Optimization of laser welding quality at corners based on power tracking control

YAO Liangzhen; YIN Yisheng; ZHANG Chengrui; ZHOU Litao; LIU Riliang

doi:10.12073/j.hjxb.20220519001

TRANSACTIONS OF THE CHINA WELDING INSTITUTION > 2023 > 44(5): 102-108. > DOI: 10.12073/j.hjxb.20220519001

YAO Liangzhen, YIN Yisheng, ZHANG Chengrui, ZHOU Litao, LIU Riliang. Optimization of laser welding quality at corners based on power tracking control[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 2023, 44(5): 102-108. DOI: 10.12073/j.hjxb.20220519001

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Optimization of laser welding quality at corners based on power tracking control

YAO Liangzhen^{1, 2,},
YIN Yisheng^{1, 2, ,},
ZHANG Chengrui^{1, 2},
ZHOU Litao^{1, 2, 3},
LIU Riliang^{1, 2}

1.
Key Laboratory of efficient and clean machinery manufacturing, Ministry of education, Shandong University, Jinan, 250061, China
2.
National experimental teaching demonstration center of mechanical engineering, Shandong University, Jinan, 250061, China
3.
Shanghai Gaize Laser Technology Co., Ltd, Shanghai, 201600, China

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Received Date: May 18, 2022
Available Online: April 11, 2023

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Abstract

Abstract

Considering energy accumulation caused by acceleration, deceleration, and overlapping spots in corner laser welding, a power tracking control strategy based on temporal-spatial dimensions that accounts for welding specific energy and energy density distribution was developed to control energy distribution and optimize welding quality at corners. Using MATLAB, the heat input of laser welding and the energy density distribution at the corner were analyzed, and the relation between laser power and welding speed was optimized. Using the galvo laser welding control system developed by the team, 3003 aluminum alloy was tested to optimize corner welding quality under different corner conditions. The experimental results show that the power tracking control strategy based on temporal-spatial dimensions can effectively improve welding surface morphology at the corner and ensure weld seam homogeneity, helping inhibit defects at the corner and improve overall weld seam quality without affecting penetration depth.
- laser welding,
- weld corner,
- energy distribution,
- power regulation

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References (15)

References

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Optimization of laser welding quality at corners based on power tracking control