Struggling with a way to model dimples in a loudspeaker cone

[josh]

Hi all,

I've been working on a model of a loudspeaker driver, and its metal cone has five dimples in it that I need to include.  I've included a picture of the features on the physical part I'm modeling so you can see clearly what I'm referring to.

The cone is a body created with a revolved sketch; my thought thus far has been to somehow create a sketch plane that is perpendicular to the axis of one of the dimples, draw a profile on it, then extrude.  Actually, I'll probably need to extrude twice - once to remove existing material, and a second time to add material.  Once a single feature is created, I'd just copy it around the speaker's axis to yield the total of five.  I guess the crux of my problem is that I can't yet think of a way to draw the appropriate sketch plane to get started.

If anyone can suggest a way to do this, or even to accomplish the end goal in a completely different way, I'm all ears.

Thanks!

[davebYYPCU]

Rectangle is the inclined revolve, speaker surface, 

the other sketch the cross section of a volcano, was extruded to the rim, and

half of it revolved for the front / lower fillet 

Extdimple2.PNG

Used Plane on a Path to locate the purple sketch plane.

Extdimple.PNG

Extdimple3.PNG

Not super accurate, but 

Might help....

[TrippyLighting]

My question would be how thick is that cone ?

Depending on the answer I'd actually not start this as a solid, but as a surface to be thickened.

[Anonymous]

Peter beat me to it but here's my method. Sorry no screencast.

cone.PNG

[chrisplyler]

@TrippyLighting

Very nice.

Doesn't light up though. Needs blue LEDs.

speaker_cone_v1_png.jpg

[TrippyLighting]

Here's my version. Not sure what that has to do with a speaker anymore 😉

Render doodle v1.png

[josh]

Wow, thanks for the quick replies everyone!  Much appreciated.  I'll look these over soon.

[josh]

Hey Peter -

Then cone is about .2mm thick.  I hadn't thought of making it a surface and thickening it; that sounds promising.