Forming by Locally Varying Vaporizing Actuators
- Sonderverfahren
- Umformtechnische Grundlagenforschung
- Technologieentwicklung
Funding | German Research Foundation (DFG) |
Project | 391967465 |
Contact | Marlon Hahn M. Sc. |
The expansive pressure evolving during a capacitor bank discharge over thin aluminum foils (actuators) within just a few microseconds was used for flexible sheet metal forming. The project focused on the development and experimental validation of a multi-physical modeling and simulation procedure for this novel process. The aim was to be able to provide a predictive process design as well as to deepen the process understanding. For this, different combinable approaches were chosen, depending on effort and complexity (decreases in descending order in the table below), respectively. Especially the non-linear electrical properties of the foil actuator over the solid, liquid, and gaseous state and the strain rate-dependent flow stress of the blank material (1 mm thick DC01 steel, see figure) had to be taken into account. As approximate result, part-individual vaporization pressure distributions were identified and practically realized through adjusting the machine parameters, the foil circuitry, and its geometry.