电火花线切割极间介电特性与放电能量分配关系  

Research of Relationship Between Interelectrode Dielectric Properties and Energy Distribution in Wire Electrical Discharge Machining

作　　者：刘志东[1] 魏为[1] 陆霖琰[1] 徐安阳[1] 

机构地区：[1]南京航空航天大学机电学院,江苏南京210016

出　　处：《上海交通大学学报》2012年第7期1015-1020,共6页Journal of Shanghai Jiaotong University

基　　金：国家自然科学基金研究项目(50975142);江苏省自然科学基金(BK2008393)

摘　　要：建立了电火花线切割极间介质电阻模型,分析了加工能量与极间介质电导率、工件厚度之间的关系,并对极间介质电阻模型进行了实验验证.研究结果表明,随着电导率的升高或者工件厚度的增加,放电期间极间"漏电流"增大,损耗在极间介质的能量增加,加工效率降低,电导率变化导致的极间电阻改变对于加工效率的影响显著.A resistance model of （WEDM） was established. And interelectrode dielectric fluid in wire electrical discharge machining the relationship among machining energy, electrical conductivity and thickness of a workpiece was analyzed. The resistance model of interelectrode dielectric fluid was verified by experiments. The results show that with the higher electrical conductivity or the thickness of work- piece, the larger the interelectrode leakage current is during discharge, the more the energy loss in the in- terelectrode dielectric fluid, the lower the machining efficiency. Cutting efficiency is obviously influenced by the change of the resistance which is due to the change of electrical conductivity.

关 键 词：电火花线切割 工作介质 介电特性 电导率 放电能量 

分 类 号：TG662[金属学及工艺—金属切削加工及机床]