SiC_(p)/Al复合材料内冲液电火花喷爆加工试验研究  

Experimental Study on Inner Jetted Dielectric in Ejecting-explosion EDM of SiC_(p)/Al Composites

作　　者：刘宇[1] 陈海静 曲嘉伟 刘炜航 张诗奇 马付建[1] 张生芳[1] LIU Yu;CHEN Haijing;QU Jiawei;LIU Weihang;ZHANG Shiqi;MA Fujian;ZHANG Shengfang(School of Mechanical Engineering,Dalian Jiaotong University,Dalian 116028,China)

机构地区：[1]大连交通大学机械工程学院,辽宁大连116028

出　　处：《电加工与模具》2024年第6期13-18,共6页Electromachining & Mould

基　　金：国家自然科学基金面上项目(51875074);辽宁省“兴辽英才计划”项目(XLYC2203059);辽宁省自然科学基金计划面上项目(2022-MS-340)。

摘　　要：在电火花加工小孔时,随着加工深度的增加,电蚀产物排出困难,影响加工效率。因此,设计了电火花喷爆加工下有内冲液和无内冲液的单因素对比试验,分析了内冲液作用下SiC_(p)/Al复合材料电火花喷爆加工冲液压力、电极内径和SiC质量分数对小孔加工性能和表面质量的影响规律。结果表明:在3 MPa冲液压力下,采用内径1.5 mm的管电极加工质量分数55%的SiC_(p)/Al复合材料,较无内冲液加工时,加工效率提高了26.9%,电极相对损耗率降低了29.6%,加工锥度降低了29.2%,表面粗糙度值降低了19.2%。When machining small holes by EDM,as the machining depth increases,the discharge of electrical corrosion products is difficult,which affects the efficiency of machining.Therefore,a single factor comparison process test of internal flushing fluid and non-flushing fluid under ejecting-explosion EDM is designed.The effects of flushing pressure,electrode inner diameter and SiC content on the machining performance and surface quality of small holes in SiC_(p)/Al composites during ejectingexplosion EDM under the action of internal flushing fluid is analyzed.The results show that when machining 55%SiC_(p)/Al composites using tube electrode with inner diameter of 1.5 mm under 3 MPa flushing pressure,compared with non-flushing machining,the machining efficiency is increased by 26.9%,the electrode relative loss rate is reduced by 29.6%,the machining taper is reduced by 29.2%,and the surface roughness is reduced by 19.2%.

关 键 词：SiC_(p)/Al复合材料 电火花喷爆加工 内冲液 工艺规律 

分 类 号：TG661[金属学及工艺—金属切削加工及机床]