Evaluation of the maximum slope angle of simple geometries carried out by incremental forming process

The aim of this study is the evaluation of the maximum slope angle of frustums of pyramid and cone carried out by incremental forming and the validation of a FE code in order to have an instrument able to evaluate the limits of the process as regards to the geometry of the manufacturing product. In the specific case, afterwards the mechanical characterization and the evaluation of the sheets formability, frustums of pyramid and cone, with different slope angles, have been carried out, up to the appearance of fractures in the sheet. A FE analysis of the process has allowed to highlight the sheet zones characterized by different strains and to locate the critical points by the interpretation of the forming limit diagrams.