You can make an air bending die in a few minutes: get 3 peices of
cold rolled rod about 4 times the dimeter of the stock, weld 2
peices to the flat of a piece of bar stock about 1-1/2 diameters
apart, the other rod to the edge of another bar, press away.

Charles A. Sherwood wrote:
I would like to make an accessory for my 3 ton arbor press for bending
thin stock. Basically I need a V block and a wedge attached to the ram.
I have tried using a standard V block which works ok for messing around.

I think I need a V block that is actually a bit less than 90 degrees
so I can over bend enough to compensate for the spring back. So the
first question is how much less than 90? The second question is how
to make it? Cutting a 87 degree angle seems a bit tricky with a mill.
The only idea I can come up with it to rough it out with a bandsaw and
then use the shaper to cut the sides.

chuck