- 标题
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- 实验方案
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Laser-based surface pre-treatment for metal-plastic hybrids using a new process strategy
摘要： In order to join metal-plastic hybrid parts so as to achieve lightweight constructions, innovative joining technologies are essential. For this, thermal joining is a promising approach due to the absence of any joining agent. The joint strength can be increased by surface pre-treatment of the metal with continuous wave laser radiation. Large joining areas, however, are challenging in terms of productivity, efficiency and geometrical flexibility when beam trajectories, which can be easily combined with on-the-fly processing. More precisely, a load direction, and causes lower thermal distortion of the metal sheet than using conventional processing of large areas. In this context, the resulting topography of the metal was analyzed circularly oscillating laser focal spot is geometrically independent of every possible in-plane with respect to the surface roughness and a design criterion was mathematically derived and experimentally validated. Additionally, the joint strength was compared to the strength using conventional beam trajectories. A more promising approach is the use of continuous with a carbon-fiber-reinforced thermoset. The laser-based pre-treatment using the circularly oscillating laser focal spot led to a similar joint strength, while being more productive when resulting from conventional beam trajectories. For verification, steel substrates were joined combined with on-the-fly processing, compared to conventional structuring trajectories.
关键词： surface pre-treatment,continuous wave laser radiation,metal-plastic hybrids,thermal joining
更新于2025-09-23 15:19:57
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[Laser Institute of America ICALEO? 2016: 35th International Congress on Applications of Lasers & Electro-Optics - San Diego, California, USA (October 16–20, 2016)] International Congress on Applications of Lasers & Electro-Optics - Laser radiation as a robust tool for the surface pre-treatment of FRP prior to adhesive bonding
摘要： Within the research project “ProPhoMuLA“, funded by the Federal Ministry of Education and Research (BMBF), fundamentals for innovative laser pre-treatment processes for fiber reinforced plastics (FRP) are elaborated in order to improve the adhesive joining properties of multi-material joints, e.g. FRP-FRP or FRP-metal-joints. The increasing application of material mixture results in a growing importance of the adhesive bonding technology as the most promising joining technique for multi-material joints. Until now, the use of adhesive bonding for multi-material joints is, however, connected with high process-technical expenditure. In addition, despite the successful implementation in individual applications, the methods have not yet been sufficiently developed for automotive large-scale manufacturing. One of the most important challenges is the provision of robust surface pre-treatment methods in order to ensure efficient and durable adhesively bonded joints. The possibility of in-line application is an advantage of the laser pre-treatment compared to other surface pre-treatment technologies such as sand blasting or grinding. Therefore, the application of laser pre-treatment technologies based on photonic production methods is predestined for this task. Numerical simulations are performed to analyze the influence of laser surface pre-treatment on automotive product developments. Suitable simulation methods are identified and validated regarding the functionality of the considered approach. The results of empirical investigations show that the laser pre-treatment is suitable, especially for the pre-treatment of thermoplastic FRP, where an increase of peel resistance to the factor of four in comparison to conventional pre-treatment techniques can be achieved.
关键词： photonic production methods,FRP,adhesive bonding,laser pre-treatment,surface pre-treatment
更新于2025-09-16 10:30:52