In this work, laser transmission joining of thermoplastics and thermoset carbon fiber reinforced plastics is analyzed regarding the occurrence of ablation and pores within the interface of the joint. Therefore, the heating behavior of the used carbon fiber reinforced plastics and the ablation of the upper resin layer of the carbon fiber reinforced plastics are characterized, by performing bead on plate welds using a continuous wave fiber laser (µ ≈ 1064 nm) and a scanner optic. The influence of the applied laser-intensity on the ablation threshold is investigated. Additionally, the temperatures before reaching the ablation threshold are measured by an infrared camera to analyze the ablation mechanisms and to derive a process window for the joining process. The findings are validated by creating joints of carbon fiber reinforced plastics and Polyamide 6, evaluating their morphologic characteristics. The results show that the applied laser intensity and the morphological structure of the used carbon fiber reinforced plastics both have a significant influence on the heating behavior, the ablation threshold and the achievable joint characteristics. It was found that large and pore-free joints can be provided when applying low heating rates by using low laser intensities.

在这项工作中，分析了热塑性塑料和热固性碳纤维增强塑料的激光透射接合，研究了接合处界面处出现的烧蚀和孔洞。因此，通过使用连续波光纤激光器（μ≈1064 nm）和扫描仪在平板焊缝上进行焊缝，可以表征使用过的碳纤维增强塑料的加热行为和碳纤维增强塑料的上部树脂层的烧蚀。光学的。研究了施加的激光强度对消融阈值的影响。另外，在达到消融阈值之前的温度由红外照相机测量，以分析消融机理并得出用于接合过程的过程窗口。通过建立碳纤维增强塑料和聚酰胺6的接缝，评估它们的形态特征，可以验证这一发现。结果表明，所施加的激光强度和所用碳纤维增强塑料的形态结构均对加热行为，烧蚀阈值和可达到的接头特性有显着影响。已经发现，当通过使用低激光强度施加低加热速率时，可以提供大且无孔的接头。