So for this strictly personal project called "waterfall without water" I have a very simple piece but it doesn't want to go flat in its entirety (glups!)
The problem is located on the Boss-extru 8 sketch. I could get away with it by doing otherwise but a chtit' explanation on that that I don't care about it would be nice.
Hello @Zozo_mp , Good to see you again on the forum. For me, 2 things are wrong with your coin:
Boss-extru 8 with a different thickness of the base plate, SW doesn't like it too much. - the removal of material before conversion into sheet metal work?!? don't understand...
I would have done like this: a direct fold and if necessary you touch up the sketches of the fold to ensure your notching. Here is the file in 2022 version made with the 2024... Tôle_de_base_-V1_2024[1]-a.eriaud.SLDPRT (207.7 KB)
Hello @Zozo_mp, why not go straight to sheet metal? The fact of starting with an extrusion and then a conversion to sheet metal complicates the thing for the developed.
Hello, Cool retirement To be able to unfold your thing you just have to add straight lengths after your extrud 1 at each end, then do your conversion to sheet metal. For your information, no machine can end up on a sheet metal rounding. You need an extra length in rolling and a straight part in crunching.
On the other hand, everyone is right, your design is not great, not great!! Going directly with the sheet metal module would have removed a lot of sketches and other inconveniences.
To go! Courage, it's almost the end of your apprenticeship! Fair winds
Mr. (Master) @Zozo_mp !! Glad to see you again / reread (really let anyone in here... ) I like the previous comments: The heterogeneous thicknesses, Solidworks doesn't like it! …
I don't know the equipment at your disposal but you will need a metal sheet .472.15 x 235 x 1mm... and a big hammer. (this is the first time that the has tested the flattening of a surface ... it's not bad at all this function...).
The capable rectangle is probably that of the unfolded Sheet Metal (the radiated areas have remained ... radiated). At the Flat Surface quotation: length Vs Perimeter the difference is 0.002mm, it remains reasonable for this type of realization. But, yes, this type of review is to be reserved for " information only ".
With the sheet metal module, if you want to make a bend with a radius of 50 for example, you will need a higher value of the length of the folded sheet. Value to be adjusted according to the V you will use on the press brake, of course if you want your part to be feasible!!
Hello @a.eriaud Well done for the thickness error. In reality I made a stupider mistake because instead of doing the method like a dad. We draw everything flat and we make the folds after I wanted to do it in direct 3D and bam, I made a mistake that I'll talk about later with a new part.
!! Glad to see you again / reread (really let anyone in here... 
)
