Annular Beam Technology
The annular beam technology employs an innovative approach aimed at mitigating the issue of
spattering during welding processes. Specifically, it triggers a series of beneficial
effects by directing an annular beam of light around the welding keyhole. Firstly, this
annular beam rapidly vaporizes the metal liquid, generating metal vapor. As this vapor
descends, it exerts a downward counterforce on the welding molten pool. This action helps
open up the keyhole in the molten pool, resulting in a "Y"-shaped configuration, effectively
suppressing surface fluctuations of the molten pool.
This "Y"-shaped keyhole not only reduces fluctuations but also covers the keyhole, preventing
the normal outflow of plasma and thereby decreasing the likelihood of spattering. High-speed
photography studies reveal that, in comparison to traditional laser beams, the annular beam
successfully reduces the proportion of time and the keyhole remains closed from 24% to
approximately 2%. The fewer keyhole closures occur, the lower the chances of spattering.
Experimental results demonstrate that, compared to traditional laser beams, the annular beam
significantly reduces spattering, lowering the probability by more than 92%, particularly
eliminating defects caused by substantial spattering, such as quality loss and pitting.