3-D revolve trim

[youngfg]

I need to trim some 3-d shapes, specifically revolves, where they overlap.
I am making a carb spacer and I can't figure out how the eliminate the overlap of the radius in this part.
Any Ideas?

[eshreve]

You can use the boolean unite function to join the revolves into one solid, then use the unstitch function in the solids menu to separate the surfaces.
Once they are separated, delete the surfaces you don't want.

[tobyaxis]

Do you mean something like this?

[tobyaxis]

Originally Posted by eshreve You can use the boolean unite function to join the revolves into one solid, then use the unstitch function in the solids menu to separate the surfaces. Once they are separated, delete the surfaces you don't want.

This works too Eshreve, but may leave open spaces which will not be water tight.

I went in and used the Planar Surfaces on the Ventry to close them off. Then Extruded a Solid 1" high then Booleans Difference to Subtract the Ventry from the Extrusion. It took about 5-10 minutes in between Forum Replies.

[youngfg]

That looks great!
Now if I can duplicate it, and get a good tool path off of it.

[tobyaxis]

Originally Posted by youngfg That looks great! Now if I can duplicate it, and get a good tool path off of it.

That does look nice but the way it is designed will creat Turbulance under the Carb. You really need Straight Bores to make the Ventry Longer. This creates More Low End Torque. Take the Tuned Port Injection on the Corvette L98. The long runners made tons of low end Torque.

Also make sure that the Butterflies don't bind.

If you don't mind my asking, what Carb and Intake Manifold are you using?

[youngfg]

The radius actually goes down away from the carb, and the top of the spacer will be unradiused holes that match the carb exactly,so instead of having the straight bores of the carb flowing into an open area of the intake, this spacer smoothes the flow out.
I am making the spacers for a local racing team, they are buying a similar spacer now, it adds about 15hp to the particular engine combo. It goes under a Holley Dominator carb,they want to try slightly different styles and materials out.
So I have to get good enough at making these types of shapes to make several different spacers to fit different carb and manifolds they are using.

[youngfg]

I got back on this project and made the part.
Here is the finished product.