topic Re: making part to fit another part in Inventor Forum

making part to fit another part

Anonymous — Mon, 16 Feb 2015 13:57:05 GMT

What technique would you use to make an O-Ring part so it fits into Sweep-2 shape from the attached part "seal". I will then constrain in assembly mode the 2 parts?

Thanks

James

Re: making part to fit another part

JDMather — Mon, 16 Feb 2015 14:13:44 GMT

Make the 3D sketch visible.

Start a new part file.

Manage tab>Derive Component and derive the 3D sketch into the new part file.

Sweep the o-ring profile.

Make sure your Profile plane is perpendicular to the sweep path curve.

Re: making part to fit another part

CCarreiras — Mon, 16 Feb 2015 14:15:45 GMT

Hi!

You can do this several ways: multisolid, derive part, in assembly context (by copying the face)...

I Created the O-Ring based in the derive part method. That way both parts will maintain associative, therefore, if you change the part, the O-Ring will re-adapt accordingly.

Check it!!

Re: making part to fit another part

CCarreiras — Mon, 16 Feb 2015 14:17:19 GMT

BTW, later, to constrain both parts in the assembly, you can make coincident the seal planes with the O-ring planes.

Re: making part to fit another part

JDMather — Mon, 16 Feb 2015 15:45:53 GMT

Carlos - your O-ring is not created with the profile perpendicular to the path?

Re: making part to fit another part

CCarreiras — Mon, 16 Feb 2015 15:59:54 GMT

Hi JD.

The O-Ring profile (sweep) is the same of the sweep in the part, so both have to connect perfectly.

Re: making part to fit another part

JDMather — Mon, 16 Feb 2015 16:20:56 GMT

I just realized - the sweep in the original Seal part is not created correctly either.

The profile for the sweep should be perpendicular to the path.

Re: making part to fit another part

CCarreiras — Mon, 16 Feb 2015 16:25:12 GMT

I agree with you ...
but the question was not that, so ... i kept things like the "customer" Demanded. 🙂

Re: making part to fit another part

Anonymous — Mon, 16 Feb 2015 21:22:06 GMT

JD, can you show me where i went wrong. Can you post my part showing correct technique so i can check

thanks

James

Re: making part to fit another part

JDMather — Mon, 16 Feb 2015 22:16:20 GMT

The difference is very subtle on this part.

The way you did the cut the profile of the groove would be slightly eliptical.

Recently someone posted an example of a longer sweep that was a couple of meg - reduced significantly with circular profile perpendicular to path.

Re: making part to fit another part

JDMather — Mon, 16 Feb 2015 22:21:56 GMT

On this example it is more obvious if I change the 8mm to 35mm.

Re: making part to fit another part

Anonymous — Mon, 16 Feb 2015 22:25:57 GMT

Thanks for pointing this out