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针对0.1 mm厚医用聚对苯二甲酸乙二酯(PET)薄膜与0.1 mm厚薄钛板之间的激光透射连接试验,利用商业化软件ANSYS,使用APDL语言编程实现超高斯型热源的动态加载,建立了一个三维热传导模型,使用有限元法求得连接过程中温度场的分布,得到温度场达到准稳态的时间,分析加工速度和激光器功率等工艺参数对连接质量的影响,并计算出不同工艺参数下的连接宽度。通过对PET薄膜与薄钛板的激光透射连接试验接头宽度的测量值进行对比,两者趋势基本吻合,说明该有限元模型是可靠的。
Aiming at the laser transmission connection experiment between 0.1 mm thick PET film and 0.1 mm thick thin titanium plate, the dynamic loading of the super-Gaussian heat source was realized by APDL programming language using commercial software ANSYS. A three-dimensional heat conduction model was established. Finite element method was used to obtain the distribution of temperature field in the process of connection. The temperature field reached the quasi-steady state, and the influence of process parameters such as processing speed and laser power on the connection quality was analyzed. Connection width under process parameters. By comparing the measured values of the width of the laser transmission test of the PET film and the thin titanium plate, the trend of the two is in good agreement, which shows that the finite element model is reliable.