Catia V5 Thicken surface no assembly

[itz001]

Hello,

I am trying to get a solid from a surface with thick surface and apply constraints in assembly workbench. The problem is that those constraints are not allowed.

1- I revolve an edge around an axis and then I apply thick surface. Now I can apply constraints. (The pictures upside)

2- I make 4 sketches. Blend, blend, blend, Healing + join + thick surface
Now I can't apply any constraint in assembly workbench
What is the problem with the second option?

Blend generates a surface between those two circles, no? and thick surface transform it to solid, right???

 

[MrCATIA]

Are you having problems with finding the axis (centerline) when adding constraints?

With #1, the solid is made directly from a Revolved surface, so an axis is defined and can be used for constraints.

With #2, none of the blend surfaces have a axis, so the shape is undetermined (even though it looks like a cylinder). If you want to use this method, you have to add a centerline to the part, and use this line to build the constraint.

 

[itz001]

Hello MrCatia,

Thank you very much.

Yes, I did it. I sketched an axis and it works.

With #2, I have an extra problem. If I want to use "contact constraint" in "assembly workbench", it is not possible to select those surfaces in the picture. I mean, the one with an arrow is flat, but I can not apply contact.
Do you have an idea why?

Cheers

View attachment 1447

 

[MrCATIA]

The attached picture is not valid.

If you are having problems with the middle blend surface, the reason is the same; that surface was not created as a planar surface, so it is not valid for a plane-to-plane contact constraint. Are you sure that surface really is flat?

The easiest way to fix this is to add a plane through one of the surface edges, and use the plane for the contact constraint.