Weld pool shape observation in high power laser beam welding

Artinov, Antoni; Bakir, Nasim; Bachmann, Markus; Gumenyuk, Andrey; Rethmeier, Michael

doi:10.1016/j.procir.2018.08.043

Cited by 20 publications

(5 citation statements)

References 10 publications

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“…Thus, one possible reason of this deviations could be the different heat diffusion phenomena along the sheets that takes place in welds with different thicknesses. While few experimental observations of the molten pool are available in previous studies like the one by Artinov et al [24], several published numerical results indicates that the width of the molten pool is usually larger (transversal direction), as shown by Zhan et al [15], and longer (longitudinal direction), as shown by Artinov et al [25], on the weld top rather on the bottom, contrary to what was found in this work (Fig. 8c).…”

Section: Numerical Resultscontrasting

confidence: 85%

Thermal Finite Element Modelling of the Laser Beam Welding of Tailor Welded Blanks through an Equivalent Volumetric Heat Source

Busto

Coviello

Lombardi

et al. 2021

Preprint

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In last decades, several numerical models of the keyhole laser welding process were developed in order to simulate the joining process. Most of them are sophisticated multiphase numerical models tempting to include all the several different physical phenomena involved. However, less computationally expensive thermo-mechanical models that are capable of satisfactorily simulating the process were developed as well. Among them, a moving volumetric equivalent heat source, whose dimensions are calibrated on experimental melt pool geometries, can estimate some aspects of the process using a Finite Element Method (FEM) modelling with no need to consider fluid flows. In this work, a double-conical volumetric heat source is used to arrange a combination of two half hourglass-like shapes with different dimensions each other. This particular arrangement aims to properly assess the laser joining of a Tailor Welded Blank (TWB) even in case of butt joint between sheets of different thicknesses. Experiments of TWBs made of 22MnB5 steel sheets were conducted in both equal and different thicknesses configurations in order to validate the proposed model. The results show that the model can estimate in a satisfactory way the shape and dimensions of the fused zone in case of TWB made of sheets with different thickness.

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Section: Numerical Resultscontrasting

confidence: 85%

Thermal Finite Element Modelling of the Laser Beam Welding of Tailor Welded Blanks through an Equivalent Volumetric Heat Source

Busto

Coviello

Lombardi

et al. 2021

Preprint

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show abstract

“…Artinov et al observe the weld pool geometry by means of a high-speed camera and an infrared camera recording. The observations show that the dimensions of the weld pool vary depending on the depth [63]. Further sensor combinations like that of blending electrical signals and highspeed photography have been shown to lead to defect detection during laser welding [64].…”

Section: A Hybrid Data Collectionmentioning

confidence: 96%

Development of an Intelligent Quality Management System for Micro Laser Welding: An Innovative Framework and Its Implementation Perspectives

Hoz

Cheng

2021

Machines

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Laser micro-welding manufacturers face substantial challenges in verifying weldment quality, as the industry and applications are requiring increasingly the miniaturization and compactness of products. The problem is compounded by new stringent demands for personalized products at competitive, low costs and the highest quality levels. High-pressure equipment manufacturers, in particular, rely on ISO 3834:2021 to assure and demonstrate best welding practices but also to manage risks associated with liability issues. ISO 3834:2021, like all conventional quality management systems, offers a one-dimensional, quasi-static overview of welding quality that may fail to deal with these new challenges and underlying complexities required to deal effectively with process variability. This paper presents a framework for welding companies to integrate horizontally their suppliers and customers with their processes and products, which are also integrated vertically in the context of Smart Manufacturing or Industry 4.0. It is focused on the development of a smart quality management system for intelligent digitization of all company manufacturing and business processes. Furthermore, an innovative data-based welding quality management framework is described for laser micro-welding applications and their implementation perspectives. The research is driven by an inductive methodology and based on a seamless integration of engineering-oriented heuristic and empirical approaches that is appropriate for intelligent and autonomous quality management, given the lack of research in this niche, but increasingly important topic area.

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“…On the other hand, the numerical simulations need detailed validation through experimental work. Hereto, one current approach is to use camera observations of the weld pool flow through a lateral quartz glass [47][48][49] not exclusively for electromagnetic application and analysis. In the end, it is an interaction between the two approaches, which leads to enhanced analysis options.…”

Section: Synthesismentioning

confidence: 99%

High-power laser beam welding for thick section steels – new perspectives using electromagnetic systems

Rethmeier

Gumenyuk

Bachmann

2021

Science and Technology of Welding and Joining

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In recent years, it was shown that the introduction of additional oscillating and permanent magnetic fields to laser beam and laser-arc hybrid welding can bring several beneficial effects. Examples are a contactless weld pool support for metals of high thickness suffering from severe drop-out when being welded conventionally or an enhanced stirring to improve the mixing of added filler material in the depth of the weld pool to guarantee homogeneous resulting mechanical properties of the weld. The latest research results show the applicability to various metal types over a wide range of thicknesses and welding conditions. The observations made were demonstrated in numerous experimental studies and a deep understanding of the interaction of the underlying physical mechanisms was extracted from numerical calculations.

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Weld pool shape observation in high power laser beam welding

Cited by 20 publications

References 10 publications

Thermal Finite Element Modelling of the Laser Beam Welding of Tailor Welded Blanks through an Equivalent Volumetric Heat Source

Thermal Finite Element Modelling of the Laser Beam Welding of Tailor Welded Blanks through an Equivalent Volumetric Heat Source

Development of an Intelligent Quality Management System for Micro Laser Welding: An Innovative Framework and Its Implementation Perspectives

High-power laser beam welding for thick section steels – new perspectives using electromagnetic systems

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