Merge 2 parts, Boolean Union does not work

kurt_conyngham

Hello,

I've managed to change three parts into one but I have two remaining parts that I want to make one, Boolean Union doesn't work, just goes orange and says can't return a valid part. 
Not sure if this is because the two parts intersect slightly.
I need to export as a step file with a single part to get quotes.

The link to the part is:
https://cad.onshape.com/documents/7259f40b4c14c22d6fc19dd6/w/3ac6eb1afcabdcfb9f35fb06/e/5573038757232f5848c87808

any ideas?

thanks,

noa

@kurt_conyngham I took a look and did a section view. Note the two corners meeting perfectly along a single line. This results in the zero-manifold geometry that rami mentioned. You'll want these parts to either intersect or meet along a face rather than an edge. (One way to think about it is that that current geometry would never be manufacturable as a single part)

3dcad

At first, single step file can hold multiple parts.

About boolean, usually there are only two reasons why it doesn't work, either parts don't touch each other or they only share one point or line (zero manifold body). Parts can intersect, it shouldn't cause any problems.

noa

@kurt_conyngham I took a look and did a section view. Note the two corners meeting perfectly along a single line. This results in the zero-manifold geometry that rami mentioned. You'll want these parts to either intersect or meet along a face rather than an edge. (One way to think about it is that that current geometry would never be manufacturable as a single part)

kurt_conyngham

Not 100% what that means, that point is internal to the parts structure so I don't see how that would affect its manufacturing.
How would I go about fixing it?  

kurt_conyngham

I understand now, I didn't see there was a void between that loft and the face because its capped off on the end.

thanks guys

shaun_don

is it not possible to merge parts that dont intersect?