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Creating Boundary Patch

4 REPLIES 4
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Message 1 of 5
djchristophe
1548 Views, 4 Replies

Creating Boundary Patch

Guys,

 

I'm having problems creating a boundary patch on the attached model, Its a Y-Pipe joint in 3 planes that I'm attempting to split in half. I've used a silhouette curve to create a centre line in a 3d sketch then joined the ends together, however when I try to select the lines to create the boundary patch it only allows me to select some not all of the lines.

 

Can any one advise please?

 

 

Regards,

 

Chris

4 REPLIES 4
Message 2 of 5
JDMather
in reply to: djchristophe

Is this what you are trying to do?

Patch.PNG

 

Planar patch correct?

Planar is 2Dsketch.

Create workplane though 3 points (I used center of arcs).

Project Cut Edges.

Boundary Patch.

 

Not sure why you would do this part as Adaptive, but for sure if doing as adaptive I would fully constrain those arcs by adding Tangent constraints.


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Message 3 of 5
djchristophe
in reply to: djchristophe

Thanks for the reply, I dont want the split to be on a flat 2d plane, I would like it to follow the silhouette curve ie form a 3d separation that is along the centreline of all 3 pipes. (The small pipe deviates in the Z direction as well as XY)

 

 

Cheers,

 

Chris

Message 4 of 5
JDMather
in reply to: djchristophe

After I fixed the tangecies you still had two tiny gaps in the 3D sketch.

Close those and the boundary patch works with your 3D sketch.

 

Gaps.PNG


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Autodesk Inventor 2019 Certified Professional
Autodesk AutoCAD 2013 Certified Professional
Certified SolidWorks Professional


The CADWhisperer YouTube Channel


EESignature

Message 5 of 5
djchristophe
in reply to: djchristophe

Thanks, I hadn't noticed the gaps. I've gone over and found 3 gaps which I've joined and 1 overlap and it will now create a boundary sketch. However the next step in my model is to extend this surface out 5mm (I'm creating a male press tool) but the extend tool is creating errors, which I guess may be linked to the overlaps and gaps in the boundary sketch.

 

Is there anyway I can create a better boundary sketch? I can understand why it would leave gaps and overlaps where it has. A collegue is working on a similar tool although slightly larger and is having no issues.

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