Dynamic beam modulation for optimization of industrial laser processes (FastShape)

用于优化工业激光工艺的动态光束调制 (FastShape)

• 批准号: 426328417
• 负责人: Professor Dr. Thomas Graf
• 金额: --
• 依托单位: Institut für Werkstoffwissenschaft
• 依托单位国家: 德国
• 项目类别: Research Grants (Transfer Project)
• 财政年份: 2019
• 资助国家: 德国
• 起止时间: 2018-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/426328417?language=en
• 关键词: Dynamic; beam; modulation; optimization; industrial

7Two difficult processes of laser material processing with efficient solid-state lasers (at a wavelength of approx. 1 µm) are the focus of this project: On the one hand, the fusion cutting of steel sheets with thicknesses of 8-20 mm with good quality with efficient solid-state lasers has long been a wish of many industrial users. On the other hand, the switch to electromobility requires high-quality and efficient joining processes for electro-copper sheets with thicknesses in the 0.5-3 mm range. Both laser cutting of thick steel sheets and laser welding of copper with solid-state lasers still show process instabilities, which lead to massive deficits in quality and performance, thus hindering a broad industrial implementation of these applications.Fundamental investigations at IFSW have already shown that these instabilities can be suppressed by influencing the geometry of the interaction zone (IA-zone) of the laser with the material and that an optimization of the processing results can be achieved. This was verified experimentally with the X-ray system of IFSW, which is unique in Europe. Using X-ray technology and IFSW's own polarization goniometer, the geometry of the IA-zone can be recorded and displayed during machining.Empirical studies at the IWS have shown that a significantly improved quality and performance can be achieved for cutting and welding processes by using dynamic beam modulation. Dynamic beam modulation in the system engineering sense used here includes in particular the fast temporal and spatial deflection of a laser beam with respect to its static propagation axis moved in relation to the processed material according to the processing speed and, if required, a position-dependent high-frequency power control.In the planned research project, the physical mechanisms of action of the dynamic beam modulation on the geometry of the IA-zone and the resulting process result are to be identified in order to adapt and optimize the methods of dynamic beam modulation used at the IWS to the exemplary applications of the cooperation partners with the aid of the diagnostic techniques developed at the IFSW for implementation. The aim is to be able to adjust the geometry of the IA-zone actively and reproducibly for the given applications and thus to be able to demonstrate an increased quality and performance of the specified exemplary applications of cutting and welding.

使用高效固体激光器(波长约为。1µm)是本项目的重点：一方面，利用高效的固体激光器对8- 20mm厚度的钢板进行高质量的熔化切割一直是许多工业用户的愿望。另一方面，向电动汽车的转变需要高质量和高效的连接工艺，厚度在0.5- 3mm范围内的电铜片。厚钢板的激光切割和铜的固体激光焊接仍然存在工艺不稳定性，这导致了质量和性能的巨大缺陷，从而阻碍了这些应用的广泛工业实施。IFSW的基础研究已经表明，这些不稳定性可以通过影响激光与材料相互作用区（ia区）的几何形状来抑制，并且可以实现加工结果的优化。IFSW的x射线系统在实验中证实了这一点，这在欧洲是独一无二的。利用x射线技术和IFSW自己的偏振角计，可以在加工过程中记录和显示ia区的几何形状。IWS的实证研究表明，通过使用动态光束调制，可以显著提高切割和焊接过程的质量和性能。这里使用的系统工程意义上的动态光束调制特别包括激光束相对于其静态传播轴相对于加工材料移动的快速时间和空间偏转，根据加工速度，如果需要，还包括位置相关的高频功率控制。在计划的研究项目中，将确定动态波束调制对ia区几何形状的作用的物理机制以及由此产生的过程结果，以便在IFSW开发的诊断技术的帮助下，适应和优化IWS使用的动态波束调制方法，以适应合作伙伴的示范应用。其目的是能够根据给定的应用主动地和可重复地调整ia区的几何形状，从而能够证明切割和焊接的指定示例应用的质量和性能的提高。