Need Help Drawing This Shape in 3D AutoCAD

[Bobzy20]

Oh yeah there is only one enlarged ringed section which is shown on the top view, good spotting!

 

WE need it completed in AutoCAD because that’s all we know.

[JD Mather]

WE need it completed in AutoCAD because that’s all we know.

 

Same technique previously suggested. (in any CAD program that I am aware of)

[JD Mather]

Making any progress on this one?

[Bobzy20]

Trim extruded elliptical surface to the "belt-buckle" shape.

Thicken.

Sweep cut the "ribs".

Add fillets.

 

Might need some help with this one if you have any free time.

[JD Mather]

It might be a couple of days till I can finish this up - I'm trying to do in such a way that you can follow step-by-step sequence.

[Bobzy20]

Looks good to me, thanks for your help.

[Bobzy20]

Any progress with your tutorial - JD Mather?

[JD Mather]

I forgot about this one, been busy with other work.

I'll try to get back to it, but you might have to bump the post a couple of times as I don't use AutoCAD much anymore.

[SEANT]

Here is an attempt via Nurbs Surface modeling. The process works fairly well but requires alot of attention/adjustments to ensure sufficient overlap for the SurfSculpt command.

 

The inner voids were constructed with the more standard Boolean Operations and Fillets. Though, the fillets also required a bit of overlap tolerance.

SurfBounds.dwg

Final.dwg

Edited October 6, 2012 by SEANT
Corrected command name

[Bobzy20]

Looks very nice, thanks for the input.