基于激光焊接封边的真空平板玻璃成形机理及其界面特性

This project researches formation mechanism and interfacial characterization of the vacuum flat glass sealing by laser welding. The phenomenon of the sealing process and the effect of construction parameters on sealing is studied from the model of laser welding. The effect of laser power, spot size and welding speed on the sealing influence rules with fuzzy comprehensive appraisal theory, and optimizing the matching relation between each process parameters and their influence rules. The influencing mechanism on sealing properties of the vacuum flat glass was researched. The heat conduction model of mobile laser beam is built.The shape feature and flow characteristic of welding pool during the rapid heating process with mobile laser beam is anlyazed. The change rule of microstructure in the vacuum flat glass joints is revealed, and the numerical computation of laser welding model is running. The effect of reflection absorption of small hole's hole wall on laser energy transmission in laser welding process and welding parameters on small hole's size, shape and stability was analyzed. The mapping relation of binding force of the vacuum flat glass on different depth seeping into glass substrate by the flux, different surface residues and different roughness of glass substrate were revealed. .All the above research will provide a theoretical and methodological basis to enrich and develop the vacuum plate glass design and manufacturing technology ,and has important theoretical and practical significance.

本项目研究激光焊接封边制备真空平板玻璃的成形机理和界面特性，从激光焊接模型入手，分析封边过程中出现的现象，研究激光焊接工艺参数对封接成形的影响；用模糊综合评价理论研究激光功率、光斑大小、焊接速度等工艺参数对封接成形的影响规律，优化各工艺参数和它们之间的匹配关系，研究其对真空玻璃封边各项性能的影响机制；建立运动激光束加热的热传导模型，分析运动激光束快速加热过程中焊接区熔池的形状特征和流动特征，揭示真空平板玻璃接头微观结构的变化规律，并对热传导模型进行数值计算；分析小孔孔壁的反射吸收在激光焊接过程中对激光能量传输的作用和影响，探讨焊接工艺参数对小孔尺寸、形状和稳定性的影响，揭示玻璃基材不同表面残留物及不同粗糙程度对激光焊接后焊剂渗入玻璃基材的深度以及不同深度对真空玻璃结合力的映射关系。本项目研究，将为丰富和发展真空平板玻璃设计及制造技术提供理论和方法基础，具有重要的理论意义和现实意义。

本项目研究激光焊接封边制备真空平板玻璃的成形机理和界面特性，从激光焊接模型入手，分析封边过程中出现的现象，研究激光焊接工艺参数对封接成形的影响；用模糊综合评价理论研究激光功率、光斑大小、焊接速度等工艺参数对封接成形的影响规律，优化各工艺参数和它们之间的匹配关系，研究其对真空玻璃封边各项性能的影响机制；建立运动激光束加热的热传导模型，分析运动激光束快速加热过程中焊接区熔池的形状特征和流动特征，揭示真空平板玻璃接头微观结构的变化规律，并对热传导模型进行数值计算；分析小孔孔壁的反射吸收在激光焊接过程中对激光能量传输的作用和影响，探讨焊接工艺参数对小孔尺寸、形状和稳定性的影响，揭示玻璃基材不同表面残留物及不同粗糙程度对激光焊接后焊剂渗入玻璃基材的深度以及不同深度对真空玻璃结合力的映射关系。本项目研究，将为丰富和发展真空平板玻璃设计及制造技术提供理论和方法基础，具有重要的理论意义和现实意义。