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论文类型：期刊论文

发表时间：2018-01-01

发表刊物：JOURNAL OF MATERIALS PROCESSING TECHNOLOGY

收录刊物：Scopus、SCIE、EI、ESI高被引论文

卷号：251

页面范围：109-117

ISSN号：0924-0136

关键字：Laser cutting; Al2O3 ceramic plate; Atomization model; Particle diameter prediction; Vapor-to-melt ratio

摘要：In order to predict the particle size of molten removal in laser cutting Al2O3 ceramic plate, an atomization model based on vapor-to-melt ratio is developed to reveal the relationship between material remove forms and results during the process of vaporization-melt. Model correction of vapor-to-melt ratio with different parameters is obtained by laser cutting of 96.4% Al2O3 ceramic plate to get the slit width. The experimental verification is carried out on a JK701H Nd:YAG pulse laser cutting system by simulating under the regression correction of melt flow diameter. Micro-observation on the molten particles with different plate thickness (1.5 mm, 2.0 mm, 3.0 mm varied with increasing of vapor-to-melt ratio) and the calculations show that the particle diameter decreases rapidly (70 mu m, 60 mu m, 35 mu m) with vapor-to-melt ratio after increasing to an extreme value (80 85 gm). It is proved that there is an antagonistic relationship between kinetic and thermodynamic effect in the impact of vapor-to-melt ratio (with critical value of 0.1) on the morphology of cutting removal. The results show good agreement between atomization model and experiments with average error below 8%. The analysis verifies this model is feasible and it makes contribution to determine the reasonable processing parameters (such as the control of vapor-to-melt ratio) in laser precision cutting.