"Wwj2110" wrote in message
...
Im looking for info on predicting springback of 6061-T6 aluminum.
Specifically I want to know the punch radius for a part with a 1.08 r.
Also I
need the springback factor for bending a 90 degree angle with a .18 r at
the
bend.

It's been over thirty seconds (20 years) since bashing aluminum into
compound irregular shapes... but I think t-6 must be annealed first in order
to get any shape change at all. So you soften the 6061 and keep it frozen
until brought to the forge. Then you smash it to shape with no springback at
all because it's mush. When it sits for a few days it regains its
strength... I think.

Wayne