Abstract
Single-point incremental forming (SPIF) is a quite new sheet-forming process which offers the possibility to deform complex parts without dedicated dies using a single-point tool and a standard three-axis CNC machine. The process mechanics enables higher strains with respect to traditional sheet-forming processes, but particular attention must be given to the maximum forming angle. In this paper, a new approach is proposed to enhance the material formability through a localized sheet heating as a consequence of the friction work caused by elevated tool rotational speeds. AA1050-O, AA1050-H24, and AA6082-T6 were utilized, and the reached temperatures were recorded by thermocouples, fixed to the sheet using a metal structure. A significant increase in the material formability was observed for both materials, and new formability curves have been built at the varying of the utilized rotational speed.
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Buffa, G., Campanella, D. & Fratini, L. On the improvement of material formability in SPIF operation through tool stirring action. Int J Adv Manuf Technol 66, 1343–1351 (2013). https://doi.org/10.1007/s00170-012-4412-9
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DOI: https://doi.org/10.1007/s00170-012-4412-9