Anyone have the formulas for tonage for a stamping die handy? I need to
start on the design of a two stage, progressive blanking and forming
die for a project, but don't have my handbook or die design book where
I can get to them right now. I know my material, the hole diameters and
the total length of the part perimeters. What I need to do now is
calculate the press tonage so that we can start the search for a press.

Craig C.