Gap-bridging During Quasi-simultaneous Laser Transmission Welding

Schmailzl, Anton; Hierl, Stefan; Schmidt, Michael

doi:10.1016/j.phpro.2016.08.113

Cited by 14 publications

(4 citation statements)

References 7 publications

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“…The simulated temperature field results were used to further design the experiment [34,35]. The mathematical model between the process parameters and the welding results was established by using the response surface methodology (RSM) [36,37], artificial neuronal networks (ANN) [38], or some other methods.…”

Section: Temperature Field Numerical Simulation Of Ltwmentioning

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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Section: Temperature Field Numerical Simulation Of Ltwmentioning

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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“…Quasi-simultaneous welding is the most flexible method, has fast cycle times and is best suited for serial production, mostly for twodimensional parts [8,9,95]. This variant is used whenever a hermetically sealed welding joint is to be obtained [119].…”

Section: Processes Used In Laser Welding Of Plasticsmentioning

confidence: 99%

Laser welding of thermoplastics: An overview on lasers, materials, processes and quality

Gonçalves

Duarte

Martins

et al. 2021

Infrared Physics & Technology

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“…In quasi-simultaneous welding, a galvanometric scanning system is used. The laser beam is moved along the welding contour multiple times at high feed rates of up to several m/s which leads to a nearly simultaneous heating of the entire welding contour [7]. The advantages compared to contour welding are the higher gap bridging ability as well as the short process time which leads to an increasing interest especially for mass production [8,9].…”

Section: Quasi-simultaneous Welding Of Absorber-free Thermoplasticsmentioning

confidence: 99%

Laser transmission welding of absorber-free semi-crystalline polypropylene by using a quasi-simultaneous irradiation strategy

et al. 2020

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Unlike other joining techniques, laser transmission welding offers unique advantages such as selective and contactless energy deposition. This enables the fabrication of flexible seam geometries at low mechanical and thermal stresses. However, the use of absorbing additives for the lower joining partner such as carbon black is crucial as most polymers are transparent in the spectral range of typical beam sources (800–1100 nm). A novel approach is the application of beam sources emitting radiation within the polymeric intrinsic absorption bands between 1500 and 2000 nm. This enables absorber-free laser welding of transparent polymers for medical or microfluidic applications such as Lab-on-a-Chip devices. The main drawback on the other hand is the large heat affected zone (HAZ) due to the volume absorption which is extending over the entire cross section. A possible way to overcome this disadvantage is a quasi-simultaneous irradiation strategy. It could be proved in the past that the HAZ of polycarbonate (PC) can be reduced in the vertical direction by up to 30% compared with contour welding. Since the effects of light scattering on the absorber-free quasi-simultaneous irradiation strategy are still unknown, the beam propagation was simulated in polypropylene (PP). Based on the results, a thermal simulation of the welding process was carried out using the finite element method (FEM). The simulation model was then evaluated by comparing the results with experimental trials.

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Gap-bridging During Quasi-simultaneous Laser Transmission Welding

Cited by 14 publications

References 7 publications

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

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

Laser welding of thermoplastics: An overview on lasers, materials, processes and quality

Laser transmission welding of absorber-free semi-crystalline polypropylene by using a quasi-simultaneous irradiation strategy

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