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Innovative Joining Process - Basics of Laser Beam Welding of Thermoplastics

机译：创新的连接工艺-热塑性塑料激光束焊接的基础

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摘要

Current product development showing an ever shrinking physical volume is asking for new reliable joining technologies. Laser beam technologies conceal innovative Solutions to over-come limitations of conventional joining technologies. Laser beam welding of thermoplastics offers several process technical advantages. The joining energy is fed contact-less into the joining area, avoiding mechanical stress and thermal load to the joining partners. The energy is supplied spatially (seam width on the order of 100 um) and timely (interaction time on the order of ms) very well defined. Different process strategies are possible leading to flexibility, product adapted Irradiation, short process times and high quality weld seams as well as to high Integration abilities and automation potentials. During the joining process no Vibration, no thermal stress, no particle release takes place. Therefore, destruction of mechanically and electronically highly sensitive components, such as microelectronics, is avoided. The work place pollution is neglectable compared to other joining technologies, such as gluing (fume) or ultrasonic welding (noise, pieces of fluff). Not only micro-components can be welded in a reproducible way but also macro-components while obtaining a hermetic sealing with good optical appearance. In this publication an overview concerning process technical basis, as-pects and challenges is given.
机译：当前产品开发显示出不断缩小的物理体积，正在寻求新的可靠连接技术。激光束技术隐藏了创新的解决方案，以克服传统连接技术的局限性。热塑性塑料的激光束焊接具有多种工艺技术优势。将连接能量以非接触方式馈入连接区域，从而避免了机械应力和对连接对象的热负荷。很好地定义了空间上提供的能量（缝宽度大约为100 um），及时提供了能量（交互时间大约为ms）。不同的处理策略可能导致灵活性，适应产品的辐照，较短的处理时间和高质量的焊缝，以及很高的集成能力和自动化潜力。在连接过程中，没有振动，没有热应力，没有颗粒释放。因此，避免了破坏机械和电子上高度敏感的组件，例如微电子器件。与其他连接技术相比，工作场所的污染可以忽略不计，例如胶合（烟气）或超声波焊接（噪声，绒毛）。在获得具有良好光学外观的气密密封的同时，不仅可以以可重现的方式焊接微型零件，还可以焊接大型零件。在该出版物中，给出了有关过程技术基础，方面和挑战的概述。

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