Applying a new method for incremental sheet metal forming with high speed

Résumé

Recently, incremental sheet metal forming (ISMF) process as one of the new methods in rapid prototyping (RP) collection has been attended by researchers. This process based on defined path in CNC machine controller and applying a head-spherical tool, supplies the required force for sheet metal forming. Despite affirmation of process ability in forming of symmetric geometries, some of their aspects such as: high cost in die design and its manufacturing (specially in two point incremental forming process), high cost in using of CNC machine tools and long time for forming, are as process constraints. Hereupon and acquitting of above constraints, the new method for incremental sheet metal forming on turning machine has been presented. This process without needing to die and using a headspherical tool stated in tool-holder turret forms the sheet metal in symmetric geometries and in possible shortest time. In continues, with a view to increasing of sheet formability in this process, two types of forming strategies were designed and executed. In final, the best forming strategy based on final forming depth and effective strain calculations was introduced.