Investigation of a single-pulse electrical arc discharge in vacuum based on the crater morphology and discharge channel
Investigation of a single-pulse electrical arc discharge in vacuum based on the crater morphology and discharge channel
复制标题
基于弧坑形貌和放电通道的真空单脉冲电弧放电研究
DOI：
10.1007/s00170-020-05163-7
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发表时间：
2020
影响因子：
3.4
通讯作者：
Yao Zhenyang
中科院分区：
文献类型：
--
作者：
Zhu Guang;Zhang Min;Zhang Qinhe;Xing Qixuan;Yao Zhenyang
为了提高电加工的加工效率，提出了一种新的电加工方法--电弧加工（EAM），并获得了很高的加工效率。之后，人们对电火花加工机理进行了大量的研究，但至今还没有对电火花加工在真空中的行为进行研究。因此，为了完善EAM理论体系，本文设计并开展了负压环境下单脉冲电弧放电行为的研究。研究了不同放电电流、放电时间和真空度条件下的熔坑形貌，包括变色区直径（Dh）、熔化区直径（Dm）、熔坑直径（Dc）、熔坑深度（h）、白色层厚度、熔化体积（Vm）、去除体积（Vr）和去除体积比。得到了负压环境下电弧放电的规律性特征，改进了弧柱压力的理论模型。
To improve the machining efficiency of electric machining, a novel method, called electro-arc machining (EAM), was put forward and obtains a great machining efficiency. Afterwards, many researches were conducted to investigate the machining mechanism of EAM; however, up to now, the behaviors of EAM in vacuum had not been studied yet. Therefore, in order to improve the EAM theoretical system, an investigation about the behaviors of single-pulse electro-arc discharge in a negative pressure environment was designed and conducted. The crater morphology, including discolored area diameter (Dh), molten area diameter (Dm), crater diameter (Dc), crater depth (h), white layer thickness, molten volume (Vm), removal volume (Vr), and removal volume ratio, was studied with different discharge current, discharge time, and vacuum degree. The regular characteristics of electro-arc discharge in a negative pressure environment were obtained, and the theoretical model of arc column pressure was improved.