Rolling flat design into a cylinder

[Jon Glassman]

Does anyone have any suggestions on how to roll a flat sheet with
specific dimensions into a cylinder with specific dimensions?

For example, if I have a flat sheet of width x, length y, and thickness
d with some pattern cut out of it, how would I roll that into a cylinder
of height y, inner diameter I, outer diameter O, and thickness D?

Thanks a lot,
Jon Glassman
glas...@stanford.edu

[Murry]

Hi Jon,

Start with the cylinder and unroll it to the flat sheet. btw .. is your
"d" a different value than your "D"? ... just curious.

Cheers.

glas...@leland.stanford.edu (Jon Glassman) wrote in
<394ABE8A...@leland.stanford.edu>:

--
phg gur purrfr ...
ahs frq

[Jon Glassman]

Thanks a lot for your response. I meant for "d" and "D" to be the same
(the uppercase was a typo!). My problem is that I don't know how to
unroll a cylinder into a flat sheet. Perhaps it's merely a feature that
my version of SolidWorks lacks: I am running 98 at home and have access
to 99 at work.

I have tried rolling a flat sheet into a cylinder and that nearly works,

except for the fact that it won't allow a 360 degree bend, only a
359.99... degree bend, meaning it's not a closed face. If you can help
me out, I'd really appreciate it.

Thanks again,
Jon Glassman

[per_o_hoel]

Jon,

I don't recall the specific version of SolidWorks that first included
the capability to unfold a cylindrical feature into a flat pattern;
however, I don't think you will find it in '98.

In the later versions supporting it, you can easily unfold your
cylinder (or large radial bend, as long as it's tangent to adjacent
faces), add a cut-extrude ("stencil") and then fold it up again...

Please note: The cylinder can NOT be closed (a full 360 degrees).It has
to have at least a very small gap, just as the real sheet metal part
would when made from flat stock.

Per O. Hoel
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