1. The influence of focal position on the roughness of the cut surface: The influence of focal position on the roughness of the cut surface.
2. The influence of laser power and cutting speed on the cut width: The width of the cut increases with the increase of laser power and decreases with the increase of cutting speed.
3. The influence of laser power on the roughness of the cut surface: Under a certain plate thickness and cutting speed, there is an optimal laser power range, within which the roughness of the cut surface is the smallest. The roughness will increase if it deviates from the optimal power range; further increasing or decreasing the power will cause overburning or slag defects.