Adding O-Ring Groove on outside of cylindrical object

[Zerb]

cant figure out how to add a groove into the part i have drawn the arrows to.  i will not be machining this part from this drawing, its more or less just needed for aesthetic reasons. hope someone can give me some pointers here, thanks in advance.  

http://i39.photobucket.com/albums/e164/zerrb/07KTopPiece_zpsdb150b7d.jpg

[jeff_strater]

I would just use the Torus primitive.  Something like:

my crude attempt at your design (minus a lot of details):

step 1:  create a workplane where you want your groove:

step 2:  invoke Torus.  Select this plane, select the center as the torus center, expand the inner diameter and torus diameter to be about where you want it, make sure the Operation is set to "cut":

and OK:

Hopefully this will work for you!

Thanks for posting

Jeff Strater (Fusion development)

[Zerb]

awesome! i see how this will work perfectly for what i need to accomplish.  my issue now is that im not able...aka doing something wrong....to find the center on the plane that i created. 

[jeff_strater]

Yeah, my example was centered on the origin.  If that's not the case, then the easiest thing to do is first create a sketch on that plane, then Project the cylinder into the sketch:

Then, while still in sketch mode (that's important), you can pick the center of the circle in your sketch as the Torus origin :

then, the rest is as described above.

Good luck!

Jeff

[Zerb]

i just ended up making the torus the size i needed, then manually moved it into place. again this is purely for aesthetics. i will try your method though just to make sure i remember how to do it next time around.

[AbdnAllHope]

Just a bit of an FYI.  O-Ring grooves come in a variety of shapes and sizes, but I have never seen a perfectly round one.  Even if your groove is asthetic, it would look more "real" if it was square.

There are a lot of rescources out there, but here is a link to one I found with a quick search that gets the point across rather well.

http://ablesealanddesign.ca/category/O-Ring-Groove-Design/183.html

phil

[Zerb]

you make a valid point for sure! would there be a simpler solution to my issue if i were to go about making a "square" o-ring groove?

[carl_bass]

One way to do it is using the pipe command using the square profile. I showed what pipe did but then showed how to move the cut down the cylinder by making an offset plane and projecting the profile of the cylinder

https://screencast.autodesk.com/Main/Details/6cf40705-695e-4637-9ea9-5ea4dd1c2e98

And here's a different screencast that shows how to model a cylinder with a groove by drawing it into the sketch profile and then revolving it. This allows for more general profiles

https://screencast.autodesk.com/Main/Details/60b45141-cdd8-4a37-aa49-fba625ab0969

[jeff_strater]

those are great solutions, especially desigining the groove in the profile and revolving - this lets you put almost any shaped groove into your design (triangle, beveled rectangle, etc).  For a simple rectangular groove, you can also just use a Cylinder primitive the same way that I used the Torus primitive above (a rectangular groove in a cylinder is just another cylinder cut from it!).

Jeff

[AbdnAllHope]

I think that The Big Kahuna put this one to bed with his sketch profile / revolve example. Here is another contribution to the many ways one can accomplish this task. Attempt to keep it simple using primarily tools that can be found on the pie menu.

https://screencast.autodesk.com/Main/Details/3c31aefa-4b60-4bc3-a99e-777dd60fe0c1

phil