中文摘要：

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．

英文摘要：

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.