中国激光, 2018, 45 (11): 1102011, 网络出版: 2018-11-15
基于热导机制的光纤激光焦点高频旋转点焊工艺 
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Fiber Laser High-Frequency Focus Rotation Spot Welding Process Based on Thermal Conductivity
图 & 表
图 2. 焊点形貌及熔池表面状态随焊接时间的变化。(a) 0.037 s;(b) 0.2 s;(c) 0.4 s;(d) 0.6 s;(e) 1.0 s;(f) 1.8 s
Fig. 2. Spot weld morphology and molten pool state versus welding time. (a) 0.037 s; (b) 0.2 s; (c) 0.4 s; (d) 0.6 s; (e) 1.0 s; (f) 1.8 s
图 4. 焦点旋转频率对焊点形貌的影响。(a) 30 Hz; (b) 50 Hz;(c) 70 Hz;(d) 90 Hz;(e) 110 Hz
Fig. 4. Influence of focus rotation frequency on spot weld morphology. (a) 30 Hz; (b) 50 Hz; (c) 70 Hz; (d) 90 Hz; (e) 110 Hz
图 6. 两种点焊方式下焊点质量随激光功率的变化。(a)宽深比;(b)气孔倾向
Fig. 6. Spot weld quality versus laser power under two spot welding processes. (a) Width-depth ratio; (b) porosity repression
图 7. 传统激光点焊焊点的显微组织。(a)熔合线区;(b)柱状晶区;(c)中心等轴晶区
Fig. 7. Microstructure of spot weld under traditional laser spot welding process. (a) Fusion line zone; (b) columnar grain zone; (c) centered equiaxed zone
图 8. 焦点旋转点焊焊点的显微组织。(a)熔合线区;(b)柱状晶区;(c)中心区域
Fig. 8. Microstructure of spot weld under focus rotation spot welding process. (a) Fusion line zone; (b) columnar grain zone; (c) central zone
表 1不同工艺参数下传统激光点焊焊点形貌
Table1. Spot weld morphologies by traditional laser spot welding under different process parameters
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彭书胜, 邹江林, 李新桐, 武强, 肖荣诗. 基于热导机制的光纤激光焦点高频旋转点焊工艺[J]. 中国激光, 2018, 45(11): 1102011. Peng Shusheng, Zou Jianglin, Li Xintong, Wu Qiang, Xiao Rongshi. Fiber Laser High-Frequency Focus Rotation Spot Welding Process Based on Thermal Conductivity[J]. Chinese Journal of Lasers, 2018, 45(11): 1102011.
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