Create support component inside a cavity of an object.

[mathew8YQJT]

Hi all, 

I'm building a wing body that currently has a hollow cavity on the inside. 

I've been able to take a 3d scan of the wing and import it as an obj into fusion. 

I need to build some supports that run the length from bottom to top of the cavity which has several curves. 

I've been able to import the obj and using sketches and solids create the bottom to top surfaces required but I cant figure out how to cut out the shape from the cavity. 

I've tried

- Mesh -> Modify -> Plane Cut

- Solid -> Modify -> split face

- Solid -> Modify -> split body

- Solid -> Modify -> split silhouette split

See the pics attached for more information.

The imported object is in orange

If anyone can tell me where Im going wrong that would be amazing.

Thank you! 

[davebYYPCU · Accepted solution]

If anyone can tell me where Im going wrong that would be amazing.

If you have to use that obj, (Yuk)

Instead of making a rib or spar oversized plate, 

Go to Mesh Environment

Create > Create Mesh Section Sketch.

Move the handles to put the sketch plane where you want it.

(You get a brown sketch outline of the Mesh body, like a section cut.)

Then Edit this sketch, use Create > Fit curves to section and trace the brown outlines as you see fit. (Finicky to use)

Move to Solid or Surface, and now normal tools work.

Using scanned and mesh objects is not an efficient way to make your stuff.

Much easier to start from scratch in Fusion.  Normal Sketches, normal tools.

Might help...

[Drewpan]

Hi,

@davebYYPCUwas the one who taught me that when modeling like this, you do not build it inside out like they do

real ones, you build it outside in from a model. What that means is that you use surfaces and extrusions to model the

outside of the model and then use commands like thicken, shell to create it as a solid. Then you use combine cut and

other tools to create the internals.

Also, for aerofoils there are tools that are add-ons for fusion that create them for you instead of scanning and

fiddling about. Eg. I can get almost any NACA aerofoil from the www.airfoiltools.com website.

A good way is set up you model as a canvas if you have one and model the outside first like this.

Once you have a solid model you can slice it up to create the insides like this.

Much easier way to model.

Cheers

Andrew

[mathew8YQJT]

Fantastic! This knowledge was exactly what I needed. 

Thank you so much for your help. 

I didn't know another way to get the internal measurements of the wing structure.