A Novel Laser Pulse Output Algorithm for Three-dimensional Complex Surfaces with Adjustable Spot Intervals

The overlapping ratio of the laser spot plays the decisive role in cutting brittle materials by the controlled fracture mechanism. Conventional method maintains uniformity of spot overlapping ratio by adjusting the scanning speed and repetition frequency. However, the above method bottlenecks when applied to 5-axis machines for machining spatial surfaces. The scanning speed is problematic to maintain constant over complex trajectories, and frequent changes of the laser frequency can make operation more complicated. This paper proposes a novel algorithm for equally spaced laser pulse output based on a five-axis numerical control machine tool. Experiments are implemented to compare the machining results of this algorithm with the traditional equal-time pulse output method. The experimental results show that when the speed varies between 0 and 2100 mm/min, the maximum standard deviation of the spot intervals obtained by executing this algorithm is 3.16 \(\upmu \) $\mathrm{\mu }$ m. This result is much smaller than the data obtained by the equal-time pulse output method under the same experimental conditions.