Ratio

作　　者：吕焱明 赵建社[1] 范延涛[1] 刘鼎铭[1] 杨振文[1] Lü Yanming;ZHAO Jianshe;FAN Yantao;LIU Dingming;YANG Zhenwen(College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics,Nanjing 210016, China)

机构地区：[1]南京航空航天大学机电学院,南京210016

出　　处：《航空制造技术》2018年第3期46-53,共8页Aeronautical Manufacturing Technology

基　　金：研究生创新基地(实验室)开放基金资助项目(kfjj20160504)

摘　　要：为解决钛合金大长宽比深窄槽电解加工过程中阴极结构刚性差的问题,设计了内部带有加强筋的镂空片状阴极结构,并采用单向流固耦合法研究了加强筋数量、加强筋与侧壁夹角对阴极整体刚性的影响规律。仿真结果表明,阴极结构添加3根加强筋时,阴极整体刚性得到显著提高。另外,阴极整体刚性随加强筋与侧壁夹角的增大而降低,综合阴极变形量与最大等效应力,确定了加强筋与侧壁夹角为45°时,阴极结构具有良好的刚性,能够满足试验要求。最后,采用自主研制的试验系统开展了大长宽比深窄槽电解加工工艺试验,选用优化后的阴极结构,可加工出长宽比11∶1、深宽比9∶1的深窄槽结构。In order to solve the issue of the poor rigidity of cathode structure in the electrochemical machining(ECM)of titanium alloy with high length-width ratio,a hollow slice cathode with stiffeners was designed.The effects of the number of stiffeners and the angle between stiffener and sidewall on the overall rigidity of the cathode were studied by one-way fluid coupling analysis method.The simulation results show that the overall rigidity of the cathode is improved remarkably when three stiffeners are added to the cathode structure.In addition,the overall rigidity of the cathode decreases with the increase of the angle between stiffener and sidewall.Comprehensive cathode deformation and the maximum equivalent stress,the angle between stiffener and sidewall is45°,the cathode structure has good rigidity,and can meet the rigid requirements.Finally,adopt self-developed experimental system to implement a ECM process test of deep narrow grooves with high length-width ratio.The optimized cathode structure can be used to process a deep narrow groove with lengthwidth ratio of11∶1and depth-width ratio of9∶1.

关 键 词：电解加工 阴极结构 深窄槽 刚性 钛合金 加工稳定性 

分 类 号：V261[航空宇航科学与技术—航空宇航制造工程]