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Laser cutting is the use of a focused high-power density laser beam to irradiate a workpiece, causing the irradiated material to quickly melt, vaporize, burn, or reach the ignition point. At the same time, high-speed airflow coaxial with the beam is used to blow away the molten material, thereby achieving the cutting of the workpiece. Laser cutting is one of the thermal cutting methods.

The laser beam is focused into very small light spots, achieving a high power density at the focal point. At this point, the heat input by the beam far exceeds the part reflected, conducted, or diffused by the material, and the material quickly heats up to the point of vaporization, forming pores through evaporation. As the beam moves linearly relative to the material, the hole continuously forms a narrow slit. The cutting edge is minimally affected by heat, and there is basically no deformation of the workpiece.

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