Single point incremental sheet forming (SPIF) faces the problem of low geometric accuracy, which is related to the selected tool path. To analyze the influence of the tool path, seven different path strategies were generated using a custom-developed program. Explicit FEM simulations of forming DC04 steel were performed in the Abaqus environment, evaluating the final shape deviations and bottom twist. We found that bi-directional path strategies significantly improve the bottom twist angle of the part. The lowest geometric deviation for isotropic and anisotropic materials, as well as the lowest bottom twist for anisotropic material, is achieved by the bi-directional profile path with diagonally distributed increments, which simultaneously requires the longest processing time. The lowest bottom twist angle for isotropic material, however, is achieved by the bi-directional profile path with a straight downward step.
|
