Laser-based manufacturing concepts for efficient production of tailor welded sheet metals

Spöttl, Marius; Mohrbacher, Hardy

doi:10.1007/s40436-014-0088-8

Cited by 18 publications

(10 citation statements)

References 2 publications

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“…4). For the stainless steel, two-sided welding or "turbo-weld" [8] with beam wobbling mode with the same parameters was used; it is due to very high thermal distortion of that type of steel [1] that welding was done without use of shielding gas. Usually, stainless steels have a high level of thermal distortion; it is explained by phase and structural transition processes.…”

Section: Methodsmentioning

confidence: 99%

“…In addition, hybrid laser welding is used for dissimilar materials, like Fe-Al joint [7], bifocal laser beam welding "turbo-weld" for specimen with different thicknesses [8].…”

Section: Introductionmentioning

confidence: 99%

“…Original laser welding of thick and long plates requires final preparation, alignment, fixation, and welding process control. This problem can be solved using twin spot laser technique with filler wire or hybrid arc-laser welding [6][7][8][9][10][11][12][13][14], but it will decrease the welding speed. One of the ways to solve this problem is the use of a laser beam wobbling mode.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The effect of laser beam wobbling mode in welding process for structural steels

Kuryntsev

Gil'mutdinov

2015

Int J Adv Manuf Technol

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A laser welding process using a 30-kW fiber laser with scanning mode optics is investigated in the paper. Welding is conducted in two ways: constant laser beam trajectory and wobbling trajectory with the use of lower speed and power. The main goal was to investigate the influence of the second wobbling laser welding pass on microstructure and mechanical properties of structural steel. The following parameters were monitored: visual control and mechanical properties (microhardness, three-point bend, and Charpy impact Vnotch test); metallographic analysis and 2D and 3D computer tomography (CT) were also done. The results show that after the second welding pass, with wobbling trajectory of laser beam, middle and cap parts of the seam have a lower microhardness, in relation to the root part. It can be explained by annealing influence of the second wobbling pass at weld metal.

show abstract

Section: Methodsmentioning

confidence: 99%

“…In addition, hybrid laser welding is used for dissimilar materials, like Fe-Al joint [7], bifocal laser beam welding "turbo-weld" for specimen with different thicknesses [8].…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The effect of laser beam wobbling mode in welding process for structural steels

Kuryntsev

Gil'mutdinov

2015

Int J Adv Manuf Technol

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“…Another requirement is that the laser diameter (about 0.4 mm) be two times larger than the gap to avoid defects. To reach positioning requirements, laser cutting, precision die blanking, or edge preparation are commonly used for linear welding [7]. To avoid the filling problem in butt-joint configurations, filler metal in the form of wire or powder can be used in conjunction with laser welding.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation of Laser Welding Process in Butt-Joint Configurations

Jacques¹,

Ouafi²

2017

WJET

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This paper presents an experimental investigation of laser welding low carbon galvanized steel in butt-joint configurations. The experimental work is focused on the effects of various laser welding parameters on the welds quality. The investigations are based on a structured experimental design using the Taguchi method. Welding experiments are conducted using a 3 kW Nd:YAG laser source. The selected laser welding parameters (laser power, welding speed, laser fiber diameter, gap between sheets and sheet thickness) are combined and used to evaluate the variation of four weld quality attributes (bead width, penetration depth, underfill and hardness) and to identify the possible relationship between welding parameters and weld physical and geometrical attributes. The effects of these parameters are studied using ANOVA to find their contributions to the variation of different weld characteristics. Plots of the main effects and the interaction effects are also used to understand the influence of the welding parameters. The results reveal that all welding parameters are relevant to bead width (BDW) and depth of penetration (DOP) with a relative predominance of laser power and welding speed. The effect of laser fiber diameter on penetration depth is insignificant. Typical gap-dependent weld shapes show that a small gap results in a narrower and deeper weld. Due to the standard sheared edge, an underfill between 5% and 10% occurs for no-gap experiments. The resulting hardness values are relatively similar for all the experimental tests.

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“…Most common arc welding is mainly used, which has a number of disadvantages for these steels: high coefficient of heat input, low speed, and large heat-affected zone [5,6]. All these factors lead to high level of residual stress, thermal deformations, use of thermal and mechanical treatment after welding, and reduction of corrosion resistance of the weld metal [1,[7][8][9].…”

Section: Introductionmentioning

confidence: 99%