Ceilidh ... Comparison of two draws

Hydraulic Die Forming Discussion Group

Comparison of two draws

Attached is a photo showing the difference between two styles of redrawing.
Both vessels were drawn from a 6" disc of 18 gauge sterling.
The left vessel was redrawn with a bullet shaped punch through a 2.5" die.
the right vessel was redrawn with the same punch through an inversion die, in other words....it was turned inside out.
The inversion redraw (right) retains more of the punch shape with fewer pooches but more wrinkles at the edge.... the straight redraw (left) wrinkles less at the edge but pooches more and doesn't form to the punch as well.
Phil

Thu May 30