Welding in the World ( IF 2.1 ) Pub Date : 2020-08-25 , DOI: 10.1007/s40194-020-00973-5 Nam-Phong Nguyen , Stefan Behrens , Maximilian Brosda , Alexander Olowinsky , Arnold Gillner
The growing demands on the quality of plastic components and the trend towards miniaturisation are posing a great challenge on plastics processing technology. As many complex components can no longer be manufactured in a single step, joining processes such as laser transmission welding are gaining in importance. In classic laser transmission welding, the joining partners have different optical properties. The upper joining partner is transparent in the laser wavelength range, whilst the lower partner is absorbent due to the addition of absorber materials. In medical and biotechnological applications, the addition of absorber materials is often undesirable due to strict biocompatibility requirements. If, on the other hand, radiation sources are used which emit radiation in the area of the natural absorption of the plastic (λ = 1600–2000 nm), untreated transparent plastics can also be welded. In this work, a theoretical model will be presented to calculate the temperature distribution and progression during quasi-simultaneous welding using a thulium fibre laser (λ = 1940 nm). A sensitivity analysis is carried out to investigate the influence of different parameters on the heat affected zone (HAZ). The simulated HAZ is then compared with the HAZ from the experimental work.
中文翻译:
无吸收剂准同时激光焊接透明塑料的建模和热仿真
对塑料部件质量的日益增长的需求以及向小型化的趋势对塑料加工技术提出了巨大的挑战。由于许多复杂的组件无法再通过单个步骤制造,因此诸如激光透射焊接之类的接合过程变得越来越重要。在经典的激光透射焊接中,连接伙伴具有不同的光学特性。上连接伙伴在激光波长范围内是透明的,而下连接伙伴由于添加了吸收剂材料而具有吸收性。在医学和生物技术应用中,由于严格的生物相容性要求,通常不希望添加吸收剂材料。另一方面,如果使用的辐射源在塑料的自然吸收区域(λ= 1600–2000 nm)内发出辐射,未经处理的透明塑料也可以焊接。在这项工作中,将提出一个理论模型来计算使用using光纤激光器(λ= 1940 nm)进行准同时焊接时的温度分布和进程。进行敏感性分析以研究不同参数对热影响区(HAZ)的影响。然后将模拟的热影响区与实验工作中的热影响区进行比较。