| 摘要 |
The present disclosure provides stamping apparatus for stamping a blank. The stamping apparatus includes a first die and a blank-holding ram. The first die includes a forming cavity and a depression positioned outboard of the forming cavity. The depression is defined by a first corner proximate the forming cavity and a second corner distal the forming cavity in the outboard direction from the first corner and the forming cavity. The blank-holding ram includes a bead configured to engage a portion of the blank into the depression when the blank is positioned between the first die and the blank-holding ram. The bead includes a third corner proximate the forming cavity and a fourth corner surface distal the forming cavity in the outboard direction from the third corner. The first corner of the depression includes a radii of curvature greater than a radii of curvature of the second corner of the depression and the radii of curvature of the third and fourth corners of the bead. |
