rolling sheet metal

[Anonymous]

i want to roll a rectangle  of sheet metal but it needs to have a 1" overlap how do i go about doing this 

[TheCADWhisperer]

Model Flange in finished form.

Attach your attempt here.

[chrisplyler · Accepted solution]

Please watch the following video I made for you. I know, I know, it's too long, but just watch it.

Note how I set up my sketch, and later change it to control the things I want controlled in the way I want them controlled. Note that I set my sheet metal thickness to 1/8", and then matched the overlap spacing with an extra thousandth to prevent self-intersecting geometry. Note how I messed with the exact length of the overlap by controlling an angle, such that the corner of the underlapping end wouldn't intersect the inside radius of the overlapping end's bend.

You'll see me get warnings/errors, mostly based on the fact that my dimensions would result in self-intersecting geometry. So I use a bit of trial and error to get what I want. Notice how I change from a Side1 flange to a Side2 flange, to get the outside diameter I want, and then adjust the other values to correct for the geometry change.

https://knowledge.autodesk.com/community/screencast/c1ba777b-73d2-47a5-afcd-664f59eebda4

[chrisplyler]

PS - I forgot to mention some of the basics...

1. The flange tool will fail if it would produce any self-intersecting geometry. I guess I already covered that.

2. In order to get a workable flat pattern, Fusion requires at least one flat face from which to unfold. In other words, you can't just sketch curves, create a flange from them, and expect to get a flat pattern. I used a straight line where the diameter changes between the main cylinder and the overlap. This results in that small section being a flat flange, and I pick that flat face when I make the flat pattern. The rest of the curved flanges "unfold" from there.