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Indexed by:期刊论文

Date of Publication:2018-01-01

Journal:JOURNAL OF MATERIALS PROCESSING TECHNOLOGY

Included Journals:Scopus、SCIE、EI、ESI高被引论文

Volume:251

Page Number:109-117

ISSN No.:0924-0136

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

Abstract: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.