摘要
电火花加工小孔存在电蚀产物排出效率低导致加工效率低、电蚀产物排除导致二次放电现象影响加工精度等问题,而超声振动在工作液中产生空化效应和泵吸作用,能大幅提高电火花的排屑和消电离能力,进而在很大程度上减少上述问题的发生。设计一套工作液超声振动辅助电火花小孔加工装置,主要包括主轴系统、微三维运动平台、超声振动工作液槽和数据采集系统,其中主轴系统包括NSK电主轴、引电结构、工具电极装夹结构,可以实现工具电极的高速旋转;基于LabVIEW开发了电火花小孔加工控制系统,主要包括初始化模块、粗定位模块、恒电压对刀模块、实时电压分段控制加工模块和实时显示模块。开展了工作液超声振动辅助电火花小孔加工试验研究,试验结果表明:随电火花加工电压的增加,工件材料去除率和电极损耗率都趋于增大。
Electrical discharge machining(EDM)keyhole exists some problems such as low machining efficiency due to low discharge efficiency of electro erosion products,secondary discharge phenomenon due to discharge of electro erosion products and influence on machining accuracy.The cavitation effect and pumping effect generated by ultrasonic vibration in the working fluid can greatly improve the chip discharge and deionization ability of EDM,thus the occurrence of the above problems is reduced to a large extent.A set of working fluid ultrasonic vibration assisted EDM keyhole machining device was designed,which mainly included spindle system,micro-three-dimensional motion platform,ultrasonic vibration working liquid groove and data acquisition system.The spindle system included NSK electric spindle,power transmission structure and tool electrode clamping structure,which could realize high-speed rotation of tool electrode.The EDM keyhole machining control system was developed based on LabVIEW,which included initialization module,rough positioning module,constant voltage tool setting module,real-time voltage subsection control machining module and real-time display module.The experimental study of working fluid ultrasonic vibration assisted EDM was carried out.The experimental results show that the material removal rate and electrode loss rate tend to increase with the increase of EDM voltage.
作者
连海山
徐达华
陈小军
丁梓瀚
张林鹏
LIAN Haishan;XU Dahua;CHEN Xiaojun;DING Zihan;ZHANG Linpeng(School of Electromechanical Engineering,Lingnan Normal University,Zhanjiang Guangdong 524048,China;School of Electromechanical Engineering,Guangdong University of Technology,Guangzhou Guangdong 510006,China)
出处
《机床与液压》
北大核心
2023年第11期127-132,共6页
Machine Tool & Hydraulics
基金
广东省自然科学基金面上项目(2020A1515011164
2022A1515011108)
国家自然科学基金青年基金项目(52005239)
广东省普通高校特色创新类项目(2021KTSCX068)
广东省科技专项资金(“大专项+任务清单”)竞争性分配项目(2021A05232
2021A05235)。
关键词
工作液超声振动辅助电火花加工
小孔加工
材料去除率
电极损耗率
Working fluid ultrasonic vibration assisted electrical discharge machining
Keyholes machining
Material removal rate
Electrode loss rate
