YAG laser cutting soda-lime glass with controlled fracture and volumetric heat absorption |
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| Authors: | LJ Yang Y Wang ZG Tian N Cai |
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| Affiliation: | 1. Key Laboratory on High Power Laser and Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Qinghe Road 390, Shanghai 201800, China;2. Fraunhofer Institute for Laser Technology, Steinbachstraße 15, 52074 Aachen, Germany;3. Nonlinear Dynamics of Laser Processing, RWTH Aachen University, Steinbachstraße 15, 52074 Aachen, Germany;1. HiLASE Centre, Institute of Physics ASCR, Za Radnicí 828, 25241 Dolní B?e?any, Czech Republic;2. Institute of Thermophysics SB RAS, 1 Lavrentyev Ave., Novosibirsk 630090, Russia;3. Institute of Computational Technologies SB RAS, 6 Lavrentyev Ave., 630090 Novosibirsk, Russia;4. Novosibirsk State Technical University, 20 Karl Marx Ave., 630073 Novosibirsk, Russia;5. NCLA, NUI Galway, Galway, Ireland;1. LEPABE-Laboratory for Process Engineering, Environment, Biotechnology and Energy, Faculdade de Engenharia, Universidade do Porto, rua Dr. Roberto Frias, 4200-465 Porto, Portugal;2. INEGI-Institute of Science and Innovation in Mechanical and Industrial Engineering, Faculdade de Engenharia, Universidade do Porto, rua Dr. Roberto Frias, 4200-465 Porto, Portugal |
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| Abstract: | As a volumetric heat source, YAG laser can penetrate through the glass, and has many advantages in cutting of glass with controlled fracture compared with CO2 laser cutting of glass. This work lays great emphasis on studying the technique of YAG laser cutting of multi-layer glasses. This paper indicates the experiments of YAG laser cutting of two-layer and four-layer soda-lime glasses with controlled fracture. Optical microscope photographs of the separation surface are obtained to examine the surface quality. The impact of laser power, scanning speed and laser beam size on the cutting quality is studied and the optimum processing parameters are presented in the paper. A theoretical model of a thermal laser shock method for separation of two-layer glasses is developed, and the fracture propagation mechanism is studied by examining the temperature and stress fields using finite element software ANSYS. In YAG laser cutting of multi-layer glasses, the temperature distribution is uniform across the thickness of the glass and the fracture propagates from the top and bottom surface to middle so that better separation surface quality can be acquired and multi-layer glasses can be cut simultaneously. |
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