Sheet metal Unfold/Create Flat Pattern not working correctly

[tkeding]

Hello,

after changing some parameters in a sheet metal assembly, the attached part does not want to unfold correctly anymore. I tried recreating the part by making surface offset, thicken and convert to sheet metal, but that gives me the same result. Fusion seems to want to bend the wrong way, the part is oddly deformed in Flat pattern view. The part originally belonged to a bigger single sheet metal part, but I decided later that it's better to split it in several parts.... maybe that's why it behaves this way?

[davebYYPCU]

Couple of things, 

Flat Pattern is limited to one body per component, if you cut one up, new bits need to be their own component.

The curvy picture looks like uneven thickness, 

Lofted? organic? Surface parts outside a sheet metal loft, will not flatten.

Might help…..

[tkeding]

Thanks for the reply!

I had created a new component for the problematic sheet metal part, so it became a subassambly of the original sheet metal part:

Not sure if it's the right way to do it, but it worked without any problems until I changed some parameters.

The picture in the first post shows how the body deformed in Flat Pattern view. Above is the bent state, there it's totally fine, constant thickness overall and no apparent problems. The Part was originally created from 2d extrude, which then was converted to sheet metal

[davebYYPCU]

Hard to tell from pics.

Appears to have oblique edge cuts.

Take a copy offset surface body at zero, and thicken by plate thickness, if both bodies are the exact same result, then I can’t help.  

If the edge boundary is different, the new body should flatten.

Might help….

[tkeding]

I already tried the offset &thicken, see first post. In the end, I cut off the part that did not fold properly, remade the flange and copied all instances from the bent part, that did the trick to get the flat pattern work again