External Electric Field-Assisted Laser Percussion Drilling for Highly Reflective Metals
External Electric Field-Assisted Laser Percussion Drilling for Highly Reflective Metals
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DOI：
10.1155/2013/156707
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发表时间：
2013
影响因子：
2.1
通讯作者：
Chao-Ching Ho;Guan-Ru Tseng;Yuan-Jen Chang;J. Hsu;C. Kuo
中科院分区：
文献类型：
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作者：
Chao-Ching Ho;Guan-Ru Tseng;Yuan-Jen Chang;J. Hsu;C. Kuo
在高反射材料的激光冲击钻孔中，采用了外加电场。激光产生的等离子体被大量溅射，等离子体羽流中的带电离子被电极吸出。本文提出并研究了不同配置的平板电极，以提供一种简单、低成本的方法，在冲击钻井过程中排出激光诱导的等离子体。电场是由施加在两个电极上的电位产生的。当激光产生的等离子体在平面平板充电电容器中产生时，这种电扰动产生了均匀的电场。本文还模拟了不同电极结构作用于携带电子的带电粒子的电场。所有的加工工作都是在标准大气条件下进行的，没有辅助工艺气体。测量了不同电极配置下的钻孔深度，并以此评价冲击钻孔速率。结果表明：在外加电场作用下，汽化碎片被排出；因此，在最优配置下，穿透深度可增加91.1%。
In this study, an external electric field was employed during the laser percussion drilling on highly reflective materials. The laser-produced plasma was sputtered substantially, and the charged ions in the plasma plume were drawn by the electrodes. Different configurations of plate electrodes were proposed and investigated in this work to provide a simple, low-cost method that allows expelling the laser-induced plasma during the percussion drilling process. The electric field resulted from the potential that was applied across the two electrodes. This electrical perturbation produced a uniform electric field when the laser-generated plasma was created in the plane plate-charged capacitor. The electric field with different electrode configurations applied to the charged particles that are carrying the electrons was also simulated in this work. All processing work was performed in air under standard atmospheric conditions and in the absence of assisting process gas. The depth of the holes drilled when various types of electrode configurations were used was measured, and the results were used to evaluate the percussion drilling rate. Results show that vaporized debris is expelled by the applied electric field; hence, in optimal configuration the penetration depth can be increased by up to 91.1%.