高功率光纤激光焊接羽辉的动态特征及其对焊接过程的影响机制

The high-power fiber laser welding technology is one of the commanding heights of the advanced manufacturing technology, and has garnered extensive attention in vehicle manufacturing, defense weapon, aerospace and other industries. Developing high-power fiber laser welding technology confirms with the national strategic development. The plume is an inherent physical phenomenon in high-power fiber laser welding, and of serious effect on the laser welding process. Recently, there are shortage of fully understanding about the plume characteristics and its effect mechanism on the welding process. The understanding and optimization of the high-power fiber laser welding process are thus restricted. In this project, the dynamic characteristics of plume and its effect mechanism on welding process are studied in theory and experiment. The comprehensive understanding of the essence plume properties is expected to be achieved. The aims of the project are: to research the high-power fiber laser welding plume dynamic characteristics, the formation mechanism of the plume, the characteristics of particles in the plume, the fluctuation mechanism of plume and the fluctuation relationship between the plume and the keyhole, the effect mechanism of plume on incident laser transmission characteristics and the welding process; to establish the corresponding observation system of the plume characteristics, the particles characteristics in plume and the effect of plume on the transmission characteristics of the incident laser, then the dynamic characteristics of plume and the interaction mechanism between the plume and the incident laser are researched. The research results can establish the theoretical foundation for the development and application of high-power fiber laser welding technology in our country.

高功率光纤激光焊接是国际先进制造技术的制高点之一，在车辆制造、国防武器、航空航天等行业获得了广泛的关注。研究和发展高功率光纤激光焊接技术符合国家的战略发展决策。羽辉是高功率光纤激光焊接过程中固有的物理现象，对焊接过程过程存在严重影响。目前对羽辉的特性及其影响焊接过程的机理认识不足，故而制约了对高功率光纤激光焊接过程的理解和优化。本项目申请人针对羽辉的动态特征及其对焊接过程的影响机理展开了深入的理论和实验研究，有望全面的认识羽辉的本质属性。项目将深入的研究羽辉的动态行为特征，羽辉的形成机理，羽辉中微粒的特性行为，羽辉的波动机制及其与小孔波动的相关性，羽辉对入射激光传输特性和焊接过程的影响机理等；构建观察羽辉特性、微粒特性和羽辉影响入射激光传输特性的实验平台，深入的研究羽辉及其与入射激光相互作用的机理，为高功率光纤激光焊接技术在我国的发展和应用奠定基础。

高功率光纤激光焊接是国际先进制造技术的制高点之一，在车辆制造、国防武器、航空航天等行业获得了广泛的关注。研究和发展高功率光纤激光焊接技术符合国家的战略发展决策。羽辉是高功率光纤激光焊接过程中固有的物理现象，对焊接过程过程存在严重影响。目前对羽辉的特性及其影响焊接过程的机理认识不足，故而制约了对高功率光纤激光焊接过程的理解和优化。本项目申请人针对羽辉的动态特征及其对焊接过程的影响机理展开展深入的理论和实验研究。项目深入的研究了羽辉的动态行为特征，羽辉的形成机理，羽辉中微粒的特性行为，羽辉的波动机制及其与小孔波动的相关性，羽辉对入射激光传输特性和焊接过程的影响机理等；构建了观察羽辉特性、微粒特性和羽辉影响入射激光传输特性的实验平台。深入的研究了羽辉及其与入射激光相互作用的机理，有望为高功率光纤激光焊接技术在我国的发展和应用奠定基础。