Welding with high power fiber lasers – A preliminary study

Quintino, L.; Costa, André Pontes da; Miranda, Rosa Maria Mendes; Yapp, D.; Kumar, Vikash; Kong, Chen

doi:10.1016/j.matdes.2006.01.009

Cited by 283 publications

(112 citation statements)

References 6 publications

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“…The melting efficiency is the energy required to melt a unit volume of material. So the heat input and the power density are determinant when controlling the weld bead profile and the depth of penetration [39].…”

Section: High Energy Density Beamsmentioning

confidence: 99%

Welding and Joining of NiTi Shape Memory Alloys: A Review

Oliveira

Miranda

Fernandes

2017

Progress in Materials Science

253

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Section: High Energy Density Beamsmentioning

confidence: 99%

Welding and Joining of NiTi Shape Memory Alloys: A Review

Oliveira

Miranda

Fernandes

2017

Progress in Materials Science

253

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“…Energy is easily transferred through fiber optical cables. The fiber laser welding method, on the other hand, has advantages of lower beam distortion rate, flexible beam distribution, lower maintenance cost, higher efficiency and high quality welded joints [17]. In contrast to traditional welding methods, laser welding provides control over heat input, making it possible to achieve the desired metallurgical properties and mechanical strength levels in welded joints of the Ti6Al4V alloy.…”

Section: Materials and Welding Processmentioning

confidence: 99%

Robotic Nd:YAG Fiber Laser Welding of Ti-6Al-4V Alloy

Köse

Karaca

2017

Metals

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Abstract:In the present study, Ti6Al4V titanium alloy plates were joined using a robotic fiber laser welding method. The laser welding process was carried out at two different welding speeds. Effects of different heat input conditions on the microstructure and mechanical properties of robotic fiber laser welded joints were investigated. Some grain coarsening was observed in the microstructure of weld metal in samples joined using high heat input, compared to those using low heat input, and volume rates of primary α structures increased in the weld metal. The microstructure of weld metal in samples joined using low heat input was made of basket-weave or acicular α' grains and primary β grains in grain boundaries. Tensile and yield strength of samples joined using low heat input were higher than for those joined using high heat input, but their ductility was lower.

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“…The tolerance is typically a fraction of the focus diameter in the lateral direction and a fraction of the Rayleigh length (focus depth) in the axial direction [12]. Since modern fibre or disk lasers have a high-quality beam [13,14], the corresponding positional accuracy must typically be smaller than 0,1 mm. Therefore, conventional visual robot teaching (with the naked eye) is both inaccurate and time consuming.…”

Section: Introductionmentioning

confidence: 99%

Automatic teaching of a robotic remote laser 3D processing system based on an integrated laser-triangulation profilometry

et al. 2017

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Original scientific paper One of the key challenges in robotic remote laser 3D processing (RL3DP) is to achieve high accuracy for the laser's working trajectory relative to the features of the workpiece. This paper presents a novel RL3DP system with an automatic 3D teaching functionality for a precise and rapid determination of the working trajectory which comprises a robot manipulator, 3D scanning head, fibre laser and an off-axis positioned camera. The 3D measurement is based on laser triangulation with laser-stripe illumination using the laser's pilot beam and scanning head. The experimental results show that the system has a precision better than 70 µm and 120 µm along lateral and vertical direction respectively inside the measuring range of 100 × 100 mm. The teaching time is 30-times shorter compared to a visual teaching procedure. Therefore, such a system can lead to large cost reductions for modern production lines that have constant changes to the products' geometries and functionalities. Keywords: edge detection; laser triangulation; remote laser processing; robot teaching; three-dimensional measurement Automatsko učenje robotskih laserskih daljinskih 3D obradnih sustava na osnovu laserske triangulacijeIzvorni znanstveni članak Jedan od bitnih izazova u daljinskoj laserskoj 3D obradi (RL3DP) je postizanje visoke točnosti jer laser radi po rubovima predmeta koji obrađuje. Ovaj rad prikazuje novi RL3DP sustav s automatskom 3D nastavnom funkcionalnošću radi točnog i brzog određivanja prijenosa detektiranih rubova koje obrađuje robot sa 3D skenerom, fiber laserom i izvan aksijalno pozicioniranom kamerom. 3D skeniranje se bazira na laserskoj triangulaciji sa pilotskom laserskom trakom. Eksperimentalni rezultati pokazuju da sustav ima preciznost bolju od 70 µm i 120 µm u bočnom i vertikalnom smjeru u mjernom području od 100 × 100 mm. Vrijeme učenja je 30-puta kraće u odnosu na vizualni postupak. Stoga, takav sustav može značajno smanjiti troškove obrade sa modernim proizvodnim sistemima koji se moraju prilagođavati stalnim promjenama geometrije i funkcionalnosti proizvoda.

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Welding with high power fiber lasers – A preliminary study

Cited by 283 publications

References 6 publications

Welding and Joining of NiTi Shape Memory Alloys: A Review

Welding and Joining of NiTi Shape Memory Alloys: A Review

Robotic Nd:YAG Fiber Laser Welding of Ti-6Al-4V Alloy

Automatic teaching of a robotic remote laser 3D processing system based on an integrated laser-triangulation profilometry

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