CAD Help for Archimedes Screw

Project Support
1

Hi,

I recently reached out about an issue I was having with my simulation a couple days ago and was amazed at the fast and accurate help I got. I’ve been having an issue with making a CAD model that I want to test so I figured I should ask here as well.

I’m simulating flow through Archimedes turbines that look like design (b), but I’ve been trying to edit the shape to look like (a) or (c) but to no avail. (Image attached)

image
image2000×1149 121 KB

If anyone has any ideas on how to make this, that would be greatly appreciated.

Best,
Tobi

2

I don’t know which CAD tool you are using, but with Fusion 360 you could create a Coil (square) and then add chamfers as shown.

chamfer
chamfer1294×1522 134 KB

If you need the screw to be a sheet with no thickness, you can create an offset sheet in Fusion’s “Surface” environment.

offset
offset667×480 69.3 KB

Best,
Jan

1 Like
3

The method I used can be found here: [Fusion360] How2 design a 3D printable feed screw - YouTube

It’s slightly different from what you suggested but I can try rebuilding in the way you laid out. Thank you!

And if you have any suggestion(s) about the method i used, that’d be extremely helpful too.

4

Hi,

I was successful in using this method to make my screws. The issue now is that they don’t mesh when I try to use the same settings. Can anyone take a look and let me know what’s wrong?

Thanks,
Tobi

5

Did you export the CAD as STEP? Is your model one single body? I found there may be errors if this isn’t the case.

Best,
Jan