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首页> 外文期刊>Joining Plastics >Design-related and process technology aspects with regard to the laser transmission welding of large-format, thin-walled plastic components -Part 1: Virtual optimisation of plastic components for the laser transmission welding process
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Design-related and process technology aspects with regard to the laser transmission welding of large-format, thin-walled plastic components -Part 1: Virtual optimisation of plastic components for the laser transmission welding process

机译：大型薄壁塑料部件的激光透射焊接的设计相关和工艺技术方面-第1部分：用于激光透射焊接工艺的塑料部件的虚拟优化

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摘要

In the case of large-format plastic components which are utilised in visible areas, stringent requirements are set on the finish of the external surface. In particular, joining welds with joined components located behind must not be evident on the front side although the wall thicknesses are becoming ever lower for material-saving reasons. Furthermore, the external dimensions of the components necessitate alternative design and clamping concepts in order to be able to execute a gap-free welded joint. The utilisation of CAE methods for designing or optimising the laser transmission welding process for the joining of plastic components is explained in the first part of the article. In the case of laser transmission welding, it is decisive that there is no gap between the joining members during the joining operation because this would prevent a material-locking joint. In order to be able to estimate the risk of the formation of a welding gap, it is being investigated at the Institute for Plastics Processing (IKV) to what extent injection-moulded components can be provided with such a structural design that, with regard to their shrinkage and distortion behaviour, they exhibit optimum properties for joining with the laser transmission welding process. In addition to the structural design, the risk of the formation of a welding gap is estimated by means of the simulation of the shrinkage and distortion behaviour during the injection moulding process and of a coupled simulation of the mechanical behaviour of the components when a joining force is applied. In conclusion, a statement can be made about whether a joint can be executed by means of laser transmission welding and which process variant is suitable for this.
机译：对于在可见区域中使用的大幅面塑料组件，在外表面的光洁度方面有严格的要求。特别地，尽管壁厚由于节省材料的原因而变得越来越小，但是在前侧上的接合焊缝与位于后面的接合部件之间的接合必须不明显。此外，部件的外部尺寸需要替代的设计和夹紧概念，以便能够执行无间隙的焊接接头。本文的第一部分介绍了CAE方法在设计或优化用于塑料部件连接的激光透射焊接工艺中的应用。在激光透射焊接的情况下，决定性的是在接合操作期间接合构件之间没有间隙，因为这将防止材料锁定接合。为了能够估计形成焊接间隙的风险，塑料加工研究所（IKV）正在研究在多大程度上可以为注塑部件提供这样的结构设计，使得它们具有收缩和变形特性，在与激光透射焊接工艺结合时表现出最佳性能。除了结构设计之外，还可以通过模拟注塑过程中的收缩和变形行为以及结合力时部件的机械行为的耦合模拟来估计形成焊接间隙的风险。被申请;被应用。总而言之，可以做出关于是否可以通过激光透射焊接来执行接头以及哪种工艺方案适合于此的陈述。

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