CAJ | 학술논문

本文基于场致发射电子对阳极表面材的料溅射能量分析，研究了引起正极性电火花加工时阳极材料的损耗机理，并给出了正极性加工时电极损耗率的理论极大值与极小值方程。设计并进行了不同工艺参数下紫铜电极和A3＃钢电极单孔电火花加工对比实验，实验表明：相同工艺参数下，紫铜电极比A3＃钢电极加工时的极间放电能量大，加工效率对比上前者是后者的极的75倍多，但电极材料的损耗率对比上，前者是后者的近10倍；不同工艺参数下，极间有效放电时间和放电能量越大，加工效率越高，相应的电极的损耗率也增加，但损耗率的增加程度要远小于加工效率的提高程度。
본문기우장치발사전자대양겁표면재적료천사능량분석，연구료인기정겁성전화화가공시양겁재료적손모궤리，병급출료정겁성가공시전겁손모솔적이론겁대치여겁소치방정。설계병진행료불동공예삼수하자동전겁화A3＃강전겁단공전화화가공대비실험，실험표명：상동공예삼수하，자동전겁비A3＃강전겁가공시적겁간방전능량대，가공효솔대비상전자시후자적겁적75배다，단전겁재료적손모솔대비상，전자시후자적근10배；불동공예삼수하，겁간유효방전시간화방전능량월대，가공효솔월고，상응적전겁적손모솔야증가，단손모솔적증가정도요원소우가공효솔적제고정도。
Through the sputtering power analysis of field-emission electrons which hit on the end surface of positive electrode in single discharging pulse,the material wear mechanism of positive electrical discharging machining(short in EDM)process was studied,and theoretical prediction equations of maximum and minimum material wear ratio of electrodes were deduced too .A series of single-hole EDM experiments were designed and the experimental results show that,the mean discharging power produced by the electrode of copper is nearly 75 times higher than that of A3#steel when the other processing parameters are the same,and materi-al wear ratio of the former is almost 10 times than that of the latter;both the machining efficiency and the material wear ratio of electrode increase with the improvement of valid work time and the pulse discharging power,and the increasing degree of machining efficiency is more significant than that of the material wear ratio of tool electrode .