Tight radius bending

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Subject Author Date
Tight radius bending mkr5000 04-14-2008
Posted by Jim Wilkins on April 14, 2008, 12:19 pm
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> I'd like to bend some 050 or 063 aluminum in a "U" shape -- about 2.5"
> deep and perhaps a 3/8 to 1/2" radius.
> I do have a finger brake but don't see how I can creatively use it, or
> even a vice etc.

Give this a try on some practice material;

Bend one thin strip well past a right angle, then back up the fingers
by its thickness and bend a second one over it, then repeat etc. I've
only done this with two strips plus the work so I don't know how far
you can go. This also works on the vertical press brake on a 3-in-1
combo machine but the narrow lower die limits the maximum radius.

Jim Wilkins

Posted by Ned Simmons on April 14, 2008, 12:33 pm
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wrote:


>I'd like to bend some 050 or 063 aluminum in a "U" shape -- about 2.5"
>deep and perhaps a 3/8 to 1/2" radius.
>

If you're doing enough to justify the effort, something like this
would work. I used dowel pins for their hardness and good surface
finish, but was bending Inconel wire with that particular jig. Mild
steel would last a long time working aluminum.

http://www.suscom-maine.net/~nsimmons/news/ArborPressBrake01.jpg
http://www.suscom-maine.net/~nsimmons/news/ArborPressBrake02.jpg



--
Ned Simmons

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