PHOENIX

Motivation 

Continuous-wave (cw) laser structuring is a key process step in thermal direct joining and, to date, cannot be adequately measured or controlled in situ. On the one hand, the structure quality is significantly influenced by varying factors such as material composition, component geometry, surface condition, and the laser system technology employed. On the other hand, existing single-sensor systems are unable to reliably capture essential structural parameters such as depth, flank angle, or undercuts. Therefore, the subproject “Multimodal Sensor Fusion and Real-Time Control for cw Laser Structuring Processes” aims to implement inline monitoring as well as adaptive process control.

Objective and Approach

Specifically, the research activities aim to detect and actively influence the structural parameters in real time through the fusion of photonic emission and acoustic signals. This ensures reproducible structure quality for industrial joining processes such as thermal direct joining, drastically reduces the extensive inspection effort required for post-process component quality control, and guarantees a low scrap rate.

Innovation und Perspectives

The project goes well beyond the current state of the art, as it is the first to fuse acoustic and photonic sensor data in real time for process control and quality assurance in cw laser structuring. In the long term, this enables fully digitalized, adaptive, and cost-efficient laser structuring for industrial series production processes.