9th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes: part A benchmark problems and results and part B general papers vol:1567 pages:864-867
NUMISHEET 2014, International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes edition:9 location:Melbourne, Australia date:6-10 January 2014
Inwards bulging of the bottom is a typical geometric inaccuracy in shallow sloped Single Point Incrementally Formed (SPIF) parts. In this work, the effect of applying a localized heated spot moving synchronously with the forming tool on the geometrical accuracy of shallow sloped parts has been studied. To investigate the bulging of the bottom the results of an experimentally validated three-dimensional elasto-plastic finite element modelhave been utilized. These results have been used to identify the contact zone between the tool and the sheet, during Laser Assisted SinglePoint Incremental Forming (LASPIF) process. Moreover, a three-dimensional transient heat transfer model was formulated to identify optimum process parameters for the heating process. FE modeling results have been validated by temperature field measurements obtained from IR camera observations and a good agreement between the experimental data and the model has been observed. Based on the selected process parameters different relative positioning strategies between the tool position and the dynamically heated spot have been selected. Geometrical accuracies and the process forces have been measured and the best forming strategy has been identified accordingly.