Auger Creation - Can anyone do this in Onshape

brucebartlett

Hi all, I have a requirement for a design with an auger. I really want this to be a para-metric part done in Onshape, however I can't model it. Currently I am using a imported part and adjusting with a move face command but it would be better to have it built from scratch in Onshape with variables. Has anyone got idea's how to achieve this. 

see layout geo at:
https://cad.onshape.com/documents/35911b0d72b3496386b77be7/w/35662bd64d0f4167b8e6de73/e/59db176b8c03493398222b82

_Ðave_

@brucebartlett here you are


https://cad.onshape.com/documents/3f8e994167444ff5951a9b32/w/b40ae7737693490ba889b6e4/e/b2ed0ce56ba84d48914fec59

Just add variables.

_Dave_

_Ðave_

@brucebartlett here you are


https://cad.onshape.com/documents/3f8e994167444ff5951a9b32/w/b40ae7737693490ba889b6e4/e/b2ed0ce56ba84d48914fec59

Just add variables.

_Dave_

Mitch_Pricer

I would do it with three sketches and a helix:
Sketch the center "post" and extruder it to the desired length (Variable 1), create a helix around the center post with the number of rotations or pitch desired (variable 2), and then create a plane at a curve point and sketch the dimensions of the profile to sweep around the helix. You could tie the dimensions of the profile to variables as well to make it very fast to modify all the way around.

Hope that helps.

brucebartlett

Thanks @_Dave_ that works well. Not sure why I couldn't get it myself, kinda got caught up on using the twin helix with a ruled surface which is not possible yet in Onshape. 

_Ðave_

Boy howdy I know how that is, Going down the tracks and can't get off. I was working with helix a few days ago so It's fresh on my mind.