Physics-based modeling and micro-burr removal mechanism analysis for laser-induced plasma deburring
Physics-based modeling and micro-burr removal mechanism analysis for laser-induced plasma deburring
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激光诱导等离子体去毛刺的物理建模和微毛刺去除机理分析
DOI：
10.1016/j.jmapro.2022.01.025
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发表时间：
2022
影响因子：
6.2
通讯作者：
Wu, Benxin
中科院分区：
文献类型：
--
作者：
Song, Hanyu;Wu, Benxin
毛刺是加工等制造过程中经常产生的，往往需要去除。微去毛刺通常是非常具有挑战性的，因为毛刺的尺寸与它们附加的有用的微特征和/或特征的脆弱性等的比例很大。通讯作者之前的论文（Journal of Manufacturing Science and Engineering, 136(2): 024501）报告了一种新型激光诱导等离子体去毛刺（LPD）工艺的初步实验研究，该工艺具有几个潜在的优势，可以帮助解决微去毛刺的挑战。但是，之前LPD实验中毛刺的去除机理还需要进一步的研究来理解。本文建立了激光诱导等离子体流动和等离子体毛刺相互作用的物理模型。通过将该模型的预测结果与先前的一些实验测量结果进行比较，验证了该模型的有效性。然后利用该模型揭示了上述LPD实验中毛刺去除的主导机制。在研究的条件下，发现等离子体对毛刺的热效应不太可能在毛刺去除中起主要作用。相反，等离子体在毛刺上产生的高压可以产生足够大的应力来去除毛刺。因此，在所研究的条件下，在LPD过程中，毛刺的去除可能主要是通过机械机制而不是热机制。
Burrs are often generated in manufacturing processes such as machining, and they often need to be removed. Micro deburring is often very challenging due to the large size ratios of burrs to their attached useful micro features and/or the fragility of the features, etc. The corresponding author's previous paper (Journal of Manufacturing Science and Engineering, 136(2): 024501) reports preliminary experimental study of a novel laser-induced plasma deburring (LPD) process, which has several potential advantages and could help address the challenges in micro deburring. However, the burr removal mechanism in the previous LPD experiment still requires further study to understand. In this paper, a physics-based model is developed for laser-induced plasma flow and plasma-burr interactions. The model is validated by comparing its predictions with some previous experimental measurements. Then the model is used to reveal the dominant burr removal mechanism in the aforementioned previous LPD experiment. Under the conditions studied, it has been found that the plasma-induced thermal effect on the burr is unlikely to play a major role in the burr removal. Instead, the high pressure induced by the plasma on the burr can induce stresses potentially large enough to remove the burr. Therefore, the burr removal is likely mainly through a mechanical mechanism instead of a thermal mechanism during the LPD process under the conditions studied.
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