Laser transmission welding of dissimilar transparent thermoplastics using different metal particle absorbents

Yu, Xiaodong; Long, Qing; Chen, Yani; Liu, Yayun; Yang, Can; Jia, Qingbo; Wang, Chuanyang

doi:10.1016/j.optlastec.2022.108005

Cited by 18 publications

(3 citation statements)

References 38 publications

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“…The weld strength is highly affected by the formation of defects inside the weld seam. Yuet et al [ 28 ] investigated LTW of dissimilar thermoplastics, namely polycarbonate (PC) and PASF. Metal particles, including tin, zinc, and magnesium zinc alloy, have been employed as absorbents to enhance the optical properties of welded materials.…”

Section: Introductionmentioning

confidence: 99%

Predicting Characteristics of Dissimilar Laser Welded Polymeric Joints Using a Multi-Layer Perceptrons Model Coupled with Archimedes Optimizer

Moustafa

Elsheikh

2023

Polymers

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This study investigates the application of a coupled multi-layer perceptrons (MLP) model with Archimedes optimizer (AO) to predict characteristics of dissimilar lap joints made of polymethyl methacrylate (PMMA) and polycarbonate (PC). The joints were welded using the laser transmission welding (LTW) technique equipped with a beam wobbling feature. The inputs of the models were laser power, welding speed, pulse frequency, wobble frequency, and wobble width; whereas, the outputs were seam width and shear strength of the joint. The Archimedes optimizer was employed to obtain the optimal internal parameters of the multi-layer perceptrons. In addition to the Archimedes optimizer, the conventional gradient descent technique, as well as the particle swarm optimizer (PSO), was employed as internal optimizers of the multi-layer perceptrons model. The prediction accuracy of the three models was compared using different error measures. The AO-MLP outperformed the other two models. The computed root mean square errors of the MLP, PSO-MLP, and AO-MLP models are (39.798, 19.909, and 2.283) and (0.153, 0.084, and 0.0321) for shear strength and seam width, respectively.

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Section: Introductionmentioning

confidence: 99%

Predicting Characteristics of Dissimilar Laser Welded Polymeric Joints Using a Multi-Layer Perceptrons Model Coupled with Archimedes Optimizer

Moustafa

Elsheikh

2023

Polymers

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“…The temperature between the interfaces rises rapidly, causing the materials of the two parts to melt, spread, and form a weld under both the clamping pressure and thermal expansion. When the bottom part has low laser absorption capacity, it is common practice to enhance its absorption of laser energy by coating its surface with absorbers, such as carbon black or metal particles [7], or by mixing and injecting absorbers into the bottom part. LTW includes contour welding, quasi-synchronous welding, synchronous welding, mask welding, radial welding, etc.…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation of Laser Transmission Welding—A Review on Temperature Field, Stress Field, Melt Flow Field, and Thermal Degradation

Zuo

2023

Polymers

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Laser transmission welding (LTW) is an excellent process for joining plastics and is widely used in industry. Numerical simulation is an important method and area for studying LTW. It can effectively shorten the experimental time and reduce research costs, aid in understanding the welding mechanism, and enable the acquisition of ideal process parameters. To enhance understanding of numerical simulation studies on LTW and facilitate research in this area, this paper presents a comprehensive overview of the progress made in numerical simulation of LTW, covering the following aspects: (a) characteristics of the three heat source models for LTW temperature field simulation, including surface heat source model, volumetric heat source model, and hybrid heat source model, along with the methods, results, and applications of temperature field simulation based on these models and experimental validation; (b) numerical simulation of thermal and residual stresses based on the temperature field; (c) numerical simulation of the melt flow field; and (d) predictive simulation of material degradation. The conclusion of the review and the prospects for further research work are eventually addressed.

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“…Recently, the metal powder is selected as a novel and eco-friendly laser-absorbent to carry out LTW of thermoplastics [12,16,17]. The change in metal powder diameter affects the multiple reflections during laser-material interaction and further determines the temperature level which is essential for good welding.…”

Section: Introductionmentioning

confidence: 99%

An integrated methodology for estimating the interface temperature and effects of powder diameters in laser transmission welding process

Qiao

Chen

et al. 2023

Science and Technology of Welding and Joining

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The powder diameter affects the heat generation and further influences the quality of weldments when the MZA powder is used as laser-absorbents to carry out laser transmission welding (LTW). It is difficult to measure the temperature due to its extremely short duration. A mathematical model considering the multiple reflections of metal powder is established to predict heat generation. The mathematical model is verified and then used to describe the influence of line energy density and powder diameter on the temperature profile of the LTW process. The results demonstrate that the temperature from experiments and simulation are consistent. Therefore, the established model is suitable to predict the heat generation of metal powder laser-absorbents in the LTW process.

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Laser transmission welding of dissimilar transparent thermoplastics using different metal particle absorbents

Cited by 18 publications

References 38 publications

Predicting Characteristics of Dissimilar Laser Welded Polymeric Joints Using a Multi-Layer Perceptrons Model Coupled with Archimedes Optimizer

Predicting Characteristics of Dissimilar Laser Welded Polymeric Joints Using a Multi-Layer Perceptrons Model Coupled with Archimedes Optimizer

Numerical Simulation of Laser Transmission Welding—A Review on Temperature Field, Stress Field, Melt Flow Field, and Thermal Degradation

An integrated methodology for estimating the interface temperature and effects of powder diameters in laser transmission welding process

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