Posters
Come meet the poster presenters to ask them questions and discuss their work
We would like to invite you to come and see the posters at our upcoming conference. The posters will showcase a diverse range of research topics, and will give delegates an opportunity to engage with the authors and learn more about their work. Whether you are a seasoned researcher or simply curious about the latest developments in your field, we believe that the posters will offer something of interest to everyone. So please join us at the conference and take advantage of this opportunity to learn and engage with your peers in industry and the academic community.
On 9 April at 17:15, we’ll also hold the main poster session and distinguish the 7 best posters of this year’s edition with our traditional Poster Awards Ceremony. Join us at the poster area to cheer and meet the laureates, and enjoy some drinks with all poster presenters!
We look forward to seeing you there!
PO150: Robot technology for high-rate, low-cost and repeatable-quality weld profiling and automated fatigue strengt improvement of inside and outside circumferential butt welds in wind turbine support structures
Morten Flatau, Project and Market Manager, Maxars A/S
Abstract
Meeting EU Wind Charter objectives require industrial development at every stage of production and deployment of offshore wind turbines. To achieve a high fatigue performance allowing for a reduction in steel use in offshore wind turbine support structures, stress concentration features associated with submerged arc welding (SAW), must be removed or improved during production. Automated weld profiling using a CNC-robotic device is recognised as the most viable proposition for achieving high-rate, low-cost and repeatable-quality geometric improvement of circumferential butt welds in offshore wind turbine support structures in accordance with the EN1993-1-9 part of the Eurocode 3 standard and for achieving detail category (DC) 112 or higher. In partnership with research and technology organisations (RTOs) FORCE Technology and Danish Technological Institute and under a demonstration project grant awarded by Manufacturing Academy of Denmark (MADE), Maxars A/S investigated how a shift from manual grinding to CNC-robotic machining affects the material properties in butt weld seams. Manual belt and disc grinding is current state-of-the-art in weld profiling for removing weld cap material and weld toe undercuts, and increasing weld toe radius. The process is slow and quality is variable depending on operator skill. The process is also associated with high levels of both noise and dust. This project found that replacing grinding with machining affects neither the microstructure nor the hardness of the weld. As was expected, machining increases the level of tensile residual stress in the top 2-5 µm of the surface of the weld seam. After sandblasting both machined and grinded weld samples in accordance with DNV-RP-C203/NORSOK, no difference in residual stress profile could be measured. The project was undertaken for the purpose of fully characterising robot technology being developed by Maxars A/S and currently being tested in an actual production environment to reach technology readiness level (TRL) 7.
No recording available for this poster.
