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使用ANSYS软件,建立了使用激光透射焊接技术焊接透明聚氯乙烯(PVC)的三维有限元热分析模型,利用APDL编程实现高斯型热源的动态加载,得到了温度场的分布;进一步分析了焊接速度、激光平均功率和光斑直径等工艺参数对焊接质量的影响,并计算出焊缝宽度。结果表明,随着焊接速度的增加,焊缝区域的最高温度逐渐降低,焊缝宽度逐渐减小;当激光平均功率增大时,焊缝区域的最高温度增高,焊缝宽度增大;而当光斑直径增大时,焊缝宽度增大,但焊缝处的最高温度有所下降。焊缝宽度计算值与实验测量值相比,二者比较吻合。
Using ANSYS software, a three-dimensional finite element thermal analysis model of transparent polyvinyl chloride (PVC) welded by laser transmission welding technology was established. The dynamic loading of Gaussian heat source was realized by using APDL programming, and the distribution of temperature field was obtained. The welding speed , The average laser power and spot diameter and other process parameters on the quality of welding, and calculate the weld width. The results show that with the increase of welding speed, the maximum temperature in the weld zone decreases and the weld width decreases. When the average laser power increases, the maximum temperature in the weld zone increases and the weld width increases. As the spot diameter increases, the weld bead width increases, but the maximum temperature at the weld point decreases. The calculated value of the weld width is in good agreement with the experimental measurement value.