Design optimization and eigenfrequency tuning of ultrasonic oscillator of one-dimensional longitudinal vibration at high temperature for laser welding

Liu, Zuguo; Jin, Xiangzhong; Zhang, Junyi; Hao, Zhongjia; Li, Junhao

doi:10.1007/s00170-021-08530-0

Cited by 6 publications

(2 citation statements)

References 51 publications

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“…Liu et al [15] presented a comprehensive investigation into enhancing the efficiency of ultrasonic vibration-assisted laser welding through the optimisation of an ultrasonic oscillator's design and eigenfrequency tuning. The optimisation aims at mitigating the effects of high-temperature-induced eigenfrequency drift in ultrasonic systems, a common challenge during ultrasonic-assisted laser welding due to the heat transfer from the welding process.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigation of the Use of Ultrasonic Waves to Assist Laser Welding

Salimi,

Teyeb,

Elmasri

et al. 2024

Preprint

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This study explores the use of remote ultrasound vibration to enhance welding strength. It examines the effects of 20 kHz, and 40 kHz High Power Ultrasound Transducers (HPUT) in contact and contactless modes during ultrasonic assistance laser welding. Employing shear tests and microscopy for assessment, the research evaluates ultrasound's impact on welding strength and identifies the optimal transducer. Theoretical and numerical analyses investigate vibration transmission into the welding area, particularly examining the vibration distribution and cavitation initiation within the molten pool area. Results indicate that ultrasound-assisted welding increases pull test performance, including the resistance force and strain, and improves microscopic structural integrity. Numerical simulations suggest that narrow-band vibration intensifies pressure in specific welding zones. Contactless ultrasound application also shows enhanced welding quality, offering a promising alternative to current methods. This work contributes to electric car technology by suggesting improvements in welding techniques for power battery systems.

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Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigation of the Use of Ultrasonic Waves to Assist Laser Welding

Salimi,

Teyeb,

Elmasri

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…Liu et al [ 21 ] presented a comprehensive investigation into enhancing the efficiency of ultrasonic vibration-assisted laser welding through the optimisation of an ultrasonic oscillator’s design and eigenfrequency tuning. The optimisation aims at mitigating the effects of high-temperature-induced eigenfrequency drift in ultrasonic systems, a common challenge during ultrasonic-assisted laser welding due to the heat transfer from the welding process.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigation of the Use of Ultrasonic Waves to Assist Laser Welding

Salimi,

Teyeb,

El Masri

et al. 2024

Materials

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This study evaluates the enhancement of laser welding using ultrasonic waves aimed at reorganising the intermetallic position in such a fashion that leads to increased mechanical properties of welds in battery pack assemblies for electric vehicles. The experiment employed 20 kHz and 40 kHz High-Power Ultrasound Transducers (HPUTs) in both contact and contactless modes. A simplified experimental configuration is suggested to represent conditions similar to those found in electric vehicle battery pack assemblies. Measurements of vibration transmission to aluminium alloy 1050 plates revealed more than a 1000-fold increase in acceleration amplitude in contact mode compared to contactless mode. The 20 kHz transducer in contactless mode demonstrated superior performance, showing a 10% increase in load and 27% increase in extension compared to welding without ultrasonic assistance. On the other hand, the 40 kHz transducer, while still improved over non-ultrasonic methods, showed less pronounced benefits. This suggests that lower-frequency ultrasonic assistance (20 kHz) is more effective in this specific context. The study explores ultrasonic assistance in laser welding copper (Cu101) to aluminium alloy 1050 using 20 kHz and 40 kHz HPUTs, showing that both transducers enhance microstructural integrity by reducing copper homogenisation into aluminium, with the 20 kHz frequency proving more effective in this context. A numerical simulation was conducted to evaluate the transmission of pressure into the molten pool of the weld, correlated with the vibration results obtained from the 20 kHz transducer. The numerical simulation confirms that no cavitation is initiated in the molten pool area, and all improvements are solely due to the ultrasonic waves.

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Tool wear status monitoring under laser-ultrasonic compound cutting based on acoustic emission and deep learning

Zhang,

Wang,

Cao

et al. 2024

J Mech Sci Technol

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Design optimization and eigenfrequency tuning of ultrasonic oscillator of one-dimensional longitudinal vibration at high temperature for laser welding

Cited by 6 publications

References 51 publications

Experimental and Numerical Investigation of the Use of Ultrasonic Waves to Assist Laser Welding

Experimental and Numerical Investigation of the Use of Ultrasonic Waves to Assist Laser Welding

Experimental and Numerical Investigation of the Use of Ultrasonic Waves to Assist Laser Welding

Tool wear status monitoring under laser-ultrasonic compound cutting based on acoustic emission and deep learning

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