Sheet metal: Trouble converting pipe "y" to 5/16" plate

[Anonymous]

https://a360.co/3yaw5cU

I'm having trouble with a pipe "y". When I thicken the lower part of the "y" and then try to convert it i get this error message. " Can't calculate body thickness. Select the base face of a valid sheet metal body.  Any Guidence would be appreciated.

Thank You

[ryan.bales]

There are two reasons it normally would not convert:

1. Non uniform material thickness
2. Closed/self intersecting object 

The main upper part of the body will convert, but it would never be able to unfold or create a flat pattern as its a closed object with no foldable surfaces or edges.

That being said, you need to do some surface modeling work to get the lower part to be a solid, so that it will convert to a solid first. 

1. First reverse normal on the bodies that are flipped the opposite way
2. Second stitch all four surface bodies together
3. Thicken the faces the correct direction
4. use Solid combine to combine the bodies. 
5. Convert to sheet metal (just note again, this is not a 'valid' sheet metal object in fusion and next to nothing with sheet metal tools will work) 

[ryan.bales]

File attached/

[TheCADWhisperer]

Are you interested in seeing the correct solution with 3 Flat Patterns and no unresolved issues highlighted in the Timeline?

Do you have a preference where you would like to see the Rips (seams), otherwise I will use shortest Rip solutions for each component.

[Anonymous]

Yes that would be very helpful.

[TheCADWhisperer]

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@Anonymous wrote:

Yes that would be very helpful.

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I added a request for additional information about the desired Rip location to previous response.

[Anonymous]

The shortest seams

[TheCADWhisperer]

Here is my attempt.

Because it is not a true conic - I was not able to get it to convert to sheet metal in Fusion 360.

[TheCADWhisperer]

I discovered that my Sweep did not result in a planar surface (required), but I am not confident that fixing that error would resolve the issue of obtaining a FlatPattern of the Lofted faces.  But that is where I would spend my time and effort.