Unfolded spiral sheet metal

It can't unfold the coils 360° because the pitch is too big compared to the different of Øint and ext of the coil.

By starting with 1/2 turns at 180° no worries.

I did the first 2, I'll let you do the next ones!

Principle below:

 


toboggan-2019-11-18.sldprt

On the other hand, the fact of doing everything in the same room weighs it down considerably...

In principle I prefer to cut into different pieces but you are free to do otherwise.

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I can't open your file. I'm on SW 2017, is that why?

But in this case, why don't 288° cuts (5 sections) work either? Is it because of the method I chose for the removal of material? 
I'll give you the version I made like this.


toboggan.sldprt

For the method, for each piece of coil I create 2 new 3d sketches with the sketch from each Helice/spiral converted into a 3d sketch then shortened and constrained in relation to a plane (top plane) then with these 2 sketches each time I create a transition fold. And there is no problem for the unfolded.

The 2 3d sketches of the 1st turn:

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If I understand your method correctly, in each 3d sketch you create a small part of the spiral? 
Maybe I don't know how to use the "convert entities" function to convert the spiral into a 3d sketch, but do we agree that it's not dynamic? If I have to change a dimension, I have to redo each sketch one by one (i.e. a small bunch of steps in total). 

Thank you very much for your help! 

Hello

Not necessarily a bunch of steps if you use variables that use basic trigo or a rating control table (@sbadenis will explain to you ;-) ;-) how to do it with a table).
 

PS: @sbadenis a super big Congratulations (I love it) for your proposal, it's super simple and tasteful and in one room on top of that. Simply Fortich'

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So I managed to get everything I wanted! Thank you!!

I admit that if you had a little tip to give me to make it dynamic, I'd be very interested, for now, I have to redo my 10 3d sketches each time for each modification of my spiral. 

I'm attaching my piece, if ever. 

Thank you again!


toboggan.sldprt

Hello

Small problem in your design, the 2 end points of the 3d sketch must be on the same plane passing through the center of the tube. To achieve this you create your 2 - 3 or more planes and then you constrain the endpoints of the 3d sketches on these planes and in addition it should be dynamic.

 

Even if I'm a fan of trigo Zozo_mp,  I'm also in favor of the least effort! So I let solidworks calculate for me!

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Oooh I see!
I had gone through a 5-segment split of my 3d sketch but your method allows more modularity afterwards! Bravo, it's great!
A bit tedious to constrain the 20 ends of the propeller portion, but the result is exactly what I want!

Thank you again and congratulations for the beautiful method proposed!


toboggan3.sldprt