Han Xue, Zhao Yu, Zou Jianglin, Xiao Rongshi, Zhao Le. Analysis of Plume Formation Reasons in Laser Deep Penetration Welding Based on Visual Observation[J]. Chinese Journal of Lasers, 2020, 47(6): 602004
- Chinese Journal of Lasers
- Vol. 47, Issue 6, 602004 (2020)
Fig. 1. Schematics of experimental devices. (a) Bead-on-plate welding experiment; (b) “sandwich” welding experiment
Fig. 2. Typical plume shape
Fig. 3. Variation of swing angle of the bottom swing plume with time
Fig. 4. Variation of narrow plume rising speed with time
Fig. 5. Morphology of keyholes and plumes at different time
Fig. 6. Variation of plume tilt angle and bright spot depth of the front wall of the keyhole with the time
Fig. 7. Keyhole shape in “sandwich” welding experiment
Fig. 8. Plume shape under different defocusing amounts
Fig. 9. Keyhole size before and after plume removal under different defocusing amounts
Fig. 10. Percentage increase of penetration after plume removal at different defocusing amounts
Fig. 11. Typical keyhole shape and “sandwich”welding keyhole shape
Fig. 12. Schematic of narrow plume formation
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