By Vjaceslav Avilov, André Schneider, Marco Lammers, Andrey Gumenyuk, Michael Rethmeier A well-known problem of partial penetration laser beam welding is keyhole-tip instability representing the main source of porosity – gas bubbles leave the keyhole near its tip. The second important problem of keyhole mode laser welding is very intensive thermocapillary (Marangoni) convection in the upper […]
Laser Welding
Novel Fusion Welding Technology of Si/Glass Using Ultrashort Laser Pulses with High Pulse Repetition Rates
By I. Miyamoto, Y. Okamoto, A. Hansen, T. Amberla, J. Vihinen, J. Kangastupa Silicon/glass is one of the most widely used material combinations for sensing and actuating microsystems and micro electronic technologies. Anodic bonding has been most widely used for Si/glass bonding since its invention in 1969, because of its excellent mechanical properties and process […]
The Difference Between Fiber Lasers and Fiber Delivered Lasers
By Tony Hoult Nobody would disagree that real change is occurring in the laser industry. In the broadest context, what is happening is a shift from the conventional technique of assembling lasers using free space optical components to a technique based on splicing together fiber based components. It is now very widely accepted that this […]
Laser Welding: The Spatter Map
Alexander F. H. Kaplan and John Powell Luleå University of Technology, Dept. Applied Physics and Mechanical Engineering, Sweden Welding defects have to be suppressed to maintain the mechanical strength of a product under load. For suitable choice of the process parameters operating windows can be entered where a certain welding defect can be suppressed. However, […]
Welding Zinc Coated Steels: New Joint Design and Strategy with Scanner Technology
By: Klaus Loeffler, Dr. Tim Hesse, Peter Kaupp TRUMPF Laser und Systemtechnik GmbH, Ditzingen, Germany TRUMPF Werkzeugmaschinen GmbH, Ditzingen, Germany The existing problems of weld defects in welding zinc coated steels in a overlap situation are present in the automotive industry. Overlap joints are the most common type of joint geometry used in the automotive […]