Laser cutting using dynamically modulated intensity distribution

Abstract

The precise control of the laser beam intensity distribution facilitates the optimization of laser processing performance. This not only presents opportunities for enhancing the process efficiency but also proves advantageous in scenarios where the same laser power level is employed, surpassing traditional methods. This study introduces a novel approach by dynamically modulating the laser beam profile to achieve a non-symmetrical intensity distribution. A detailed investigation into the laser cutting process using modulated beam intensities is conducted by employing a high-speed imaging system. Moreover, the maximum cutting speed, cut edge quality, and cut kerf geometries are evaluated when different strategies are applied. The results demonstrate a noticeable improvement in the cut edge quality compared to a static beam strategy (SBS) and the recently developed conventional dynamic beam shaping (DBS). In addition to laser cutting, examples of such modulation in laser welding and hardening are proposed. This innovative technique offers promising advancements in the field of laser processing.