Inventor General Discussion

Inventor General Discussion

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*Expert Elite*
Cadmanto
Posts: 3,271
Registered: ‎12-07-2011
Message 1 of 9 (390 Views)
Accepted Solution

Surfacing Difficulties

390 Views, 8 Replies
10-12-2012 07:02 AM

I am new to surfacing in Inventor.  I have gotten the attached part to this point.

What I am trying to do (to no avail) is close the gab as shown below.

surface.JPG

I tried doing a patch, but because the area is apparently not a completely enclosed loop it is not working.  I tried revolving a surface that intersects the existing, but I cannot get that to trim.

I would greatly appreciate any advise on how to resolve this.

Best Regards,
Scott McFadden
Inventor Professional 2013
(Colossians 3:23-25)

Steve,

After thickening the part I was able to create a surface within the void.

thicken.JPG

 

But now it won't thicken because it says it is unable to blend everything together.  I will never understand why when

the preview shows it perfectly, it will not produce the geometry.  :smileymad:

 

What I ended up doing (which is not ideal, but works) is creating a boundary surface on the inside and outside and changing the transparency to off then making it the same color as the geometry and that is blending in nicely.

Valued Mentor
stevec781
Posts: 691
Registered: ‎05-29-2009
Message 2 of 9 (372 Views)

Re: Surfacing Difficulties

10-12-2012 07:39 AM in reply to: Cadmanto

You should normally be able to just loft a new surface between the edges (create 3d sketches and loft between them as selecting surface edges is buggy) but your composite geometry has an overlap.  Zoom right in to see.

 

Capture.JPG

 

 

The work around is to trim the spigot back a bit to get rid of the overlap, and then create the loft.  I usually offset the surfaces with 0 offset just to keep it more stable.

*Expert Elite*
Cadmanto
Posts: 3,271
Registered: ‎12-07-2011
Message 3 of 9 (361 Views)

Re: Surfacing Difficulties

10-12-2012 07:54 AM in reply to: stevec781

Thanks Steve.

Coming from Solidworks, I am struggling a bit with the Inventor surfacing tools.

I do see there is an overlap like you pointed out, but I am still struggling to get these

surfaces trimmed.  I have sucessfully thickened the surfaces and still have the void.

I am now going to try and fill the gap within the solid geometry and forget the surfacing

for this portion.

Best Regards,
Scott McFadden
Inventor Professional 2013
(Colossians 3:23-25)

*Expert Elite*
Cadmanto
Posts: 3,271
Registered: ‎12-07-2011
Message 4 of 9 (355 Views)

Re: Surfacing Difficulties

10-12-2012 08:08 AM in reply to: stevec781

Steve,

After thickening the part I was able to create a surface within the void.

thicken.JPG

 

But now it won't thicken because it says it is unable to blend everything together.  I will never understand why when

the preview shows it perfectly, it will not produce the geometry.  :smileymad:

 

What I ended up doing (which is not ideal, but works) is creating a boundary surface on the inside and outside and changing the transparency to off then making it the same color as the geometry and that is blending in nicely.

Best Regards,
Scott McFadden
Inventor Professional 2013
(Colossians 3:23-25)

Mentor
Doug_DuPont
Posts: 212
Registered: ‎09-23-2008
Message 5 of 9 (338 Views)

Re: Surfacing Difficulties

10-12-2012 09:28 AM in reply to: Cadmanto

First I'm no surface guru.

What I did was copy your composite into Comstruction and deleted all of your revole surfaces. Ithen went into Edit Construction.

Next I deleted the fillets surfaces from the large tube to the smaller tubes. I now did boundary patch from the small tubes to the edges on the large tube. I change the condichion to tangent.

After all Patches I then Stitch everything together and copied it back.

I could then thicken your part

 

Douglas DuPont
Inventor 2013
GeForce GTX 580
Windows 7 64 Bit
*Expert Elite*
Cadmanto
Posts: 3,271
Registered: ‎12-07-2011
Message 6 of 9 (327 Views)

Re: Surfacing Difficulties

10-12-2012 10:03 AM in reply to: Doug_DuPont

Doug,

That is a lot of work!!!

Nice job though.  I am really surprised that it is this much of an effort to get something that looks to be relatively easy.

Even with what you did, while it still worked I can't imagine that it is supposed to be this complicated.

 

I will investigate your model further, but it looks like all ties to the original surfaces that it came from were lost.

Best Regards,
Scott McFadden
Inventor Professional 2013
(Colossians 3:23-25)

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JDMather
Posts: 26,893
Registered: ‎04-20-2006
Message 7 of 9 (322 Views)

Re: Surfacing Difficulties

10-12-2012 10:09 AM in reply to: Cadmanto

Patch worked here, but I can't figure out why you are doing so much work to create simple geometry?

Please mark this response as "Accept as Solution" if it answers your question.
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*Expert Elite*
Cadmanto
Posts: 3,271
Registered: ‎12-07-2011
Message 8 of 9 (311 Views)

Re: Surfacing Difficulties

10-12-2012 10:43 AM in reply to: JDMather

JD,

It looks simple in and of the part itself, but understand that this part I am trying to create is a lining

for the pipe assembly with a specific thickness.  It needs to follow the contour of the inside of the pipe

assembly with a controlled overlap out of the flange ends.

 

pipe.JPG

Best Regards,
Scott McFadden
Inventor Professional 2013
(Colossians 3:23-25)

*Expert Elite*
JDMather
Posts: 26,893
Registered: ‎04-20-2006
Message 9 of 9 (276 Views)

Re: Surfacing Difficulties

10-12-2012 05:48 PM in reply to: Cadmanto

I still think you are going about it the wrong way (for Inventor or for SolidWorks) - doing too much work.

Please mark this response as "Accept as Solution" if it answers your question.
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