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Tangent assy. constraint?

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RyanRun

Automotive
Joined
Jan 12, 2006
Messages
59
Location
US
I have an assembly, which has an o-ring positioned in a c'sing (Cone shape).

How do I assy the o-ring into the c'sink so that it is tangent to the c'sink surface?
 
RyanRun,
2 constraints needed. first constrain the axis of the cone shape to the axis of the o-ring. next constraint will be a surface contact constraint from the cone shape to the o-ring

Regards,
Derek
 
I was trying that, but the contact constraint does not work. When I select the contact constraint, I can select the c'sink surface, but it does not allow me to select the o'ring (Created with a revolved circle).

 
you might have to create some 'dummy' geometry to get that second constraint. Something like a plane passing through the centercurve of the o-ring, and a plane passing through the center of the groove.
 
No they are not. I was just hoping that there was some type of tangency constraint I was overlooking. The same o-ring could be used in many different Products.

I just wanted the oring to stay tangent to the c'sink if there were dimensional changes to a part.

 
Are you using version 14,15 or 16 of catia?
 
Hi,

On the o'ring create a reflect line with the angle value of the cone. create a point on this curve.
Then coincidence between point and cone surface.

Eric N.
indocti discant et ament meminisse periti
 
in fact the point cannot be constraint to the face but the reflect line can be in CONTACT with the cone surface.

Eric N.
indocti discant et ament meminisse periti
 
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