Patent ID: 6564605
Filing Date: 2003-05-20
Classification: B21D,Y10S,Y10T

Abstract:
An electromagnetic forming apparatus for forming an essentially planar metal plate into a dish having a three-dimensional pattern, the apparatus comprising:a mold having a forming surface with a contour corresponding to said three-dimensional pattern, and having edges corresponding to boundaries of the dish, which edges are defined by side walls essentially perpendicular to the forming surface; a forming coil device opposite and proximal to said forming device, and extending peripheral to said edges, the plate being accommodated between said forming coil and said forming surface; and an electric discharge circuitry for discharging a short and intense electric current pulse through the forming coil device to yield a pulsed magnetic forming (PMF) force for deforming said plate, wherein the forming surface of the mold has a central concave portion defining and serving as a template for a central concave portion of the dish, the central concave portion being provided with ducts for release of gasses, and wherein said ducts are connected to a vacuum source for the removal of gasses from the depression.