Sweep/Loft General Question

yuggniiks

Hello,

I'm attempting to create a small air manifold, and create 6 holes that merge into one. 
I'll continue to search and experiment but would love to see the different ways to achieve this.



https://cad.onshape.com/documents/b2005ccd767fd0c378b1d1e0/w/dae4f99b5d22442a933f3ac0/e/8aa63d8bb4a3af79bdbe4d99?renderMode=0&uiState=64f8de2d5476b8172ae22176

Thanks for your time and knowledge sharing!
-Alan

Matthew_Curran

Not the most elegant solution, but by projecting the intersection of each hole onto a sketch I was able to create a chamber using loft. 

https://cad.onshape.com/documents/d65436f7e6177c05ebb9d44c/w/a7afdb0e82baff883003861c/e/e6ef2284e06bf4f86e7d5226

eric_pesty

Here's a simple way to do it using multiple sweeps.

https://cad.onshape.com/documents/723ddc33f331946c7e024449/w/d211a03ab9cb1b7b4ab3acff/e/2d67b10adf29a18a4e6b8536

yuggniiks

@eric_pesty I was trying to do all 6 at the same time, your solution is brilliant!  Appreciate the help.  I'm going to continue trying to tinker with the design.  My goal is to 3D print it in TPU. Perhaps your solution would print fine with stringing, or 'good enough' for my purposes, however I'm going to keep playing to try and use your solution at some point (maybe halfway up) and then have it open up to a larger chamber? not sure what it would look like. Right now I tried that in combination with shell, but then everything got messed up. I'll keep iterating.  Appreciate the community support!

Matthew_Curran

Not the most elegant solution, but by projecting the intersection of each hole onto a sketch I was able to create a chamber using loft. 

https://cad.onshape.com/documents/d65436f7e6177c05ebb9d44c/w/a7afdb0e82baff883003861c/e/e6ef2284e06bf4f86e7d5226

eric_pesty

If you don't care what happens inside you can do something like this:
https://cad.onshape.com/documents/723ddc33f331946c7e024449/w/d211a03ab9cb1b7b4ab3acff/e/311d6800fc36a7e9f8d3b2f5



You might get "cleaner" results if the bottom corners were concentric with the corner holes like this:

yuggniiks

Matthew_Curran thanks for that solution! In your "Chamber" folder, how did you create the "Sketch - Bottom of Chamber" with the six circles aligned to the inside of the chamber?  I see your constraints in the sketch, but how did you align the six circles?  Did you do it visually by hand? 

eric_pesty thanks for an additional solution. I haven't thought fully about what is req'd or would work for my application. The manifold is bringing in (6) 1/4" diameter air lines supplying ecig vapor. They funnel down to one, and ultimately for use in MRI for human participants. This is going to be iterative and maybe I can save material and use your second solution. 

Appreciate the knowledge!  Thanks!!

Matthew_Curran

@yuggniiks I did that using the "Intersection" sketch tool. I selected the tool then clicked on each face of the 6 holes. It will project the intersection of that face on the sketch plane.