Closed-loop power and focus control of laser welding for full-penetration monitoring
作者： Fabrice Bardin , Adolfo Cobo , Jose M. Lopez-Higuera , Olivier Collin , Pascal Aubry
DOI: 10.1364/AO.44.000013
关键词:
摘要: We describe a closed-loop control system ensuring full penetration in welding by controlling the focus position and power of 4-kW Nd:YAG laser. A monitoring was developed based on chromatic aberration focusing optics. With laser we can determine degree analyzing keyhole image intensity profile. demonstrate performance bead-on-plate Inconel 718 titanium. The maintained focal tilted nonflat workpieces, technique successfully controlled to maintain full-penetration regime presence linear step changes thickness. Finally discuss performances limits systems when applied realistic complex aerospace component.
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