In the 3D PDF there is nothing can you send your Solidworks file or in neutral format (STEP-Parasolid)? I'm in 2016, I'm specifying part of the sending of the original Solidworks file...
At first reading I see two things, or rather two basic hypotheses
This is the way material removal is done in Inventor and the removal of material after rolling.
I guess we originally did a sheet metal conversion after making a cone in a boss base/smooth base.
Where it gets complicated is that you just want to do the conversion without having to take the part(s) again, otherwise you do the removal of material in the original flat sketch.
Just for the record, I can't go through a sketch on a plan (1/3 of a cone) and make an extrusion. A flattened shape is created in the lower parts of the waves.
Sorry but the part of @ac cobra 427 works well. To have it unfolded, simply delete the fold1 function (penultimate line).
No longer use the "Unfold"" function in the last line. I did an MEP with the cobra @ac file and it works to have the part flat.
Yves I went for a less elegant and more complicated solution than @ac cobra because I wanted to reuse your sketch without changing it (obviously it's more complicated).
A little question of pure curiosity! how are they going to make the part in the workshop by rolling or with four folds not easy to do except on CNC bending machines
In any case, your problem is very interesting , we learn a lot about cases like this. So thank you :-) :-)
I'm already in SP2. That's the thing that makes me sick to spend 4 hours doing something that only takes 5 minutes... I'm going to get back to SW 2016 and test...
@AC Cobra: Even though I record your piece in 2018, it works.
For your information, the part is simply rolled. A disc is then added inside to correct the lack of deformation of the upper parts.
It's curious because the Cobra @ac part works by taking the precautions I indicated to unfold.
When you say [[except that you would have to calculate the radius of the waves according to the angle of the cone.]] it means that the sketch of your drawing was not good. The method of doing the ripple flat like in Cobra doesn't suit you, I thought it was not bad.
Maybe I don't understand the result you expect!!!
That said, for the problem of the unfolded that gets stuck in the V 2018 it's curious that there is a functional regression in sheet metal.
These are the computer games... Sometimes I make parts and it doesn't work at home and my colleague the exact same station with the same configurations and at home it works... Who knows...
I had thought about it too. When I saw that it didn't work in sheet metal, I wanted to do it in surface. But it didn't work either...
Well in the end, it's just that SW 2018 is a big mess full of buggs... (it's not because I wasted 5 hours searching that I'm saying that, it's really a pile of mud...)
Well, I'm in a hurry, I reinstalled SW 2016 Sp5 as well as SW 2017 Sp4 and it doesn't work any better than with the 2018 Sp1 or 2. At home, I have an old 2016 SP4 and it works just like AC CObra. Anyway, since I spent 8 hours making a simple cut cone and it still doesn't work under SW, they will be entitled to an stl file for 3D and a DXF for laser cutting.
That's what I like about SW, we don't fix the old buggs of 10 years and we are given "new features" every year. As they must think that it works too well, they add a pair of buggs here and there.
PS: Sorry but I have a gut in my head that is starting to swell.
I don't have SW at home but have you tried to do the opposite, i.e. to make a volume with the wave and then convert it into sheet metal? Unfortunately I can't do the test today.
The only thing I don't know anymore is how it manages the starting sheet on a cylinder. (I do it regularly on cubic sheet metal)
Edit: it's really time for me to install SW at home even if it means transferring the licenses
A preview of the finished part in Inventor:
An overview of the room under SW: