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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。
During laser milling, the energy is radiated onto the substrate surface in the form of local heat sources. The concentrated energy causes the temperature field in the milling process to be unevenly distributed and unstable. Taking the laser milling of Al2O3 ceramic material as an example, the finite element model of three-dimensional temperature field of laser multi-path milling was established. The movement of heat source in multi-pass milling is simulated by ANSYS software APDL (ANSYS Parametric Design Language). The simulation results show that as the milling process progresses, the temperature of the center of the next milling path flare is higher than the center temperature of the previous milling path and has a large heat-affected zone. The temperature gradient changes most greatly in the scanning direction Milling sample edge area. The simulation results of the maximum temperature and the experimental results in the literature for comparison, consistency is better.