hollow tube parts?

gary_pien

I'm trying to design a funnel collection system. Basically 4 funnels would sit atop this part, and liquid would be directed to a central pipe, and down into a container (eventually). 

I'm having trouble figuring out the best way to use OnShape to design the collection tubes (which obviously need to be hollow). Here's what I came up with so far



https://cad.onshape.com/documents/3250f5a569af378900440645/w/d95474c25307f2c7cb6dcfed/e/1afc120f4d04154efd76e7f5

But  I can't tell if Shell worked on the angled "arms" and whether the arms are actually hollow. Is there a better way to do this?

bradley_sauln

I would make sure this entire piece is seen as 1 part in Onshape. Once you have that, the shell command will properly work with the angles. Here's the section view as it stands now to show how the separate parts are affecting what you are trying to accomplish: 

owen_sparks

I believe @bradley_sauln has pointed you in the right direction.  Try a boolean union of the 3 parts before the shell.

OwS

bradley_sauln

I would make sure this entire piece is seen as 1 part in Onshape. Once you have that, the shell command will properly work with the angles. Here's the section view as it stands now to show how the separate parts are affecting what you are trying to accomplish: 

gary_pien

Cool you taught me a thing: section view - hadn't known about that feature before!

The weird thing is, if I suppress the Circular pattern (which reproduces the other 2 arms), I see the initial arm which is hollow all the way through. At that stage, there is only one part. But after Circular, the joint becomes solid and doesn't allow flow into the central pipe. After the Circular operation, there are 3 parts. I tried Boolean them but it doesn't solve the solid-joint problem.

owen_sparks

I believe @bradley_sauln has pointed you in the right direction.  Try a boolean union of the 3 parts before the shell.

OwS

gary_pien

Yes thank you. To clarify this worked:
Circular pattern --> Boolean --> Shell

Thank you both.

owen_sparks

Groovy