• ICALEO 2009 Paper #705 (An Image-Based "Click & Weld" - Method for Laser Beam Positioning in Micro Welding Applications)

    An Image-Based "Click & Weld" - Method for Laser Beam Positioning in Micro Welding Applications
    Authors:
    Nicolaj C. Stache, Institute of Imaging & Computer Vision, RWTH Aachen Univ.; Aachen Germany
    Jonas Dieckelmann, Institute of Imaging & Computer Vision, RWTH Aachen University; Aachen Germany
    Jens Gedicke, Fraunhofer Institute for Laser Technology; Aachen Germany
    Alexander Olowinsky, Fraunhofer Institute for Laser Technology; Aachen Germany
    Til Aach, Institute of Imaging & Computer Vision, RWTH Aachen University; Aachen Germany
    Presented at ICALEO 2009

    In most laser welding applications the welding result is highly sensitive to the weld posi...

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  • ICALEO 2009 Paper #704 (Spatter Formation and Keyhole Observation with High Speed Cameras - Better Understanding of the Keyhole Formation)

    Spatter Formation and Keyhole Observation with High Speed Cameras – Better Understanding of the Keyhole Formation
    Authors:
    Philipp Gärtner, Forschungsgesellschaft für Strahlwerkzeuge; Stuttgart Germany
    Rudolf Weber, -; -
    Presented at ICALEO 2009

    Pores and spatters are a severe issue in high-brightness laser keyhole welding. An improved understanding of the process is necessary to develop means to prevent these effects. A key to understand the spatter behaviour and the keyhole formation is to observe the welding process with high speed cameras around the workpiece. Different views of the process, from above (in different angle), from below and also from the side through a glas...

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  • ICALEO 2009 Paper #703 (Trudiode: Highest Efficiency and Brilliance for Keyhole Welding)

    Trudiode: Highest Efficiency and Brilliance for Keyhole Welding
    Authors:
    Stephan Strohmaier, TRUMPF Laser GmbH + Co. Kg; Schramberg Germany
    Christoph Til Korn, Trumpf Laser Gmbh + Co. Kg; Schramberg Germany
    Klaus Loeffler, Presenter not Author; -
    Ruediger Brockmann, Trumpf Laser Gmbh + Co. Kg; Schramberg Germany
    Klaus Wallmeroth, -; -
    John L. Hostetler, TRUMPF Photonics, Inc.; - USA
    Christian Schmitz, Trumpf Inc.; Farmington USA
    Presented at ICALEO 2009

    Diode lasers have already become the most important source for applications in material processing where a limited beam quality is sufficient as they are very reliab...

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  • ICALEO 2009 Paper #702 (The Influence of Parameters on Characteristic of the Molten Pool During Laser Welding of TA15)

    The Influence of Parameters on Characteristic of the Molten Pool During Laser Welding of TA15
    Authors:
    Aiqin Duan, Bamtri; Beijing Peoples Republic of China
    Chen Li, BAMTRI; - Peoples Republic of China
    Presented at ICALEO 2009

    In this paper, the characteristics of molten pool and moving behavior during laser welding of TA15 have been studied through measuring of images. The results show that a molten pool can be roughly divided into three areas: (a)vapor/plasma area ,which fluctuates at frequency of more than 1kHz. (b) liquid area , which temperature is more than 2000K.(c) liquid-solid area ,which is main part of the pool and has small temperature gradient. The further study shows ...

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  • ICALEO 2009 Paper #701 (Design of a Sensor-assisted Control of the Weld Filling Degree for the Manufacturing of Segments for Steam Turbine Cooling)

    Design of a Sensor-assisted Control of the Weld Filling Degree for the Manufacturing of Segments for Steam Turbine Cooling
    Authors:
    Uwe Reisgen, Rwth Aachen University; Aachen Germany
    Simon Olschok, Rwth Aachen University, Isf; Aachen Germany
    Stefan Longerich, Rwth Aachen University; Aachen Germany
    Presented at ICALEO 2009

    In order to increase the efficiency of combined cycle power plants up to 65%, special structures consisting of nickel base materials are joined with and without filler materi-als using the laser beam welding method. The particular joining geometry of these structures requires bridging of the air gap during welding. For this purpose, a closed-loop co...

