Inventor General Discussion

## Inventor General Discussion

Member
Posts: 3
Registered: ‎01-31-2013
Message 1 of 5 (659 Views)

# Creating Boundary Patch

659 Views, 4 Replies
01-31-2013 09:20 AM

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.

Regards,

Chris

*Expert Elite*
Posts: 28,228
Registered: ‎04-20-2006
Message 2 of 5 (655 Views)

# Re: Creating Boundary Patch

01-31-2013 09:28 AM in reply to: djchristophe

Is this what you are trying to do?

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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Registered: ‎01-31-2013
Message 3 of 5 (628 Views)

# Re: Creating Boundary Patch

01-31-2013 12:11 PM 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

*Expert Elite*
Posts: 28,228
Registered: ‎04-20-2006
Message 4 of 5 (616 Views)

# Re: Creating Boundary Patch

01-31-2013 03:03 PM 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.

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Autodesk Inventor 2015 Certified Professional
Certified SolidWorks Professional
Inventor Professional 2015-SP1 64-bit
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http://home.pct.edu/~jmather/content/DSG322/inventor_surface_tutorials.htm
Member
Posts: 3
Registered: ‎01-31-2013
Message 5 of 5 (598 Views)

# Re: Creating Boundary Patch

02-01-2013 03:06 AM 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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