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How do I cut an o-ring grove in the face of a cylinder?
alan_brunsman706
Member Posts: 7 EDU
The grove would be the shape of an o-ring but bent to the shape of the cylinder.
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Best Answers
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alan_brunsman706 Member Posts: 7 EDUSorry, I am not asking this correctly. The o-ring does not go around the cylinder. That is too easy. The o-ring is around a small hole in the side of the cylinder. It is on the side of the cylinder. The o-ring shape would be the same if you pressed it against the side of the cylinder.
I have tried doing this in Solidworks. I formed the curve and profile of the o-ring but I could not get it to cut the profile along the curve. no luck. It was easy to cut a flat o-ring grove but I could not put in the extra dimension.0 -
mahir Member, Developers Posts: 1,304 ✭✭✭✭✭I'm not exactly sure what geometry you need, but here's one way to go about it.
https://cad.onshape.com/documents/57acdfaae4b005c413ed9b6f/w/3fd585a46d3af1b3ba413c53/e/e2f1eae15625bdc140b7f720
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John_P_Desilets Onshape Employees, csevp Posts: 249
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bruce_williams Member, Developers Posts: 842 EDUJohn's solution got me thinking about the newer Projected Curve.
https://cad.onshape.com/documents/18d823f88ac2b45dd10de9c0/w/7743cbf857f18503bbffe555/e/8c2ce9900185757dc7835163
www.accuratepattern.com5
Answers
Or if you don't need the o-ring ring use a Revolve to cut away the groove.
Owen S.
HWM-Water Ltd
I have tried doing this in Solidworks. I formed the curve and profile of the o-ring but I could not get it to cut the profile along the curve. no luck. It was easy to cut a flat o-ring grove but I could not put in the extra dimension.
https://cad.onshape.com/documents/57acdfaae4b005c413ed9b6f/w/3fd585a46d3af1b3ba413c53/e/e2f1eae15625bdc140b7f720
https://cad.onshape.com/documents/16196bcaa77ee1a30bd5d217/w/0ab77b25d90e77412efc5f20/e/f28c7a869b033079f769aa54
Very clever! Thanks for sharing
https://cad.onshape.com/documents/18d823f88ac2b45dd10de9c0/w/7743cbf857f18503bbffe555/e/8c2ce9900185757dc7835163
I have one more variable that I did not include. The cylinder needs to be tapered along the axis. A slight draft like a injection mold draft would work. How hard is that to add? The draft is on the o-ring side. Follow?
Here is my take on it. Hopefully I've understood the direction of draft required. Someone else may have a cleaner method but it's a start:-
https://cad.onshape.com/documents/65bfff954a1a1e427f2d5c6a/w/7528c1745d261331f48fc094/e/e5e6a6f4b839dc1e68b57d72
Similar to the previous method but:-
(a) Cylinder drafted on its initial extrude
(b) New construction plane created so o-ring center hole is normal to surface
(c) 2 surfaces are split to create the o-ring sweep path
Happy CAD-ding,
Owen S.
HWM-Water Ltd
Is this the desired draft you are looking for? In the example from my previous document, I modified the sketch used for the remove sweep. If you activate the section view, you can see the draft angle.