|کد مقاله||کد نشریه||سال انتشار||مقاله انگلیسی||ترجمه فارسی||نسخه تمام متن|
|5017625||1466716||2018||9 صفحه PDF||سفارش دهید||دانلود کنید|
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 (1.5Â mm, 2.0Â mm, 3.0Â mm varied with increasing of vapor-to-melt ratio) and the calculations show that the particle diameter decreases rapidly (70Â Î¼m, 60Â Î¼m, 35âÎ¼m) with vapor-to-melt ratio after increasing to an extreme value (80Â â¼Â 85Â Î¼m). 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.
Journal: Journal of Materials Processing Technology - Volume 251, January 2018, Pages 109-117