Based on the electric analog method for blank unfold which has already exist, a new reverse educing method about bulge-blank unfold based on equipotential field is introduced.
基于已有的电模拟坯料展开方法，提出了一种新的关于胀形件的类等势场反推坯料展开方法。
2
The reasonable shape of preform and distribution law of field variables in forming process could be obtained by equipotential field method compared to the existent electrostatic field method.