is based on the localized plastic deformation of the blank under the action of a punch tool which follows a continuous and numerically controlled path.
Basic equipment includes a clamping system for the blank, the punch tool and a CNC system (milling machine, robot) to move the tool along the programmed path.
The current progress of the INMA project has been presented on the 3rd EASN Association Workshop on Aerostructures held on October 9th – 11th, 2013 in Milan. In particular, general information of the project aim and goals were presented which were followed by a more detailed description of the achieved results. The full presentation is available for download here. Last but not least, during the workshop three demonstrators displaying the underlying technologies for titanium shaping of the project were displayed.
The INMA project was present at the Farnborough International Airshow held on July 14th – 20th, 2014 at Farnborough, UK. A number of parts displaying the progress of the developed technologies were exhibited. In addition, the project banner was displayed and the project leaflets were distributed by TWI who participated in this event.
TWI has managed the delivery of Work Package 5, where advanced technological support was provided to the development of the hot AISF system. TWI’s work had started with a feasibility study on hot AISF localised heating methods, where it was concluded that using laser heating is the optimum choice. This was followed by state-of-the-art laboratory experiments on grade 5 titanium heating by laser. Experiments were undertaken in conjunction with numerical simulations, which have resulted in a validated laser heating model for the localised hot AISF process.
As the INMA consortium made more progress, TWI has engaged with several project partners in the development of localised hot AISF experiments. TWI has managed and delivered a life cycle study on hot AISF procedures. Working with IBF and Tecnalia on localised and global heating experiments, TWI analysed the technological challenges, in addition to economic and environmental impacts. The study concluded that localised heating is the lean option for the hot AISF process, despite the drawback of geometric inaccuracy resulting from high residual stress. TWI has assessed the residual stress field, and further provided insights for future research on making the localised hot AISF a reliable technology.