During laser deep penetration welding, the keyhole undergoes violent oscillation. Its opening morphology, molten pool flow and spatter behavior directly determine weld quality, while this process imposes stringent requirements on strong light suppression and imaging frame rate.
A Revealer high-speed camera, operating at a frame rate of 8000 fps and paired with a pulsed laser active illumination system, was used for real-time imaging of the welding zone. The system clearly captures the dynamic variation of the keyhole opening, surface fluctuation of the molten pool and ejection trajectories of micro-spatters.
It provides visual evidence for exploring the formation mechanisms of keyhole instability and porosity defects, and supports laser power modulation and process optimization.
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