How to work with elastic part shape part/assembly (deformed)?

[j.pavlicek]

Hi,

what is suggested approach to design elastic parts and use them in assemblies?

For example: O-ring

Nominal dimensions: d_s = 3 mm, d_i = 20 mm (shape in drawing for manufacture)

But groove is 2×4 mm and d_i = 22 mm (shape for assembly)

Is possible to achieve it with one part?

(Yellow is - obviously -what I get when place first part into an asssembly)

PS: O-ring is only (simple) example. I want to use it for more complex custom sealings.

[Xun.Zhang]

Hello @j.pavlicek,

This is something called part alternative representation internally and there is a new project working in progress to address such request, you can participate the beta program to experience the new enhancement.

https://bit.ly/InventorBeta

In addition, you can also cast the vote to below idea.

Level of Detail for Parts

Currently, you may consider iPart or iLogic to handle it.

Hope it helps!

[Cris-Ideas]

Hi,

Depends on exactly what your expectations are.

For o-rings and other seals I model them as deformed (after all this is just for representation). but all of a certain type share the same part number.

Cris.

[S_May]

@j.pavlicek,

Create an IAM
Create the O-ring relaxed, insert into the assembly
Create the O-ring compressed
Create a replacement object and select the compressed O-ring

finished

https://knowledge.autodesk.com/de/community/screencast/fcbe68ea-b0dd-4277-b39d-ed0115c5159a

Screencast wird nach Klicken auf „Veröffentlichen“ hier angezeigt.

fcbe68ea-b0dd-4277-b39d-ed0115c5159a

[Anonymous]

If in need for realistic parts I will create them adjustable to start with. In the example of an O-ring : if you design it as an oval shape you can tweak it into round with proper variable values, it doesn't work the other way. May sound like a lot of work but once you have one you have them all. Production parts can't be done this way because they need to be in released state, meaning frozen, so I have working alternatives for use in assemblies. Main disadvantage is that you have to update 2 files when going through any change. If flexible geometry is to hard to setup I will cut the "stiff" part and recreate a flexed version on the spot. A true-false variable will display either state.

[swalton]

Another vote for iparts.

One member for the as-molded version, then additional members for all the various as-installed versions.

I would not bother doing this for O-rings, but I might for a complex seal or other flexible part.

If/when the alternate rep behavior gets released you may have more options.

[ravikmb5]

u can use two different configuations

driving parameters in ilogic

for ex: using ellipse in compression stage

and circle in un compression stage

[kelly.young · Accepted solution]

Hello @j.pavlicek here might be a decent way to quickly switch between part configurations with parameters. You can also animate for visual presentation.

Please select the Accept as Solution button if a post solves your issue or answers your question.