Abstract

In infrared welding, the heating phase is the phase offering the highest flexibility of choice regarding the process parameters. In this phase, the process parameters such as the heating time, emitter power, and emitter-component distance can be individually selected and combined with each other. The defined heating phases have a different influence on the joining components. In this work, the effects of four heating strategies and their influence on the resulting temperature distribution over the joining surface, the possible thermal material degradation, the morphology of the joining zone, and the short-term tensile strength of the welded samples are investigated. In order to investigate the morphology, microsections are prepared which enable transmitted light microscopy of the black PA6 GF50 used. In summary, it can be concluded that different heating strategies have a different influence on the material even if the generated melt layer thickness is kept the same. Three of the four strategies result in material degradation on the joining surface. However, this has almost no effect on the resulting short-term strength of the weld. The results allow the interpretation that a high joining pressure compensates for the influence of the material damage by pressing the damaged material into the bead.

中文翻译：

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不同加热策略对玻纤增强聚酰胺6红外焊接接头性能的影响

摘要

在红外焊接中，加热阶段是在工艺参数方面提供最高灵活性选择的阶段。在此阶段，可以单独选择加热时间、发射器功率和发射器组件距离等工艺参数并相互组合。定义的加热阶段对连接部件有不同的影响。在这项工作中，研究了四种加热策略的效果及其对连接表面温度分布、可能的热材料降解、连接区域的形态以及焊接样品的短期拉伸强度的影响。为了研究形态，制备了显微切片，从而能够对所用的黑色 PA6 GF50 进行透射光显微镜观察。综上所述，可以得出结论，即使生成的熔体层厚度保持相同，不同的加热策略对材料也会产生不同的影响。四种策略中的三种会导致连接表面的材料降解。然而，这对焊缝的短期强度几乎没有影响。结果可以解释为，高连接压力通过将损坏的材料压入珠中来补偿材料损坏的影响。