SiC纳米介质电火花线切割高速低损加工研究  

Research on high efficiency and low loss machining of WEDM based on SiC nano working fluid medium

作　　者：马秀丽 滕凯[2] 孙涛[2] 张磊[2] MA Xiuli;TENG Kai;SUN Tao;ZHANG Lei(Xuzhou Mechanical and Electrical Technician College,Xuzhou 221131,CHN;Xuzhou Institute of Technology,Xuzhou 221018,CHN)

机构地区：[1]徐州机电技师学院,江苏徐州221131 [2]徐州工程学院,江苏徐州221018

出　　处：《制造技术与机床》2022年第7期65-68,共4页Manufacturing Technology & Machine Tool

基　　金：江苏省高校自然科学研究重大项目(19KJA560007、19KJA140002)。

摘　　要：为了提高电火花线切割速度,改善表面加工质量,降低电极丝损耗,采用SiC纳米介质对Cr12MoV模具钢进行高速走丝线切割加工试验,并且与常规介质的加工效果进行比较。研究表明,在脉冲宽度45μs,脉冲间隔200μs,峰值电流25 A,混粉浓度0.3 g/L的加工条件下,SiC纳米介质较常规介质的切割速度提高22.16%,表面粗糙度降低15.05%,电极丝损耗降低21.87%。纳米微粒的介入,使极间绝缘性降低,放电间隙增大,改善了极间放电条件,提高了加工稳定性和切割速度;也促使极间火花放电通道增多、放电点分散,改善了工件表面加工质量,降低了电极丝损耗。SiC nano-medium is adopted to the HS-WEDM Test of Cr12MoV Die Steel and the machining effects are compared with the conventional medium in order to improve the cutting speed,improve the machining surface quality and reduce the electrode wire loss.The research shows that the cutting speed of SiC nano-medium is increased by 22.16%,the surface roughness of SiC nano-medium is reduced by 15.05%and the reduction of electrode wire of SiC nano-medium is reduced by 21.87%under the processing conditions of pulse width 45μs,pulse interval 200μs,peak current 25 A and mixed powder concentration 0.3 g/L.The intervention of nanoparticles improves the discharge conditions between the electrodes and increases the machining stability and the cutting speed through enlarging discharging-gap.At the same time,the intervention of nanoparticle improves the surface processing quality and reduces the wire electrode wear through increasing the spark discharge channel between the electrodes and dispersing the discharging points.

关 键 词：电火花线切割 SiC纳米微粉 悬浮工作液 表面质量 切割速度 

分 类 号：TG661[金属学及工艺—金属切削加工及机床]