I want to make a blanking die to use in my hydraulic press to cut
multiples out of annealed 26 gauge grade 1 titanium from Reactive
Metals. I’ve attempted to make the die out of 22 gauge annealed grade
1 titanium from RM. I got a nice clean cut in copper, but the die
mostly embosses the titanium, with some cut-through. Since the
titanium die is still annealed, I believe that the shearing edge may
be simply distorting under pressure (I hear the “crunch” of the
shearing action at about 1k psi, but take it on up to 2k psi). I’d
appreciate recommendations: 1) should I attempt to work-harden the
shearing edge? If so, how to do that in titanium without distorting
the die? 2) should I try to use grade 2 ballistic titanium for the
die (Reactive Metals doesn’t carry it in sheet, so sourcing may be a
problem)? 3) should I make the die out of another material, such as
vanadium-steel alloy or another steel alloy that will cut titanium
without my having to harden and temper the shearing edge? Suggestions
on other alloys? Regular O-1 tool steel dies distort when cutting
titanium, but I haven’t tried hardening and tempering the shearing
edge-not sure how to do it, actually, without affecting the entire
die.
Thanks!
Emie Stewart