Another Assembly Question

• Feb 19, 2005

• #2

motorsportsdesign

Automotive

Jul 23, 2003

90

US

In the oring part, create a datum plane and mate to it.

Jonathan T. Schmidt

http://www.schmidtmotorworks.com

 

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• Feb 20, 2005

• #3

Tetragrammaton

Aerospace

Nov 27, 2002

85

DE

Hi Metfuel,

It just so happens that I have been doing the exact same thing recently.

You will need to have a datum plane running perpendicular through the o-ring. I use this to create an offset from the bottom of the o-ring groove, or other appropriate reference as required, to the datum plane at half the o-ring thickness.

Also you should have an axis to allow you to align you o-ring to the o-ring groove, assuming it to be circular.

If for some unusual situation you have an o-ring which is to fit into a irregular or non-circular groove, three datums would you best option possibly.

I hope this is of help

Best Regards

Dave

 

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• Feb 21, 2005

• #4

MSPBenson

Mechanical

Jan 13, 2005

190

GB

Even better is create a datum plane as already suggested but use the "centre" mating condition using a 1 to 2 approach.
You then don't need to have a positional expression for 1/2 the o-ring groove.
Guess this would depend on the appliction a bit though.

Hope that's useful.

Mark Benson
CAD Support Engineer

 

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• Feb 21, 2005

• #5

feadude

Mechanical

Dec 23, 2003

230

US

How about using interpart expressions?

 

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