Danish Stir Welding Technology, DanStir ApS, was established in Summer 2001. The installation and commissioning of the new ESAB SuperStir TM friction stir welding facility in a dedicated building complex in Brøndby near Copenhagen was completed in late Autumn.
DanStir is dedicated to offering a range of services from R&D on tool and process technology, to pre-production trials and full-scale series production as a sub-contractor. Their installation is similar to the newly commissioned friction stir welding machine at TWI, which is being used in the EuroStir project. The similarity of the two machines facilitates fully transparent operation between TWI and DanStir. Tools and welding programs are easily transferred between the two companies, which facilitates easy and simple transition from process development at TWI to full-scale series production at the company in Denmark.
The welding installation has a welding envelope of 3.4 x 15m making it one of the largest installations available worldwide for friction stir welding sub-contract work. With its 15m effective welding length, DanStir offers the opportunity for fabrication of large-scale components. Alternatively, the long envelope can be divided into dedicated welding stations, holding essentially permanent fixture configurations for key customers requiring friction stirwelding services over extended periods of time. With a down force capacity of over 100kN (10t), the facility can weld all aluminium alloys in thicknesses up to 25mm in single-pass welds. Double-sided welds are achievable in even greater thicknesses, and other materials may also be welded, with maximum thickness capability depending on alloy and temper.
DanStir is an Industrial Member of TWI and works under license to use the friction stir welding technology. With TWI as its primary source of process technology know-how, DanStir co-sponsors the Group Sponsored Project on Transport Structures and is a main collaborator in the EUREKA EuroStir project on 'European Industrialisation of Friction Stir Welding', in which the company collaborates with TWI on welding of duplex stainless steel.