同轴监测激光深熔焊熔池小孔的特征分析
发布时间：2018-09-05 18:29
【摘要】：为了研究激光焊接工艺参量以及焊接材料对熔池、小孔形貌的影响,搭建了激光焊接同轴监测系统,对比研究了有无辅助光源和不同工艺条件下、采用中心波长分别为532nm和808nm窄带滤光片同轴监测的熔池、小孔图像特征。结果表明,采用808nm激光辅助光源照明和808nm窄带滤光片,可清晰地拍摄到熔池、小孔以及穿透孔特征图像;相同的工艺条件下,熔池变化小,小孔动态波动且波动幅度小,穿透孔的时变动态特征较小孔则明显不同;熔池宽度随激光功率的增加而增大,随焊接速率增大而减小;不同材料激光焊接的熔池、小孔和穿透孔的同轴监测验证了本监测系统的稳定性。该研究对激光焊接质量实时监控有理论指导意义。
[Abstract]:In order to study the influence of laser welding parameters and welding materials on weld pool and pore morphology, a laser welding coaxial monitoring system was built. The image features of melting pool and pinhole with center wavelength of 532nm and 808nm narrow-band filter were used. The results show that the characteristic images of molten pool, small hole and penetrating hole can be clearly captured by using 808nm laser assisted light source and 808nm narrow band filter, and under the same process conditions, the change of melting pool is small, the dynamic fluctuation of small hole is small, and the amplitude of fluctuation is small. The time-varying dynamic characteristics of penetrating holes are obviously different from those of small holes. The width of molten pool increases with the increase of laser power and decreases with the increase of welding rate. The stability of the monitoring system is verified by coaxial monitoring of small holes and piercing holes. The research has theoretical significance for laser welding quality real-time monitoring.
【作者单位】： 湖南大学国家高效磨削工程技术研究中心;湖南大学机械与运载工程学院;
【基金】：国家自然科学基金资助项目(51575175)
【分类号】：TG456.7
本文编号：2225098
[Abstract]:In order to study the influence of laser welding parameters and welding materials on weld pool and pore morphology, a laser welding coaxial monitoring system was built. The image features of melting pool and pinhole with center wavelength of 532nm and 808nm narrow-band filter were used. The results show that the characteristic images of molten pool, small hole and penetrating hole can be clearly captured by using 808nm laser assisted light source and 808nm narrow band filter, and under the same process conditions, the change of melting pool is small, the dynamic fluctuation of small hole is small, and the amplitude of fluctuation is small. The time-varying dynamic characteristics of penetrating holes are obviously different from those of small holes. The width of molten pool increases with the increase of laser power and decreases with the increase of welding rate. The stability of the monitoring system is verified by coaxial monitoring of small holes and piercing holes. The research has theoretical significance for laser welding quality real-time monitoring.
【作者单位】： 湖南大学国家高效磨削工程技术研究中心;湖南大学机械与运载工程学院;
【基金】：国家自然科学基金资助项目(51575175)
【分类号】：TG456.7
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