Fill a hollow object

andrea_6

Hello. I have an object with a hole inside. I want to make it solid, how can I fill hidden holes?

NeilCooke

Trust you @philip_thomas to think of that!

Wouldn't it be quicker to make a big cube, subtract the part from the cube (keep tools), delete the cube, then union the original part with the leftovers?

noa

Hi @andrea_6 ,

I recommend trying our Delete Face tool. More info here: https://cad.onshape.com/help/Content/deleteface.htm

Depending on the complexity of your model, you should be able to use that tool, select all the internal faces, and the model will fill.

If you make your document public and include a link to it here, we may be able to help more.

-Noa

philip_thomas

Alternate methodology where there are multiple voids or multiple faces that are difficult to pick;

Lets say your part is called Part1

1) Generate a cube around your part (Part2)
2) Use Transform/copy to make an identical cube (Part3)
3) Boolean subtract Part1 from Part2 (keeping tools)
4) Hide Part1 Part2 Part3
5) Delete all other bodies (these are the voids)
6) Show Part1 Part2 Part3
7) Boolean subtract Part2 from Part3 (you now have an exact copy of the original part (minus the voids)
8) Optional - this step preserves the original body ID - use this step if Part1 has been derived somewhere else or used in an assembly. Boolean union Part1 and Part2 (make sure you select Part1 first). 

This process is very repeatable and works for any number of voids. Because the steps are always the same, it would lend itself very well to a custom feature (FeatureScript). 

I hope this helps  

NeilCooke

Trust you @philip_thomas to think of that!

Wouldn't it be quicker to make a big cube, subtract the part from the cube (keep tools), delete the cube, then union the original part with the leftovers?

philip_thomas

AWESOME!!! Neil's Solution is better

andrea_6

A lot of good answers here!