Al2O3陶瓷激光多道铣削温度场有限元模拟

激光铣削时能量是以局部热源的形式照射到基体表面上,集中的能量会引起铣削过程中温度场分布不均匀和不稳定。以Al2O3陶瓷材料激光铣削为例,建立了激光多道铣削的三维温度场有限元模型。利用ANSYS软件中的APDL(ANSYS Parametric Design Language)语言模拟了多道铣削时热源的移动。模拟结果表明:随着铣削过程的进行,后面的铣削道光斑中心的温度比前面的铣削道的中心温度高,且具有的热影响区也大;温度梯度变化最大的地方是在扫描方向发生改变的铣削样件边沿区域。将模拟结果的最高温度和文献中的实验结果进行比对,一致性较好。

Finite element simulation of thermal distribution in laser multi-track milling of Al2O3 ceramics

The energy of the laser milling was input to the sample surface in the mode of local heat, which can cause the uneven and unstable of the temperature field during the laser milling. Take the laser milling on the Al2O3 ceramic materials for an example, the article set up the 3D finite element simulation model of the laser milling temperature field. The heat moving of the laser milling was simulated by the APDL language of the ANSYS software. The result of the simulation shows that the temperature of the center spot of the back track is higher than the front track with the process of the laser milling. The greatest temperature gradient located on the sample edge area in the scanning direction changes. The maximum temperature in the simulation results and literature experimental results for comparison are in good agreement.