On Thu, 24 May 2012 16:37:37 -0700 (PDT), MrFightGuy
wrote:

On May 24, 5:45*pm, "Jim Wilkins" wrote:
"MrFightGuy" wrote in message

...

Hey all:

I'm wondering what it will take to put a 2-3 inch curve in a 21 to
24-
inch wide sheet if 1/8 inch thick 7075-T6 aluminum....

Nathan

Saw off a narrow strip and experiment.

Isn't 6061 good enough?

jsw

Nope. I've made swords out of 6061, and my 7075 swords pulverize them
with little effort. It's gotta be 7075 so that the shields can stand
up to the beating that my swords dish out. And no, I can't start
making swords out of 6061. It just doesn't have the tensile strength
(and therefore the durability) I want in my products.

I see nobody with great knowledge answering your query. I'm not an
expert but 20 tons has to be a great plenty to press AL to the curve
you desire.

Of course if you have the dies, getting press work would be trivial
and inexpensive. My query would be how to make dies without the huge
expense of machining from billet.

Karl