topic Re: Lofted Flange refold failure in Inventor Forum

Lofted Flange refold failure

Anonymous — Mon, 03 Jun 2019 07:49:54 GMT

When creating cone with lofted flange feature I encounter problems in each different approach. I needed to apply unfold feature to add holes on the cone with intention refold it back to cone again. Unfortunately Inventor is giving failure comments for each different approach solving this problem

could not replace the geometry with desired contour

feature compute failed

Please help to solve this issue.

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S_May — Mon, 03 Jun 2019 08:17:58 GMT

@Anonymous

Betreff: Lofted Flange refold failure

Anonymous — Mon, 03 Jun 2019 08:32:30 GMT

Many thanks for quick response!

Please describe what was the issue so the next time I will not start spoiling the forum 🙂

Unfortunately I have 2019 inventor and I am not able to open the file. Please save in older version if possible.

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S_May — Mon, 03 Jun 2019 12:46:49 GMT

@Anonymous

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Anonymous — Thu, 13 Jun 2019 12:55:37 GMT

Unfortunately I get errors creating this model. I have Inventor 2019.

The model is created by lofted flange. I use one of the segments plane and through cut normal I am able to create hole which is perpendicular to flat pattern surface.

But as I create hole pattern and then flat pattern inventor goes to sand watch regime and afterwords shows an error me message at the same time showing some incredible artistic capability by twisting my ipt (picture enclosed)

Messages are could not build this cut and etc...

Please help to solve this issue.

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johnsonshiue — Thu, 13 Jun 2019 21:26:24 GMT

Hi Jaanus,

The flat pattern failure has been fixed as of 2019.4 update (see attached file). I notice you are still on 2019.3. Please install 2019.4.

Many thanks!

Betreff: Lofted Flange refold failure

Anonymous — Fri, 14 Jun 2019 06:07:46 GMT

Thanks for a hint.

After some manipulations the pattern was generated, but the part is not correctly visualised*(2019.4). Pattern holes visually do not penetrate through sheet metal. Aftercut does not help as well because as I understand it does not see any "physical material" to be cut.

Unfortunately the 3d view is spoiled and the drawing view and flat pattern as well. I imagine we would have to manually correct the idw..

Can you please help to solve this issue?

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johnsonshiue — Fri, 14 Jun 2019 21:51:42 GMT

Hi! Please attach the new part here. The hole you added was not present in the file you originally attached.

Many thanks!

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Anonymous — Mon, 17 Jun 2019 06:07:43 GMT

ipt file is encolsed

Re: Lofted Flange refold failure

RonaldVanHam8261 — Tue, 02 Dec 2025 13:51:38 GMT

Hello everyone,

I just made a die formed lofted flange (cone)

I made a centred rip with a 2mm gap exactly on the intersection of the XY plane and te surface of the cone.

Then I need to unfold the lofted flange in order to add a certain hole pattern.

As the stationary reference I use the left side of the rip.

The part is unfolded as required and I've provided the pattern

After this I refold the part with ofcource the same surface of the rip as the stationary reference.

But strangely enough the position of the rip is on acompletely different position after refolding.

What am I doing wrong ??

I Hope someone can help me with this issue.

Many thanks in advance.

Best Regards,

Ronald.

Re: Lofted Flange refold failure

johnsonshiue — Tue, 02 Dec 2025 20:30:21 GMT

Hi Ronald,

Please share the file here. I would like to understand the Refold failure better.

Many thanks!

Re: Lofted Flange refold failure

SBix26 — Wed, 03 Dec 2025 03:26:39 GMT

As a side note, there is no need to use a lofted flange feature for a cone. A simple revolve will do the job, since cones are developable features and will easily flat pattern.

That said, I don't know whether a different modeling technique would give a different result in this case. Might be worth trying, though.

What version of Inventor are you using?

Sam B

Inventor Pro 2026.1.1 | Windows 11 Home 24H2

Re: Lofted Flange refold failure

heather_tracy — Fri, 26 Dec 2025 16:14:20 GMT

Hi @RonaldVanHam8261,

I wanted to check in and see if you saw @johnsonshiue's & @SBix26's follow up questions and you still needed assistance, or if you found a solution to your question already? Please share any available screenshots or screen recordings so the community can assist you further.

All the best,

Heather | Community Manager