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## Inventor General

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Posts: 11
Registered: ‎10-05-2010
Message 1 of 5 (167 Views)

# Another flattening riddle

167 Views, 4 Replies
08-06-2012 09:21 AM

I am trying to model a hollow curved disk as we would build it; faces cut form 1/8" material and roll formed and a return of.0625 thickness spanning the two.  The three parts were devived from disk3.ipt.   The faces both flatten.  The return thinks it flattened but did not.  Each of the 3 parts has its sheet metal rules thicknes set to "thickness".  I have learned a bit searching for someone's simalar problem but not solved my own.  I am pretty sure that this will flatten without deformation.

Any insight would be appreciated.

Thanks,

Zak

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Message 2 of 5 (164 Views)

# Re: Another flattening riddle

08-06-2012 09:27 AM in reply to: zakaronius

Inventor can't unfold that.

Mike (not Matt) Rattray

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Message 3 of 5 (158 Views)

# Re: Another flattening riddle

08-06-2012 09:46 AM in reply to: zakaronius

Thanks for the quick response.

It seems that Inventor 2013 can not unfold this yet I find that very hard to believe.

Considering Dr Mather's comment regarding part2:

http://forums.autodesk.com/t5/Autodesk-Inventor/How-can-I-flatten-these/m-p/3465526/highlight/true#M...

..MIGHT be able to be flattenned;  clearly part2 has compound curves.  I would have thought it impossible to flatten without deformation.  My return seems to me as it would lay flat as anything.  I guess I'll try something different to prove or disprove that notion.

Thanks.

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Posts: 11
Registered: ‎10-05-2010
Message 4 of 5 (142 Views)

# Re: Another flattening riddle

08-06-2012 10:37 AM in reply to: zakaronius

Yup.  You are right, Mike.  Thanks

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Registered: ‎10-05-2010
Message 5 of 5 (62 Views)

# Re: Another flattening riddle

08-08-2012 05:56 AM in reply to: zakaronius

Still trying to solve what, seems to me, ought to be a simple problem.

Attached is a new version of the return that would not flatten.  A sweep rather than a patch between two surfaces.

No deleted faces.  Sheet metal environment  Thickness matches SM rule...

I exported this to Rhino where it does flatten yet it still will not in Inv2013.

Any insight?

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