Parameter influence on the laser weld geometry documented by the matrix flow chart

Karlsson, Jan; Markmann, Christoph; Alam, Md. Minhaj; Kaplan, Alexander

doi:10.1016/j.phpro.2010.08.043

Cited by 10 publications

(3 citation statements)

References 9 publications

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“…Aiming to secure a product's geometry quality, Jareteg et al (2014) gathered all activities that related with a product's variation in manufacturing and calculated its insensitivity to variation during a product's development. To present the data and relationship between weld geometry characteristics/parameters and influencing characteristics, Karlsson et al (2010) developed a matrix flow chart and interrelationship matrix and it is a generalized and easy way. In addition, Madrid et al (2015) systematically described how a product's performance was affected by the variation that occurs throughout its own fabrication process, then identified what factors or parameters that controlling the transformation process of product characteristics and finally determined the causes why variation occur.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive identification of aircraft coordination feature based on complete importance modeling and its engineering application

Guo

Zou

Liu

et al. 2018

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Purpose Coordination feature (CF) is the information carrier in dimension and shape transfer process in aircraft manufacturing. The change of its geometric size, shape, position or other attributes would affect the consistency of accumulated errors between two or more assemblies. To identify these “key characteristics” that have a close relationship with the assembly precision, a comprehensive method was developed under digital manufacturing environment, which was based on importance calculation. The multi-hierarchy and multi-station assembly process of aircraft products were also taken into consideration. Design/methodology/approach First, the interaction and evaluation relationship between components at different manufacturing stages was decomposed with a hierarchical net. Second, to meet coordination accuracy requirements, with the integrated application of Taguchi quality loss function, accuracy principal and error correction coefficient H, the quality loss between target features and candidate features at adjacent assembly hierarchies were calculated, which was based on their precision variation. Third, the influence degree and affected degree of the features were calculated with DEMATEL (decision-making trial and evaluation laboratory) method, and the concepts of centrality degree index and cause degree index were proposed for calculating the complete importance degree to eventually identify the CFs. Findings Based on the proposed methodology, CFs, affecting the skin profile and the flush coordination accuracy, were successfully identified at different assembly hierarchies to a certain type of wing flap component. Originality/value Benefit results for the engineering application showed that the deviation of skin profile was more accurate than before, and the tolerance was also closer to the centerline of required assembly precision range. Moreover, the stability in the assembly process was increased by 26.9 per cent, which could bring a higher assembly quality and an enhancement on aircraft’s flight performance.

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Section: Introductionmentioning

confidence: 99%

Comprehensive identification of aircraft coordination feature based on complete importance modeling and its engineering application

Guo

Zou

Liu

et al. 2018

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“…The work of Karlsson et al (9)(10)(11)(12)(13) for example, investigated the influence of laser welding parameters on the weld seam geometry of high strength steels welded with 15 kW fibre laser and it was found that increasing the welding speed can suppress root sagging and undercuts while decreasing the welding speed can suppress lack of penetration. Manonmani et al (14) studied the effect of laser power, welding speed and beam incidence angle on the weld seam geometry in terms of the penetration depth, the bead width and the area of penetration of a 2.5 mm thick AIS1304 stainless steel.…”

Section: Introductionmentioning

confidence: 99%

Parametric optimisation and microstructural analysis on high power Yb-fibre laser welding of Ti–6Al–4V

Ahn

Chen

Davies

et al. 2016

Optics and Lasers in Engineering

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“…Due to lowered wetting, where the temperature gradients between the melt and solid are believed to be the key, factor Pengfei, et al (2011). The rounded bottom a) b) undercut (underfill) occurs when having the laser at an unfavourable focal position, probably causing to excess evaporation, Karlsson, et al (2010). The central line undercut occurs when the base material has high magnesium content, Zhu, et al (2005).…”

Section: Introductionmentioning

confidence: 99%

Undercuts in Laser Arc Hybrid Welding

Frostevarg

Kaplan

2014

Physics Procedia

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Undercuts are usually an imperfection in welding that either continuously or sporadically form, especially when welding at high speed. Efforts, usually lowering the welding speed or overfilling, are applied to avoid undercuts as they can significantly lower the fatigue properties of the welded workpiece. Undercut formation is complex and occurs by various means, mainly based on temperature and melt flow mechanisms. When having two power sources as in laser arc hybrid welding, the melt flow can be tailored to suppress undercut formation. This can be done e.g. by narrowing the width of the gouge or by optimum positioning of the power sources relative to each other. The present paper shows and explains the main reasons of various types of undercut formation. By following the herein generated guidelines, the critical welding speed during laser arc hybrid welding can be further increased, free of undercuts.

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Parameter influence on the laser weld geometry documented by the matrix flow chart

Cited by 10 publications

References 9 publications

Comprehensive identification of aircraft coordination feature based on complete importance modeling and its engineering application

Comprehensive identification of aircraft coordination feature based on complete importance modeling and its engineering application

Parametric optimisation and microstructural analysis on high power Yb-fibre laser welding of Ti–6Al–4V

Undercuts in Laser Arc Hybrid Welding

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