• ICALEO 2013 Paper #702 (Cax Process Chain for Laser Drilling of Tool Molds)

    Cax Process Chain for Laser Drilling of Tool Molds
    Authors:
    Hermann Uchtmann, Chair for Laser Technology of the Rwth Aachen University; Aachen Germany
    Ingomar Kelbassa, Chair for Laser Technology of the Rwth Aachen University; Aachen Germany
    Presented at ICALEO 2013

    Rotation sintering, also known as slush molding, is used to manufacture molded skins, such as cockpit or door interior panels for cars. At present, approx. 80 percent of molded skins are manufactured using electroforms due to the complex free-form surfaces, and surface structures such as leather graining. The manufacture of these electroforms is time-consuming and expensive. The aim is to replace conventional electrofor...

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  • ICALEO 2013 Paper #701 (Determination of the Bore Hole Diameter by Analyzing Process Emissions)

    Determination of the Bore Hole Diameter by Analyzing Process Emissions
    Authors:
    Stefan Janssen, Chair for Laser Technology, RWTH Aachen University; Aachen Germany
    Hermann Uchtmann, Chair for Laser Technology, Rwth Aachen University; Aachen Germany
    Ingomar Kelbassa, Chair for Laser Technology, Rwth Aachen University; Aachen Germany
    Presented at ICALEO 2013

    In order to guide cooling air through turbine blades, bore holes with 500-800 microns diameter need to be drilled into the blades. The tolerance of the bore hole diameter must not exceed a range of about 10-30 microns so that a constant air flow capacity can be guaranteed. For the determination of the bore hole diamet...

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  • ICALEO 2013 Paper #605 (Butt Welding of Transparent Polyamide (Pa11) with 1.94 Micron Fiber Laser)

    Butt Welding of Transparent Polyamide (Pa11) with 1.94 Micron Fiber Laser
    Authors:
    Petri Laakso, VTT; Lappeenranta Finland
    Saara Ruotsalainen, Vtt; Lappeenranta Finland
    Veli Kujanpaa, Vtt; Lappeenranta Finland
    Gerhard Otto, Fhg Ilt; Aachen Germany
    Alexander Olowinsky, Fhg Ilt; Aachen Germany
    Presented at ICALEO 2013

    Laser welding of polymeric products has been manufactured for more than 20 years. During that time polymer welding has developed a lot. In spite of that, there are still some limitations in applying the process to the industry. Typically welding has been made in lap joint configuration with black and clear parts because of optical ...

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  • ICALEO 2013 Paper #604 (Quasi-Simultaneous Laser Welding of Transparent Polymers by Using Beam Off-Setting Scanning Technique)

    Quasi-Simultaneous Laser Welding of Transparent Polymers by Using Beam Off-Setting Scanning Technique
    Authors:
    Saara Ruotsalainen, VTT Technical Research Centre of Finland; Lappeenranta Finland
    Petri Laakso, Vtt Technical Research Centre of Finland; Lappeenranta Finland
    Veli Kujanpaaa, Vtt Technical Research Centre of Finland; Lappeenranta Finland
    Presented at ICALEO 2013

    Quasi-simultaneous laser welding (QSLW) of polymers is widely known laser joining technique. Traditionally joining of polymers has been done by using lasers of around 1 µm wavelength. With this wavelength the pair of polymers to be joined needs to be transparent and absorbing, usually clear and b...

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  • ICALEO 2013 Paper #603 (Laser Transmission Welding of White Thermoplastics with Adapted Wavelengths)

    Laser Transmission Welding of White Thermoplastics with Adapted Wavelengths
    Authors:
    Viktor Mamuschkin, Fraunhofer Institute for Laser Technology ILT; Aachen Germany
    Mirko Aden, Fraunhofer Institute for Laser Technology; Aachen Germany
    Christoph Engelmann, Fraunhofer Institute For Laser Technology; Aachen Germany
    Alexander Olowinsky, Fraunhofer Institute for Laser Technology; Aachen Germany
    Arnold Gillner, Fraunhofer Institute for Laser Technology; Aachen Germany
    Sibylle Glaser, Treffert GmbH & Co. KG; Bingen-Sponsheim Germany
    Presented at ICALEO 2013

    Since its introduction transmission welding continuously gained importance and o...

