应用二极管激光器对铝膜作为吸收层的聚碳酸酯进行了激光透射焊接实验, 以不同铝膜宽度为主要影响因素, 结合激光功率、焊接速度因素采用单因素实验法与响应曲面法相结合的方式对焊接工艺参数进行了优化, 得到了拟合方程及最佳焊接工艺参数组合, 重点分析了铝膜宽度与焊缝宽度的关系。采用COMSOL软件建立了基于铝膜中间层的有限元模型, 研究了焊接工艺参数作用下的温度场分布, 结果表明模拟焊缝宽度与实验焊缝宽度吻合。

In this paper, a diode laser was used to conduct laser transmission welding experiments on polycarbonate with aluminum film as the absorption layer. The welding process parameters were optimized by the combination of single factor experiment method and response surface method with different aluminum film width as the main influencing factor, combined with laser power and welding speed. The fitting equation and the optimal welding process parameters were obtained. The relationship between the width of the aluminum film and the width of the weld was analyzed. The finite element model based on the middle layer of aluminum film was established by COMSOL software. The temperature field distribution under the welding process parameters was studied. The results show that the simulated weld width is consistent with the experimental weld width.