• ICALEO 2009 Paper #1802 (Influence of Oxygen on Weld Geometry in Fibre Laser Welding)

    Influence of Oxygen on Weld Geometry in Fibre Laser Welding
    Authors:
    Lin Zhao, National Institute for Materials Science; Tsukuba Japan
    Susumu Tsukamoto, National Institute for Materials Science; Tsukuba Japan
    Goro Arakane, National Institute for Materials Science; Tsukuba Japan
    Tomohiro Sugino, Ihi Corp.; Yokohama Japan
    Presented at ICALEO 2009

    Oxygen can significantly increase the penetration depth in arc welding. It is caused by change in the Marangoni flow direction from outward to inward with increasing the oxygen content. Increase in the penetration depth by oxygen was also reported in laser welding by some researchers, but the mechanism is still uncl...

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  • ICALEO 2009 Paper #1801 (Cover Glass Influence on High Power Fiber Laser Induced Focus Shift)

    Cover Glass Influence on High Power Fiber Laser Induced Focus Shift
    Authors:
    Daniel Reitemeyer, BIAS - Bremer Institut fuer angewandte Strahltechnik GmbH; Bremen Germany
    Thomas Seefeld, BIAS - Bremer Institut fuer angewandte Strahltechnik GmbH; Bremen Germany
    Frank Vollertsen, BIAS - Bremer Institut fuer angewandte Strahltechnik GmbH; Bremen Germany
    Jean Pierre Bergmann, Jenoptik Automatisierungstechnik GmbH; Jena Germany
    Presented at ICALEO 2009

    The condition of the optics of a processing head is an influencing factor on the focus stability at laser beam welding with high brilliance laser beam sources. The small percentage of laser light absorbed in the o...

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  • ICALEO 2009 Paper #1709 (Three-Dimensional Texturing and Patterning of Woven Textiles using Purpose Designed Fabric Structures)

    Three-Dimensional Texturing and Patterning of Woven Textiles using Purpose Designed Fabric Structures
    Authors:
    Janette Matthews, Loughborough University; Loughborough Great Britain
    Kerry Walton, Loughborough University; Loughborough Great Britain
    John Tyrer (Presenter not author), Loughborough University; -
    Presented at ICALEO 2009

    Laser processing of textile substrates is embedded in manufacturing systems for cutting and surface patterning through marking. A number of challenges exist with the processing of natural fibres and natural fibre blends such as cashmere, lambs wool and silk. This paper shows how the response of a luxury textile may be favourably influence...

    $28.00

  • ICALEO 2009 Paper #1708 (Precision Cutting & Drilling Metals with a Fiber Laser Marker)

    Precision Cutting & Drilling Metals with a Fiber Laser Marker
    Authors:
    Hongqiang Chen, Miyachi Unitek Corporation; Pasadena CA USA
    Geoff Shannon, Miyachi Unitek Corporation; Monrovia CA USA
    Presented at ICALEO 2009

    Certain fiber laser markers with the necessary peak powers and pulse parameter flexibility offer a unique cost effective system for precision cutting and drilling. It can provide dimensional cut repeatability to sub 10 microns, cut or drill material up to 0.5mm with minimal to no burring, and offer multi axis motion options. The material removal mechanism of the new process in relation to pulse parameters is described, along with examples of high quality cutting and dril...

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  • ICALEO 2009 Paper #1707 (Study on the Characteristics of Debris and Hole Diameter in Laser Drilling of Thick Alumina Ceramics)

    Study on the Characteristics of Debris and Hole Diameter in Laser Drilling of Thick Alumina Ceramics
    Authors:
    Yinzhou Yan, Institute of Laser Engineering, Beijing University of Technology; Beijing Peoples Republic of China
    Lingfei Ji, Institute of Laser Engineering, Beijing University of Technology; Beijing Peoples Republic of China
    Yong Bao, Institute of Laser Engineering, Beijing University of Technology; Beijing Peoples Republic of China
    Yijian Jiang, Institute of Laser Engineering, Beijing University of Technology; Beijing Peoples Republic of China
    Presented at ICALEO 2009

    Characterizations of debris and hole diameter on a 4.4 mm alumina ceramic which ...