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  • ICALEO 2009 Paper #610 (Macro and Micro Applications for Fibre Lasers in Laser Material Processing of Aerospace Composite Material)

    Macro and Micro Applications for Fibre Lasers in Laser Material Processing of Aerospace Composite Material
    Authors:
    Paul French, Liverpool John Moores University; Liverpool Great Britain
    Mo Naeem, Gsi Group; Rugby Great Britain
    Emily Leach, Wirral Grammer School for Girls; Wirral Great Britain
    John Clowes, Fianium Ltd; Southampton Great Britain
    Martin Sharp, Liverpool John Moores University; Liverpool Great Britain
    Presented at ICALEO 2009

    The aerospace industry is showing an increased interest in composite materials. The A380, A350XWB and the Boeing 787 are using or plan to use a large percentage of composite material in their construction. ...

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  • ICALEO 2009 Paper #609 (Advanced Remote Cutting of Non-Metal Webs and Sheets)

    Advanced Remote Cutting of Non-Metal Webs and Sheets
    Authors:
    Annett Klotzbach, Fraunhofer Institute Material and Beam Technology Dresden; Dresden Germany
    Matthias Lutke, Technical University Dresden; Dresden Germany
    Andreas Wetzig, Fraunhofer Institute Material and Beam Technology Dresden; Dresden Germany
    Eckhard Beyer, Technical University Dresden; Dresden Germany
    Presented at ICALEO 2009

    Remote processing is known as a new trend to increase productivity of manufacturing processes. Even cutting of non - metals is a large area of potential Remote laser applications. The advantages of high speed and accurate cutting without any proccessing gas enable the c...

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  • ICALEO 2009 Paper #608 (Opportunities to Enlarge the Application Area of Remote - Cutting)

    Opportunities to Enlarge the Application Area of Remote - Cutting
    Authors:
    Matthias Lutke, University of Technology Dresden; Dresden Germany
    Thomas Himmer, Fraunhofer Iws; Dresden Germany
    Andreas Wetzig, Fraunhofer Iws; Dresden Germany
    Eckhard Beyer, Fraunhofer Iws; Dresden Germany
    Presented at ICALEO 2009

    Remote-cutting is an alternative method to conventional laser cutting processes when working on thin sheets. Going without any cutting gas the inertia can be reduced significantly. Deflected by two mirrors the laser beam becomes more flexible in the working envelope of the scanner. Depending on the sheet thickness cutting speeds of about 100 m/min in con...

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  • ICALEO 2009 Paper #607 (Fiber Laser Blanking of Coil Strips at Extreme Speed-Extreme-Power)

    Fiber Laser Blanking of Coil Strips at Extreme Speed-Extreme-Power
    Authors:
    Charles Caristan, Air Liquide Industrial U.S. LP; Houston TX USA
    Jay Finn, Automatic Feed Inc.; Napoleon OH USA
    Presented at ICALEO 2009

    Fiber lasers for flat bed laser cutting systems open new niche applications where users can take advantage of their high wall-plug to beam output energy efficiency, low maintenance burden, and a leaner manufacturing approach with the elimination of external beam alignment needs for set-up. The increase in output power of fiber lasers also call for the right choice in methods and machines. This paper presents developments of special optics and methods at extreme speed ext...

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  • ICALEO 2009 Paper #605 (Fiber Laser Orbital Cutting of Stainless Steel Tubes)

    Fiber Laser Orbital Cutting of Stainless Steel Tubes
    Authors:
    Tuomas Purtonen, Lappeenranta University of Technology; Lappeenranta Finland
    Antti Salminen, -; -
    Presented at ICALEO 2009

    Fiber laser cutting of metallic materials has been studied in numerous occasions for the past few years. Most of the research done in this field has been focused on one or two-dimensional vertical cutting of sheet metals. Different industrial aspects have shown an increasing interest in laser cutting of pipes. Conventional CO2-laser laser pipe cutting machines can not fulfill the requirements set for some applications. Some applications of pipe cutting are such that vertical cutting positions can n...

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