topic Re: flexible O-ring creation in 3D Part & Assembly Design

flexible O-ring creation

MB_10357724 — Thu, 16 Mar 2023 02:03:45 GMT

I have created O-ring model with revolve feature with ellipse cross section with axial and radial distances.

Now i want to assemble them and simulate the actual assembly condition.

case 1 (Assemble on the shaft groove): inner diameter is constant and outer diameter will be squeezed which change the cross section of the Oring axially)

case 2 (Assemble inside the Hole): Outer diameter is constant and inner diameter will be squeezed which change the cross section of the Oring axially)

Is there a way to create a o-ring with reflect the assembly condition with relations just by changing the ID or OD rather than changing the cross section manually ?

Re: flexible O-ring creation

Dale_Rosema — Thu, 16 Mar 2023 12:26:18 GMT

You could make a family table.

The generic part could be at rest.

Then make (2) instances: One for assembling outer and another for inner. If you define the cross section with parameters, you could modify that in the family table also.

Re: flexible O-ring creation

MB_10357724 — Thu, 16 Mar 2023 12:28:29 GMT

Thank you Dale for the response. is there any way to do this with single instance? pls let me know.

Re: flexible O-ring creation

tbraxton — Thu, 16 Mar 2023 12:32:24 GMT

There is the option of making the part flexible. This functionality was intended to handle the scenario you described.

About Flexible Parts (ptc.com)

Article - CS28948 - How to make a part or component in assembly flexible in Creo Parametric (ptc.com)

Re: flexible O-ring creation

TomU — Thu, 16 Mar 2023 17:30:23 GMT

Video of what @tbraxton suggested:

(view in My Videos)

Re: flexible O-ring creation

kdirth — Thu, 16 Mar 2023 18:34:37 GMT

I would suggest also looking into To_Define_a_Flexible_Part (Found under About Flexible Parts)- I use this to predefine flexibility in parts and assemblies when I know it will probably be flexed when used. This adds the values and other features to the flexibility definition when adding model to an assembly.