A theoretical and experimental study on laser-induced deterioration in wet grinding of Al2O3 engineering ceramic
A theoretical and experimental study on laser-induced deterioration in wet grinding of Al2O3 engineering ceramic
复制标题
Al2O3工程陶瓷湿磨激光致劣化的理论与实验研究
DOI：
10.1007/s00170-015-7546-8
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发表时间：
2016-02-01
影响因子：
3.4
通讯作者：
Zhang, G. F.
中科院分区：
文献类型：
--
作者：
Zhang, X. H.;Deng, Z. H.;Zhang, G. F.
通过理论分析和实验研究，探讨了Al2O3工程陶瓷湿磨过程中激光损伤的控制策略。从理论上分析了激光诱导劣化和劣化层湿磨的机理，提出了决定激光诱导凹坑微观形貌和分布的3个关键工艺参数：激光功率密度、激光光斑重叠率和激光扫描轨迹线重叠率。进一步研究了不同激光功率密度下单脉冲凹坑的形成机制以及沿着纵向和横向相邻光斑之间的相互作用机制。确定了关键工艺参数的最佳值。为了进一步客观评价激光诱导变质的效果，进行了激光诱导变质湿磨（LIDWG）和常规磨削（CG）条件下的对比试验。结果表明，激光损伤过程对磨削效果有很大的影响。LIDWG条件下的法向和切向磨削力均低于CG条件下的法向和切向磨削力，最大降低率为72.4%（68.9%）。
A series of theoretical analyses and experimental investigations were performed to examine a strategy for laser-induced deterioration in wet grinding of Al2O3 engineering ceramic. The mechanisms for laser-induced deterioration and wet grinding of the deterioration layer were theoretically analyzed, and the three key processing parameters that determined the micro-topography and distribution of the laser-inducing craters were proposed, including the laser power density, the laser spot overlap ratio, and the laser scanning track line overlap ratio. Further, the forming mechanism of the single pulse-inducing crater under different laser power densities and the interaction mechanisms between adjacent spots along the longitudinal and transverse directions were investigated. The optimal values of the key processing parameters were identified. To further evaluate the effect of laser-induced deterioration objectively, a comparative experiment was conducted under laser-induced deterioration wet grinding (LIDWG) and conventional grinding (CG) conditions. It was found that the procedure of laser-induced deterioration had a strong influence on the grinding results. The normal and tangential grinding forces for LIDWG condition were lower than those for CG condition, with a maximum reduction of 72.4 % (68.9 %).