Inventor General Discussion

Inventor General Discussion

Posts: 5
Registered: ‎08-27-2012
Message 1 of 6 (441 Views)
Accepted Solution

Loft with multiple openings

441 Views, 5 Replies
01-24-2013 12:47 AM



I was wondering if it is possible to make a surface loft go from 1 square section to 2 round sections.

So 1 ingoing section en 2 outgoing sections.

I've attached a simple drawing.


Many thanks in advance!



Distinguished Contributor
Posts: 128
Registered: ‎09-10-2012
Message 2 of 6 (422 Views)

Re: Loft with multiple openings

01-24-2013 02:10 AM in reply to:

I think it may be possible to do two seperate lofts as surfaces, then once these surfaces exist, do a sculpt to create a solid.


Let me know if you need me to explain in more detail.


Edit: I have had a bit of an experiment with it but so far I can't seem to be able to get the sculpt to compute.  I think the surfaces need to be merged together somehow first. I have tried using 'stich' but this didn't seem to solve the problem.

Wayne Helley
Inventor 2013 Certified Professional

Autodesk Inventor Professional 2013
Windows 7 Enterprise, 64-bit
Valued Contributor
Posts: 87
Registered: ‎03-07-2010
Message 3 of 6 (407 Views)

Re: Loft with multiple openings

01-24-2013 02:46 AM in reply to: waynehelley

Wayne Helley,

I suggest you make the 2 lofts in solid. Then delete the 3 faces and you will get a surface.

Something like that:


AIP 2014
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Dell Precision T7400 Intel(R) Xeon(R) CPU X5472 @ 3.00GHz (4 CPU's), 8Gb RAM, NVIDIA Quadro FX 5600 1536MB GDDR3
Distinguished Contributor
Posts: 114
Registered: ‎11-18-2010
Message 4 of 6 (396 Views)

Re: Loft with multiple openings

01-24-2013 03:49 AM in reply to:

Hi Nick,


It’s not too difficult to loft square to 2 rounds, but the transition is not really pretty,

It would look nicer if the square edges had radii if allowable.

Just keep in mind the topology of the loft.

Keep loft edges to the same edge count, (i.e. not 1 edge to 3) etc...






Posts: 5
Registered: ‎08-27-2012
Message 5 of 6 (361 Views)

Re: Loft with multiple openings

01-24-2013 06:32 AM in reply to:

Thanks for the quick answers.


I found a method which gives a satisfactory result.

First I made 2 lofts, next I deleted the faces in between the lofts and finally, I patched the 2 lofts together.


I have attached a screenshot of the result.


Thanks everyone for the replies!

Valued Mentor
Posts: 459
Registered: ‎10-22-2008
Message 6 of 6 (325 Views)

Re: Loft with multiple openings

01-24-2013 07:35 AM in reply to:

If you want this to be a true sheet metal transition which could be flattened, you would have to make two halves like the attached.

Loft Transition.jpg


Mike Patchus

Inventor 2012 SP3 ~ Vault Pro 2013
Lenovo D20 Workstation Intel Xenon E5640@2.67GHz (2)
Win 7, 24gb RAM, NVIDIA Quadro FX 3800

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