Estimated spring back while bending 5052 aluminum

[Ryoko]

I need to make a set of dies to roll form a 1" wide strip of 5052-H32 0.063" aluminum for a home project. The bend radius is 1T (0.063") and I want to bend it to 90 degrees. My understanding is that this type of aluminum is a bit springy. So if someone could give an estimate on how much spring back to expect it would be much appreciated.

 

[Baluncore]

That is a tight bend. My guess would be about 3°.
An experiment would help.
Make a simple 90° die and press a sample.
Measure the resulting angle to find the spring-back.

If there are dies for the rolls, available from a previous job, do the experiment with those.

If you press hard enough, you will coin the metal and there will be no spring back.

 

[Ryoko]

Yes, it's a pretty steep bend. I need to make a 1/4" U-channel for use as an edging trim piece. So I'll be forming both sides of a flat strip. I'd use off-the-shelf trim, but they are either the wrong material or have sharp corners which is not desired for this application. I am going to make a set of rollers on my mighty Unimat lathe. Woot! I only need to make a couple of pieces.