How to make unwrapped drawing of a tube

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1

Hi,

I have a model of a tube, with specific holes and assets on it, and I’d like to get a drawing of an unwrapped tube, i.e. - a flat view of the tube’s outer surface, so I can print it with 1:1 scale and wrap it around the real tube and make whatever I want.

The same goes with other bended bodies - their drawing always appears as a projection, not as an unwrapped surface of the whole piece. In general - it would be nice to have a drawing of a face.

How can I achieve this result now? Thank you!

2

Hello,
3,1416 x diameter = length of unwrap tube
the height is the same as your model

3

Thanks - yes, I know the formula for the circumference of a circle.

The question is how can I project the tube onto a rectangle with one side - the length of the tube, and the other - π * diameter of the tube, with all the holes and elements on the tube, in the right places.

4

There is no wrapping/ unwrapping function in Shapr unfortunately. You can divide the tube into pie like sections and align them in just the right way to project to a plane or face. The smaller/more pie sections the more accurate the projection.

Similar to this (there are others by searching wrap cylinder) Accurate method to wrap a sketch to a cylinder

5

Hi,
While waiting for this function to be added to Shapr, I am juggling with MoI3D and Shapr3D.
Attached is the .shapr file and 2 screenshots.
I create my sketch in Shapr and Export in DXF.
In MoI3D,I extrude the cylinder and I use the tool > Deform > Flow to wrap the pattern
I export it in DXF but you can choose an other format.
In Shapr, I import in the project.
Et voilà…

screen2
screen21920×1692 158 KB

screen1
screen11920×1850 124 KB

Wrapp&Unwrapp.shapr (70,2 Ko)

6

Many thanks, I’ll give it a try!

I hope the feature arrives soon - not only cylindrical objects, but any bended one that you’d like to laser cut, for example, relies on this feature.

7

Hi,

As I’ve attempted to try it - this procedure doesn’t seem to work for me. First of all - I don’t have a sketch which I’ve wrapped and I’d like to unwrap - if I did, I’d be using directly the sketch.

I have a body which is constructed with booleans, several sketches, etc. - I’d like to unwrap the outer surface of this body into a sketch which I’d be able to print, cut, etc.

I did downloaded Mol3D and gave it a try, importing the body (which went fine), but failed in my attempts to get an unwrapped surface out of the body.

Any other suggestions? Thanks!