The effect of laser cutting can be affected by many factors, such as laser pulse width and defocusing amount.

1. The influence of laser pulse width and the curve of slit width versus laser pulse width. It can be seen that the slit width increases with the increase of pulse width. For the laser used in the test, the average power of the laser increases with the increase of the pulse width. The influence of laser frequency can be seen that the slit width increases with the increase of pulse frequency. When the frequency is greater than 35Hz. The slit width tends to decrease. This is due to the increased pulse frequency. Although the spot diameter does not change, the number of pulses per unit time increases. The heat accumulation effect is significant, which increases the slit width.

2. The influence of defocusing amount can be seen that the defocusing amount has a great influence on the kerf width. When the defocusing amount is too small or too large, the kerf is wide. When the defocusing amount is 0, that is, when the focus is just on the workpiece surface, the slit is narrow. The influence of cutting speed can be seen that with the increase of cutting speed. The slit width has no obvious change, but slightly decreases, which has little effect on the slit width. This is because. When the cutting speed is slow, the action time of energy on the front edge of the incision is prolonged, and the slit width is increased; With the increase of cutting speed, the interaction time between the laser beam and the material becomes shorter. The actual input laser energy decreases, making the heat conduction and thermal diffusion effects smaller, so the kerf width decreases. When the cutting speed is too fast, it is easy to produce the phenomenon of impermeability due to insufficient heat input.