Analysis and comparison of laser cutting performance of solar float glass with different scanning modes
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RESEARCH ARTICLE
Wenyuan LI, Yu HUANG, Youmin RONG, Long CHEN, Guojun ZHANG, Zhangrui GAO
Analysis and comparison of laser cutting performance of solar float glass with different scanning modes
© Higher Education Press 2020
Abstract Cutting quality and efficiency have always been important indicators of glass laser cutting. Laser scanning modes have two kinds, namely, the spiral and concentric circle scanning modes. These modes can achieve high-performance hole cutting of thick solar float glass using a 532-nm nanosecond laser. The mechanism of the glass laser cutting under these two different scanning modes has been described. Several experiments are conducted to explore the effect of machining parameters on cutting efficiency and quality under these two scanning modes. Results indicate that compared with the spiral scanning mode, the minimum area of edge chipping (218340 µm2) and the minimum Ra (3.01 µm) in the concentric circle scanning mode are reduced by 9.4% and 16.4% respectively. Moreover, the best cutting efficiency scanning mode is 14.2% faster than that in the spiral scanning mode. The best parameter combination for the concentric circle scanning mode is as follows: Scanning speed: 2200 mm/s, number of inner circles: 6, and circle spacing: 0.05 mm. This parameter combination reduces the chipping area and sidewall surface roughness by 8.8% and 9.6% respectively at the same cutting efficiency compared with the best spiral processing parameters. The range of glass processing that can be achieved in the concentric circle scanning mode is wider than that in the spiral counterpart. The analyses of surface topography, white spots, microstructures, and sidewall surface element composition are also performed. The study concluded Received March 2, 2020; accepted July 1, 2020 Wenyuan LI, Yu HUANG, Youmin RONG, Long CHEN,
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Guojun ZHANG ( ) State Key Laboratory of Digital Manufacturing Equipment and Technology, Huazhong University of Science and Technology, Wuhan 430074, China; School of Mechanical Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, China E-mail: [email protected] Zhangrui GAO HG Farley Laserlab Cutting Welding System Engineering Co., Ltd., Wuhan 430223, China
that the concentric circle scanning mode shows evident advantages in the performance of solar float glass hole cutting. Keywords laser cutting, solar float glass, scanning mode, surface quality, cutting efficiency
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Introduction
Solar float glass is a type of glass that reduces iron content on the basis of soda-lime glass and is widely used in architecture, medical, automotive, and flat panel display industries [1]. This type of glass is intensively used in the photovoltaic industry due to its excellent transmittance [2], and many researchers focus on how to achieve highefficiency and high-quality processing. The scoring and breaking method is still the current mainstream glass processing method, which initially produces a scratch on the glass surface using a hard metal tool, such as a diamond cutter, and t
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