How to create a Spiral / Helical Sheet Metal Model that can be flattened
Article by Wayne Chen, CSWP updated September 30, 2010
Article
If you want to create a spiral / helical sheet metal model, using the sweep feature + insert bends will not do the job.
You will need to use two different size helix / spiral paths:
Then, convert these curves to 3D sketch entities:
Now, use lofted bend to create sheet metal:
Flattened state:
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