Laminated glass has a wide range of applications, but the cutting process is too cumbersome. In this paper, a novel laser composite separation method was proposed to separate the laminated glass by one time and simplify the cutting process from five steps to two steps for the first time by skillfully combining laser-induced thermal-crack propagation and laser thermal melting. This method generated three laser foci, and each laser focus is acting on one layer of laminated glass. Then, the composite mechanism combining laser-induced thermal-crack propagation for glass layers and laser thermal melting separation for PVB layer was realized to separate entire laminated glass. The experiments of separating laminated glass with thickness of 5 + 0.38 + 5 mm were carried out by laser composite separation successfully, and the separation side wall was very smooth (roughness of glass layer reached 10.24 nm) without any separation defects such as chipping, micro-cracks or subsurface damage. A mathematical model was also established to analyze the separation mechanism.

中文翻译：

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巧妙结合激光诱导热裂纹传播与激光热熔法高效分离夹层玻璃的研究

夹层玻璃应用范围广，但切割工艺过于繁琐。本文提出了一种新型的激光复合分离方法，将激光诱导热裂纹传播与激光热熔结合，首次将夹层玻璃一次分离，将切割过程从五步简化为两步。这种方法产生了三个激光焦点，每个激光焦点作用在一层夹层玻璃上。然后，实现了玻璃层的激光诱导热裂纹传播和PVB层的激光热熔分离相结合的复合机制，以分离整个夹层玻璃。激光复合分离法成功进行了厚度为5±0.38±5mm的夹层玻璃分离实验，分离侧壁非常光滑（玻璃层粗糙度达到10.24 nm），没有任何分离缺陷，如碎裂、微裂纹或亚表面损伤。还建立了数学模型来分析分离机理。