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  • ICALEO 2013 Paper #602 (Laser-Based Joining of Three-Dimensional Thermoplastic Parts and Thermoplastic Aluminium Hybrids)

    Laser-Based Joining of Three-Dimensional Thermoplastic Parts and Thermoplastic Aluminium Hybrids
    Authors:
    Martin Devrient, Bayerisches Laserzentrum Gmbh; Erlangen Germany
    Philipp Amend, Bayerisches Laserzentrum Gmbh; Erlangen Germany
    Michael Schmidt, University of Erlangen-Nuremberg, Chair of Photonic Technologies; Erlangen Germany
    Presented at ICALEO 2013

    Today in many industries stringently implemented lightweight construction causes increasing demand for efficient procedures to join thermoplastics as well as hybrid structures made out of thermoplastics and metals. Eligible techniques are laser transmission welding and laser-based hot-melt bonding. By means of laser ...

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  • ICALEO 2013 Paper #601 (Laser Joining of Endless Long Fiber Reinforced Thermoplastics with Aluminum)

    Laser Joining of Endless Long Fiber Reinforced Thermoplastics with Aluminum
    Authors:
    Martin Stambke, Ilmenau University of Technology; Ilmenau Germany
    Jean Pierre Bergmann, Ilmenau University of Technology; Ilmenau Germany
    Benedikt Ruhdorfer, Ilmenau University of Technology; Ilmenau Germany
    Presented at ICALEO 2013

    Lightweight design constructions are dominated by a mix of various materials, whereas aluminum and steel alloys play an important role especially for series production with high unit numbers. Plastics and especially fiber reinforced plastics offer a very high potential for lightweight design constructions. Thus they gain more and more importance especially ...

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  • ICALEO 2013 Paper #505 (The Novel Technology for Thick Glass Cutting with Small Power Laser Saw)

    The Novel Technology for Thick Glass Cutting with Small Power Laser Saw
    Authors:
    Chao Huang, Institute of Laser Engineering; Beijing Peoples Republic of China
    Shi Bai, Beijing University of Technology; Chaoyang, Beijing Peoples Republic of China
    Jimin Chen, Beijing University of Technology; Chaoyang, Beijing Peoples Republic of China
    Presented at ICALEO 2013

    Usually when cutting thicker material we need higher power laser during laser cutting. If we use a saw to cut the situation will be different. In this paper we report a novel technology for thick glass cutting with a small power laser saw. The laser saw is made of 532nm green laser with long pulse width 1ms. It is ...

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  • ICALEO 2013 Paper #504 (Analysing the Temperature Distribution at the Cutting Front and Inside the Cutting Kerf During Co2-Laser Cutting of Aluminium)

    Analysing the Temperature Distribution at the Cutting Front and Inside the Cutting Kerf During Co2-Laser Cutting of Aluminium
    Authors:
    Michael Jarwitz, IFSW, University of Stuttgart; Stuttgart Germany
    Rudolf Weber, Ifsw, University of Stuttgart; Stuttgart Germany
    Thomas Graf, Ifsw, University of Stuttgart; Stuttgart Germany
    Presented at ICALEO 2013

    In laser cutting the cut quality strongly depends on the removal of the molten material from the cutting kerf. The physical properties of the molten layer, which are temperature dependent, and the gas flow of the assist gas inside the cutting kerf are the main factors influencing the melt removal. Therefore the temperature d...

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  • ICALEO 2013 Paper #503 (Energy Conditions of a High-Quality Cut at the Laser-Oxygen Cutting with Fiber and Co2 Lasers)

    Energy Conditions of a High-Quality Cut at the Laser-Oxygen Cutting with Fiber and Co2 Lasers
    Authors:
    Victor Shulyatyev, Institute of Theoretical and Applied Mechanics; Novosibirsk Russia
    Alexander Golyshev, Institute of Theoretical and Applied Mechanics; Novosibirsk
    Alexander Malikov, Institute of Theoretical and Applied Mechanics; Novosibirsk Russia
    Anatoly Orishich, Institute of Theoretical and Applied Mechanics, Russian Academy of Sciences, Sib; Novosibirsk Russia
    Presented at ICALEO 2013

    The fiber laser is a promising beam source for metal cutting. The modern level of research and practical application, however, enables to conclude that the fiber l...

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