Principle

Nondestructive cutting, also known as thermal laser separation, uses local laser irradiation to produce uneven thermal effect, which generates an uneven temperature field in the heated area. The temperature gradient generated on the surface of the material induces thermal stress. Among them, the temperature of the laser spot is high, which is in compressive stress state, and the surrounding area of the laser spot is in a tensile stress state. Since the compressive rigidity of brittle materials is much greater than the tensile strength, when the tensile stress reaches the material's fracture strength, the material will crack along the laser's moving track.