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  • ICALEO 2009 Paper #1705 (Enhancing the Quality and Productivity of Laser Drilling by Changing Process Gas Parameters While Processing)

    Enhancing the Quality and Productivity of Laser Drilling by Changing Process Gas Parameters While Processing
    Authors:
    Jens Dietrich, Lehrstuhl fuer Lasertechnik; 52074 Aachen Germany
    Mihael Brajdic, Lehrstuhl Fuer Lasertechnik; 52074 Aachen Germany
    Sven Engbers, Lehrstuhl Fuer Lasertechnik; -
    Leonhard Klinkmueller, Lehrstuhl Fuer Lasertechnik; 52074 Aachen Germany
    Ingomar Kelbassa, Lehrstuhl Fuer Lasertechnik; 52074 Aachen Germany
    Presented at ICALEO 2009

    When drilling with laser radiation the choice of the process gas and the pressure must be determined as process gas parameters. Choosing the right process gas parameters in order to achieve ...

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  • ICALEO 2009 Paper #1704 (Oxide Formation in Acute Laser Percussion Drilled Holes in Single Crystal Nickel Superalloy)

    Oxide Formation in Acute Laser Percussion Drilled Holes in Single Crystal Nickel Superalloy
    Authors:
    Stephen Leigh, Manchester University; Manchester Great Britain
    Kursad Sezer, Manchester University; Manchester Great Britain
    Lin Li, Manchester University; Manchester Great Britain
    Andrew Pinkerton, -; -
    Clive Grafton-Reed, Rolls-Royce Plc; Derby Great Britain
    Martyn Cuttell, Rolls-Royce Plc; Derby Great Britain
    Presented at ICALEO 2009

    One industrial application of laser drilling is the production of cooling holes at acute angles in nickel superalloy single crystal material. However laser drilled holes are inherently associated ...

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  • ICALEO 2009 Paper #1703 (Spectroscopic Study of Inconel 718 Plasma Generated during Laser Drilling Process)

    Spectroscopic Study of Inconel 718 Plasma Generated during Laser Drilling Process
    Authors:
    Joonghan Shin, CLAIM, The University of Michigan; Ann Arbor MI USA
    Jyoti Mazumder, -; -
    Presented at ICALEO 2009

    An aero space material, Inconel 718, was laser drilled with a diode pumped solid state Nd:YAG laser. During the laser drilling process, the emission spectra of the Inconel 718 plasma have been recorded and analyzed using an optical emission spectroscopic method. After the process, the drilling depth of the holes produced at various conditions was measured by optical microscope. Temporal histories of the emission line intensity and drilling depth were obtained. The correlation, pre...

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  • ICALEO 2009 Paper #1702 (Laser Drilling in Percussion Regime: Study of the Scale Time of the Breakthrough)

    Laser Drilling in Percussion Regime: Study of the Scale Time of the Breakthrough
    Authors:
    Laurent Berthe, Laboratoire pour l'Application des lasers de Puissance (UPR CNRS 1578); Arcueil France
    Maryse Muller, Pimm/Cnrs; Paris France
    Matthieu Schneider, Pimm/Cnrs; Paris France
    Mariette Nivard, Pimm/Cnrs; Paris France
    Presented at ICALEO 2009

    The laser drilling in percussion regime consists in irradiating a target with a laser in the power density range of 10 MW/cm2 and pulse duration in ms range . The beam and the target are static. The material is heated, melted and vaporized. The drilling is produced by the removal of the liquid layer using recoil pressure...

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  • ICALEO 2009 Paper #1607 (Spectral Analysis of the Process Emission during Laser Welding of AISI 304 Stainless Steel with Disk and Nd:YAG Laser)

    Spectral Analysis of the Process Emission during Laser Welding of AISI 304 Stainless Steel with Disk and Nd:YAG Laser
    Authors:
    Ali Riza Konuk, University of Twente; Enschede Netherlands
    Ronald Aarts, University of Twente; Enschede Netherlands
    Bert Huis in't Veld, University of Twente; Enschede Netherlands
    Presented at ICALEO 2009

    Optical emissions from the laser welding process can be obtained relatively easy in real-time. Therefore it is very beneficial to establish a clear relation between characteristics of these
    emissions and the resulting weld quality or the occurrence of welding defects for any of the laser types currently applied in industry. Most commonly use...

    $28.00

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