关键词: 穹顶玻璃；玻璃裂片；边缘张应力

Abstract: In order to explore how to reduce the edge tensile stress of the dome glass by optimizing the design and process parameters, thus reducing the risk of cracking, the paper studies and collects the stress data of the top glass of six production models, and finds that the glass without silver plating and without black edge printing show less tensile stress. The annealing time, width of black edge and coating process are optimized, and the effectiveness of these measures is verified by experiments. The results show that extending the annealing time can slow down the cooling rate of the glass, reducing the width of the black edge helps to reduce the temperature difference, and using the cover coating rather than laser removal can reduce the stress concentration, all of these measures effectively reduce the edge stress and improve the overall safety of the glass. The research is of great significance to improve the safety and stability of electric vehicle dome glass, and provides an effective solution and theoretical basis for the material application and process optimization of dome glass in the automotive industry.

Key words: dome glass; glass cracking; edge tensile stress