varying diameters on single cylindrical boss-extrude?

[rojak]

Hello,

First post here.

I am looking for the most efficient way to model a cylindrical shape with stepped diameters along its length.

As a simple example, imagine a barbell with a large diameter (weight) on one end, then a small diameter handle in the middle, then back to a large diameter weight on the other end.

I understand how to do this with multiple boss-extrudes, or by revolving a stepped profile, but is there a way to do it with something like a single boss extrude whose diameter changes at different points along its length?

I hope I'm explaining this clearly. Thanks.

 

[TheTick]

Nothing comes to mind.

Honesty may be the best policy, but insanity is a better defense.

http://www.EsoxRepublic.com

-SolidWorks API VB programming help

 

[beachcomber]

This is something that Catia V5 can do, but it can be quite messy if you don't really understand it.
In your sketch you can create a series of concentric circles. They can all then be used to create a single protrusion feature, but with different limits for each region.
This would enable you to create a stepped bar in one feature.
Alternatively use a revolved feature.

bc.
2.4GHz Core2 Quad, 4GB RAM,
Quadro FX4600.

Where would we be without sat-nav?

 

[Nella95]

You could revolve-extrude a profile - assigning a variables to the sketch dependent on a design table - but yeah - I agree with TheTick - nothing comes to mind.

 

[Eltron]

You can do a loft with your diameter sketches being the profiles for the loft.

Dan

http://www.eltronresearch.com

Dan's Blog

 

[CorBlimeyLimey]

"I am looking for the most efficient way to model a cylindrical shape with stepped diameters along its length. "

If "most efficient" = fewest features, then a Revolve-Extrude fits the bill.

 

[rojak]

Thank you gentlemen. I think I was looking for a feature like beachcomber described that just isn't there. I will use a revolve.

 

[TheTick]

If you are worried about "efficiency" in terms of how fast a model is initially created, you are failing as a steward of your companies resources. Models need to be constructed in a way that matches their design requirements. They also need to be constructed so that they don't unravel in the face of changes over the life of the design.

 

[rojak]

Interesting scenario. I am my own employer and in this case my own client. However I will consider sacking myself if I find I have been negligent.