How to calculate enclosed volume of Fusion 360 assembly?

[hcardenasXH3VU]

Hi All, I have an assembly that consists of multiple other components. I am wanting to find the buoyancy of this assembly, but I need to calculate its total enclosed volume. This is different than the individual volume of its constituent components, as the assembly has some enclosed cavities etc. Using boundary fill is not an option, because the model is not strictly water tight (there are tolerance gaps etc). I tried it but there were about a million cells to click after. I looked for a way to combine all the components/bodies into one single body, and "flatten" my model, but this didnt work. If I could achieve that, then I could just cut it out of a large block and find the volume that way. Any help would be greatly appreciated!

[etfrench]

Can you use the offset command in Surface workspace on just the external faces? After patching, this should give  you the total volume.

[jhackney1972]

Take a look at this Blog Article and Video.  It was created to make a single body of a complete assembly for design security purposes.  Once you have the single body, you can ask for the Properties of the body from the Browser and get the Volume.  The only thing I am not sure of, from reading your requirements, if you need any assembly cavities filled or is the volume of the model enough.  Anyway, I will let you decide.

[TheCADWhisperer]

---

@hcardenasXH3VU wrote:

I have an assembly that consists of multiple other components. I am wanting to find the buoyancy of this assembly…

---

Can you File>Export your *.f3d file to your local drive and then Attach it here to a Reply?

Don’t you also need the total mass?

[hcardenasXH3VU]

I tried this method exactly, but it didn't work properly for some reason. I was left with 14 different bodies, and all the cavities were still there. Does the assembly need to be ultra water tight? This won't be possible with my model, as many components have a clearance or transition fit, which is not strictly closed off

[hcardenasXH3VU]

Sorry, I can't post the model as it contains our IP. This model is of a real physical product which I can easily weigh, so I don't need to calculate mass

[TheCADWhisperer]

---

@hcardenasXH3VU wrote:

Sorry, I can't post the model as it contains our IP. 

---

@hcardenasXH3VU 
The logical approach would be to create a simple dummy assembly that exhibits the same behaviors as your proprietary data and Attach that file here for demonstration.

I am surprised that so few posters here think of that logical step in problem solving.