高速电弧放电加工放电过程研究  

Study on Discharge Process of Blasting Erosion Arc Machining

作　　者：张发旺[1] 王春亮[1] 顾琳[1] 赵万生[1] 

机构地区：[1]上海交通大学机械系统与振动国家重点实验室,上海200240

出　　处：《电加工与模具》2016年第6期25-28,共4页Electromachining & Mould

基　　金：国家自然科学基金重点资助项目(51235007)

摘　　要：为了促进电弧加工技术的进一步发展,详细了解和掌握其加工现象背后的机理变得十分必要。借助于高速摄像机和光谱仪,对高速冲液条件下的电弧放电过程进行了实验研究。计算结果表明:弧柱温度远远超过普通电火花温度,是一种更高效的去除材料热源。高速摄像结果指出:流体动力断弧机制可有效地干扰电弧、防止出现稳态电弧放电,促进大能量电加工的稳定进行。此外,还对电弧放电产生的蚀坑形貌进行了研究,结果解释了工件正极性加工能得到更大材料去除率、而工件负极性加工能得到更好表面质量的原因。In order to promote the development of the blasting erosion arc machining（BEAM）technology,an in-depth study of the mechanisms behind the discharge phenomena is essential and necessary. By utilizing the high-speed video camera and spectrograph,the experiment to study the discharge process of BEAM is designed. The measured results show that arc temperature is much higher than spark,which indicates that arc is a more efficient heat source used to remove material. The high-speed camera pictures illustrate that the hydrodynamic arc breaking mechanism is capable of reducing the arc damage by disturbing steady arc discharge. In addition,the analysis of the obtained crater morphology explains the polarity effect existing of BEAM.

关 键 词：高速电弧放电加工 流体动力断弧 单脉冲放电 弧柱温度 蚀坑形貌 

分 类 号：TG661[金属学及工艺—金属切削加工及机床]