CUTTING METHOD FOR BRITTLE NON-METALLIC MATERIALS (TWO VARIANTS)

摘要

The aim of present invention is to improve the efficiency and quality of the cutting of brittle non-metallic materials. In the first variant, the inventive method for cutting brittle non-metallic materials consisting in notching along cutting line and in additionally acting on the surface of the material, is characterised in that the additional action on the surface of the material is performed with at least one elastic wave source in the area of the notch, the amplitude and frequency of elastic waves are selected according to a condition of deepening the notch to the predetermined depth or cutting through said material. In the second variant, the notching is performed by heating the material surface along the cutting line with the aid of a laser beam elongated therealong and by locally cooling the heated area. The additional action on the material surface is performed by successively cooling each point of the cutting line in the heating area during a period of time commensurable with the time for heating said point. The cooling time is selected in relation to the material thickness and the thermophysical properties thereof according to a condition of producing the cut having the predetermined depth.