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Cylinder Constraint

Pioneer
Pioneer

I have a large cicular hole with a small circular cylinder inside. I want to constrain the cylinder to the hole in a way that makes the curve of the cylinder contact the top of the hole. Now here is the catch, I then will rotate the part with the hole. I need the cylinder to remain contacting the top of the hole.

6 REPLIES

Re: Cylinder Constraint

Gears Esteemed Contributor Gears Esteemed Contributor
Gears Esteemed Contributor

Hi there @Cabinet_Guy,

 

Can you share an image of this?

...as to my minds eye, it should be easy, but, clearly there must be something more to it than just using planar & axial [or tangent] relationships.

Sean Cresswell
Design Manager Streetscape Ltd
Solid Edge 2019 [MP2] Classic [x3 Seats - Cloud Enabled]
Windows 10 - Quadro P2000

Re: Cylinder Constraint

Pioneer
Pioneer

example1.pngexample2.png

This shows two positions the adjustable assembly can be in. If I use tangent constraints the parts do not always contact at the top.

Re: Cylinder Constraint

Gears Esteemed Contributor Gears Esteemed Contributor
Gears Esteemed Contributor

@Cabinet_Guy, aha......so maybe you can set "Part 2" to mate to a vertical plane, as well as the tangent face.

Best I can suggest, without knowing more about the rest of the assembly and/or more about it's movement & restrictions......try to lock down the parts, only as they would be actually used/fixed.

Sean Cresswell
Design Manager Streetscape Ltd
Solid Edge 2019 [MP2] Classic [x3 Seats - Cloud Enabled]
Windows 10 - Quadro P2000

Re: Cylinder Constraint

PLM World Member Phenom PLM World Member Phenom
PLM World Member Phenom

Tangent mates are difficult, at best.  They have far too many solutions: every 90 degrees the math changes (sin or cos) and you can always have + or - solutions (inside faces or outside faces).  I'm not surprised that you're having continuity problems with a tangent mate at the 90deg positions.

 

Try using a CAM mate instead.


____________________________________
--Scott Wertel, P.E.

Re: Cylinder Constraint

Experimenter
Experimenter

Attached is my sollution 

 

Just change the angle in relationship (Top xy 270 deg ... 90 or 180 )

 

Solid Edge ST10 Files

 

 

Re: Cylinder Constraint

Gears Phenom Gears Phenom
Gears Phenom

What about this:

 

1. Ground the inner cylinder

2.  Tangent constrain the inner wall of the hole to the outer wall of the cylinder

3.  Create a sketch that relates to the center of the larger hole

4.  Axially constrain the hole in the large block to the center point

 

You may need to perform other temporary, intermediate steps when initially setting up the tangency so the large block does not move around when setting its hole tangent to the cylinder.

 

This is a quick off-the-cuff suggestion.  I have not tried it yet.

 

Kyle

Kyle Joiner
IPA LLC
ST10 MP1