wrap a flat surface perforated on itself

[Mxm]

Hi, guys.
I am not very present on the site because of countless commitments, but in the short time free, I follow you and read the answers to the questions asked.
I have a problem too, and to whom to ask if not on this wonderful site, full of experienced people?
I start by thanking those who can help me with this problem that I can't come to terms with. used software: autocad and rhino 5.
I started with rhino,(I just started studying with this software) to find the development of a planar surface obtained from a cylinder in perforated sheet, with a hole passing only on one side, and hence no problem, and is what I needed to do the program to insert into a wire electroerosion.
but my question is: how can I do a reverse operation? that is, starting from a rectangular planar surface, thick 3 tenths, with a passing hole, and wrap it on itself to get a cylinder? If someone also has some indications for autocad, I would be very grateful.

 

[PaoloColombani]

There are several ways to solve your problem. But you talk about a surface with a hole and you also talk about a thickness. for rhino a surface has no thickness and the hole is passed by force, while if you give it a thickness then turn that surface into a solid. However, the most immediate way to your case could be the command fold del menù transform. be careful that with that command you can hurt, maybe at the third input choose the option angle that maybe avoid pastries.

 

[Mxm]

There are several ways to solve your problem. But you talk about a surface with a hole and you also talk about a thickness. for rhino a surface has no thickness and the hole is passed by force, while if you give it a thickness then turn that surface into a solid. However, the most immediate way to your case could be the command fold del menù transform. be careful that with that command you can hurt, maybe at the third input choose the option angle that maybe avoid pastries.

start with thanking you for the answer and I will try with the fold command. Perhaps I have explained badly in my question and it is not a surface but a solid like you have clearly specified. rhino develops 2 planar surfaces that would be 2 surfaces related to the thickness of the solid, the external and the internal. So far no problem, but assuming that there is only one planar surface, can I wrap it on itself to make a cylinder? I will try with the fold command that I have never used (for the moment) but will it make a 360° turn?
For the moment, I thank you for your answer. I give you an example of what I should do.

 

[PaoloColombani]

you can, in the attachment I will rotate your file where you can see that one of the two surfaces has returned to be a closed cylinder exactly on its edge. I did not specify the angle as I said above but I used the limittospine option using as reference the diameter (as you see I left the line). see also that with this command the object has changed in its "mathematic" (it is known from the wireframe) but not in its geometry; basically the transformation generated a number of control points in more than the neccessary. to do a cleaner job I would have curved it "handed" but it is a much more complicated road and however the important is the result.

 

[Mxm]

all ok paolo and infinite thank you! I have another problem to finish the project. I should on the flat surface apply an irregular grid and then remove it, to eventually get a surface that looks like a metal canvas, and finally I would bend everything to get my cylinder. the grid bit I made it with closed and open nurbs curves that then I will have to multiply it and adapt it throughout the planar surface and finally proceed to the subtraction. My problem is, how can I multiply the grid because it covers all the surface and how to do it and then subtract it? I attach the design with the grid piece made.

 

[PaoloColombani]

I saw that you successfully folded the other surface. for the grid pattern you cannot operate a subtraction because you have a surface and not a solid. you can multiply your reason with array functions from the menu transform, or simply by incrementally copying the reason by reference to a precise span. once you create your complete pattern, even exceeding the edge surface size, you'd better transform it into a Group so you select it easily. with your curve pattern you can simply cut the surface or extract the curves from the surface with which you cut the pattern and then transform your flat curve complex into the surface (command: _planarsrf that you find in the surface menu).

 

[Mxm]

again thanks for the directions and I will do as you told me!

 

[Mxm]

I did everything but I would like to know one last thing and then I don't ask anything anymore because I feel like I've already bothered you enough. created the pattner, and then grouped into a group, I truncated it from the planar surface obtained from the development of the cylinder, but now I find myself with 7644 nurbs surfaces that do not join each other and I can not join the whole in a single surface, but I have to select every time the whole area, this is because in the truncature between pattner and planar surface, has cut what in reality had to remain. Surely I've made a mistake in the selection process, can you take a look at it? .... despite everything, the fold command worked equally though the surfaces between them are not joint.

 

[PaoloColombani]

probably for some unknown reason the split operation generated an exception and came out a mess.

I did a test that gave the desired result. Unfortunately, I can't load the annex, although it's probably too heavy. However I moved in this way:

I projected the pattern on the surface (command: _project);
cut the surface (command: _split) with the applied pattern;
selected the cut surface;
then: _invert, _delete,
... and thus eliminating the rash remains the reticulated surface.
then I rebooted it to form the cylinder (command: _bend).

it would not be necessary to project the pattern on the surface, however thus raising the algorithm from unnecessary calculations that could also generate abnormalities.

 

[Mxm]

hello and thanks for the info.
with all the real image the file gets heavy and I cut it all into a small surface to test.
I tried to do as you say and after projecting the pattner on the surface, there was no need to cut it, because hiding the patner already remained the surface with the applied pattner. I had some problems after isolating the forms (closed curves) from the surface, and I had to select one by one, all together did not give me the possibility. I preceded:
1)Patner project on surface
2) pattner plaster and remained surface with applied pattner
3)used the truncated (trim) and selected to one to one all the curves to be truncated.(result in attachment to rolled filter)

tried the solution told by you but cut me the part that should not be cut, I will try again as soon as I can.

option using autocad 2016, but I want to learn rhino.
procedure: 3d modeling, projected pattner on surface with automatic cut activated and variable 1, and my surface realized in an instant.
I thank you so much for all the help you have given me and I continue in rhino studies, a program that fascinates me. thank you for everything and your patience