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利用ANSYS软件建立了光组件有限元简化模型,以高斯热源为热源模型,采用非线性瞬态分析完全法对焊缝的温度场分布进行数值模拟,获得在不同激光输出功率和激光光斑半径下焊斑大小和深度的变化规律。结果表明,周期较短的脉冲波形能够有效改善焊接质量;焊斑熔深和宽度随激光输出功率的增大而增大,随激光光斑半径的增大而减小;数值仿真效果与焊缝实际焊接效果基本吻合,验证了光组件有限元模型的适用性,为在不同激光焊接工艺条件下预测和提高光组件焊接质量提供了有效的实验依据。
The simplified finite element model of optical components was established by ANSYS software. The Gaussian heat source was used as the heat source model, and the nonlinear transient analysis method was used to simulate the temperature field distribution of the weld seam. The welding parameters were obtained under different laser output power and laser spot radius Variation of spot size and depth. The results show that the pulse waveform with short period can effectively improve the welding quality. The penetration depth and width of the weld spot increase with the increase of the laser output power and decrease with the increase of laser spot radius. The numerical simulation results are in good agreement with the actual weld The welding results are basically consistent, which verifies the applicability of the finite element model of optical components. It provides an effective experimental basis for predicting and improving the welding quality of optical components under different laser welding conditions.