微细电火花加工航空油嘴精密流量孔试验研究  

Study on the Precision Flow Hole of Aviation Nozzle by Using Micro-EDM

作　　者：李冀霞 罗金星 柳荣俊 刘丽丹 陈云维 罗斌 LI Jixia;LUO Jinxing;LIU Rongjun;LIU Lidan;CHEN Yunwei;LUO Bin(AECC Guizhou Honglin Aviation Power Control Technology Co.,Ltd.,Guiyang 550009,China;School of Aeronautical Manufacturing and Mechanical Engineering,Nanchang Hangkong University,Nanchang 330063,China;Jiangsu Key Laboratory of Precision and Micro-Manufacturing Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 210016,China)

机构地区：[1]中国航发贵州红林航空动力控制科技有限公司,贵州贵阳550009 [2]南昌航空大学航空制造与机械工程学院,江西南昌330063 [3]南京航空航天大学,江苏省精密与微细制造技术重点实验室,江苏南京210016

出　　处：《电加工与模具》2024年第6期19-24,39,共7页Electromachining & Mould

基　　金：国家自然科学基金项目(52405486);江西省自然科学基金项目(20232BAB214057,20224BAB214054);江苏省精密与微细制造技术重点实验室开放基金项目(JSKL2223K02)。

摘　　要：针对航空发动机油嘴精密流量孔的加工需求,分析了工具电极损耗变化过程,发现工具电极端部在稳定损耗状态下可加工多个微小孔。通过试验研究了开路电压、脉冲宽度、脉冲间隔及进给速度等工艺参数对微小孔加工的影响,得到最优加工工艺参数组合为开路电压70 V、脉冲宽度0.5μs、脉冲间隔3.5μs、进给速度10.0 mm/min。采用优化工艺参数加工出18个平均直径为(0.128±0.002)mm的油嘴零件,孔壁陡直无锥度,表面质量较好,满足精密流量孔的加工要求,验证了微细电火花加工工艺的可行性。According to the processing requirements of precision flow hole of aviation nozzle,the variation of tool-electrode wear was firstly analyzed,which indicated that the tool electrode could machine several micro-holes in its steady wear stage.Moreover,the effects of open-circuit voltage,pulse width,pulse interval and feeding rate on micro-hole drilling were investigated.The optimized machining parameters for micro-hole were obtained:open-circuit voltage of 70 V,pulse width of 0.5μs,pulse interval of 3.5μs,and feeding rate of 10.0 mm/min.Eventually,18 aviation nozzles with an average diameter of(0.128±0.002)mm were fabricated using the optimized machining parameters.And it was found that the machined flow holes were straight and uniform,which can meet its processing requirements,so as to the machining feasibility of micro-EDM had been verified.

关 键 词：微细电火花加工 微小孔 油嘴 精密流量孔 

分 类 号：TG661[金属学及工艺—金属切削加工及机床]