LIA NEWS
modern high-brilliance beam sources can be considerably extended with regard to their usable welding speed. Benefits are therefore economic as well as qualitative. Due to these advantages, it can be expected
Figure 6. Typical welding application in gearbox manufacturing
cross section shows a very narrow and homogeneous weld seam with a penetration depth of 4mm. Tis outstanding weld quality is absolutely not possible when welding under atmospheric conditions.
Te investigations presented here clearly show
that welding at reduced pressure with solid-state lasers offers an enormous potential for a quality improvement in regards to spattering and weld seam properties. Te application limits of
that, in the next few years, the procedure – in particular in applications with the highest requirements on seam quality and low spattering – will be introduced into the market. During the current project period, the advantages of laser welding at reduced pressure have been transferred into the industry to such an extent that customers are inquiring about components welded with this procedure.l
Christian Börner and Klaus Dilger are with the Institute of Joining and Welding in Braunschweig, Germany.
ICALEO 2015: World’s laser industry meets for the premier conference in Atlanta
the conference had more than 400 attendees from 22 different countries, and 200 presentations and posters highlighting the latest breakthroughs in laser research and development. ICALEO provided those that attended the opportunity to learn about advances in laser material processes and networking opportunities with scientists, engineers and researchers from across the globe. It is no surprise that ICALEO is the most important laser materials processing conference in the world. Silke Pflueger, general manager of Direct
T
Photonics, and the current serving ICALEO Congress General Chair, led both the opening and closing plenaries of ICALEO. In the opening plenary, Pflueger pointed out that, for the first time in ICALEO’s history, an all-women panel of presenters introduced the newest addition to the ICALEO programme – biomedical applications of lasers. Te new informative session on this laser technology focused on what lasers are currently doing to better our health and the potential benefits that can be associated with their use in the future. Keynote speaker Dr Ellen Townes-Anderson, one of four daughters of laser pioneer and Nobel Prize winner Professor Charles Townes, led the way with her research involving the use of laser tweezers.
36 LASER SYSTEMS EUROPE ISSUE 29 • WINTER 2015
he 34th International Congress on Applications of Lasers and Electro-Optics (ICALEO) took place 18-22 October at the Sheraton Atlanta Hotel in Georgia. Tis year
Te ICALEO Laser Microprocessing (LMF)
conference presentations emphasised important topics such as applications in microelectronics and photovoltaic material processing, as well as areas of surface engineering and laser processing of substrate and cover materials such as glass and sapphire. Some of the notable presentations that took place during this conference were: ‘Te magic of nonlinear laser processing: shaping multi- functional lab-in-fibre’, by Peter Herman; ‘Use of diffractive optic for high power laser cutting’, by Paul Hilton; and ‘High average power, high energy fibre delivery and temporal compress ion of ultrafast pulses’, by Eric Mottay. ICALEO’s Laser Materials
Processing (LMP) conference highlighted powerful presentations on developing technologies that expand the boundaries of laser processing with stronger lasers, innovative hybrid processes, and remarkable laser applications. A large portion of this conference focused on welding and surface modification, including cladding and coating. Laser assisted machining, or 3D printing, was also represented at the conference. Contributors to the LMP conference travelled from 22 countries and four continents to attend. Some of the LMP conference presentations
the conference with a plenary session discussing two types of revolutionary lasers
Pflueger closed
highpoints were: ‘Te research status and development of laser shock peening’, by Wenwu Zhang; ‘Inline monitoring of laser processing – new industrial results with the low coherence interferometry sensor approach’, by Markus Kogel-Hollacher; and ‘Experimental investigation of direct diamond laser cladding in combination with high speed camera-based process monitoring’, by Christian Scheitler. Te Nanomanufacturing conference of ICALEO presented ideas and research in emerging nanomanufacturing technologies in 3D micro/nanofabrication, laser spectroscopy and metrology, laser synthesis and diagnostics of carbon nanomaterial, epitaxial growth of graphene for optoelectronics, nanolithography, nanoscale
thermal imaging, biophotonics, nanostructured surface coating, laser sintering, and laser surface texturing. Some of the notable presentations at the
ICALEO Nanomanufacturing conference were: ‘Laser processing for production of lithium-ion batteries’, by Wilhelm Pfleging; ‘Ultrafast laser hybrid fabricating of macro-micro-nano- nanowire multi-scale structures for near perfect infrared antireflection’, by Minlin Zhong; and
@lasersystemsmag |
www.lasersystemseurope.com
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