为深入研究短电弧加工(short electric arc machining,SEAM)中单脉冲放电电弧及凹坑形成过程,文章通过高速摄像机和多通道数据采集设备分别对纯钨与紫铜电极单脉冲放电电弧观测与波形进行采集,结合电极表面形貌与凹坑微观形貌分析凹坑形成特点与材料去除机理.研究发现,在低能量放电过程中,紫铜电极电弧绕着电极旋转使体积增大,纯钨电极比紫铜电极电弧更稳定;在高能量放电过程中,电极阴极区两端的电弧紫铜电极凸起,纯钨电极收缩.工具电极金属蒸汽的产生,一方面提高了放电电弧稳定性,另一方面增大了凹坑尺寸;纯钨电极放电能量相比紫铜电极两端更对称.
Study on the formation process of arc and cratering with electrode materials
To delve into the formation process of single-pulse discharge arcs and craters in short electric arc machining(SEAM),observations and waveform acquisitions of single-pulse discharge arcs on pure tungsten and purple copper electrodes were conducted using high-speed cameras and multi-channel data acquisition devices.The characteristics of crater formation and material removal mechanisms were analyzed by combining electrode surface morphology with crater micro-topography.The study revealed that during the low-energy discharge,the arc around the purple copper electrode rotates with volume expansion,and the arc on the pure tungsten electrode is more stable compared to that on the purple copper electrode.During the high-energy discharge,the arc on the purple copper electrode protrudes at both ends of the cathode region,while the pure tungsten electrode contracts.The metal vapor was generated in the tool electrode,resulting in enhancing the stability of discharge arcs on one hand and increasing the crater size on the other hand.The discharge energy on the pure tungsten electrode is more symmetrical compared to that on the purple copper electrode.
SEAMsingle pulse dischargeelectrode materialselectric arc and cratermetal vapor
万方数据
维普
