pipe command in rhino

[rafita]

Good morning, everyone.

I have a problem with the _pipe command of rhino.
I will explain to you a moment to understand the problem:
Basically use autocad and I designed a prototype for a client in autocad and 3dsmax. I generated some spline to create some kind of helmet. (fig.1)to these splines I had to give some thicknesses that in the case varied from 1.5 to 2 mm. in 3dsmax I used the command sweep (fig.2) that generates surfaces. unable to export this model from 3dsmax in a format *.iges o *.stp I tried to do it in rhino, according to someone's advice, using the command _ and so from rhino I can export an iges or stp format.
I do not know if with pipe the model I create is a solid, but having to create a prototype, engineers tell me that the model inside is empty and they want it full. at this point I believe the command pipe of rhino is similar to the command sweep of 3dsmax.

I hope I've been clear. Does anyone of you know how to make this model a solid?
Thank you.

 

[flaviobrio88]

the helmet must be done as you see it?
I mean, like, retina for hair?
the prototype you're going to do with a 3d printer?

 

[TECNOMODEL]

rhino always works with surfaces, all you create inside is empty.

if however it is done well, without open edges, good etc. you can use it quietly for a prototype.
If engineers who ask you solid if they turn it into .stl then they can use it quietly to make us a 3d print.

 

[rafita]

the helmet must be done as you see it?
I mean, like, retina for hair?
the prototype you're going to do with a 3d printer?

Hello flaviobrio88, sorry I'm late.
Yes, it must be done as you see it. I will print it with a 3d printer in pc and they asked me not a stl, but an iges or stp, but I didn't understand why... Now they tell me that inside is empty, then I thought that the whole structure was not solid.

 

[rafita]

rhino always works with surfaces, all you create inside is empty.

if however it is done well, without open edges, good etc. you can use it quietly for a prototype.
If engineers who ask you solid if they turn it into .stl then they can use it quietly to make us a 3d print.

hi technomodel and sorry for the delay.
So you're telling me that if I carry out this model created with "pee" always generates and only surfaces?
as I answered above, they do not want a stl file but an iges or stp format. and sincerely I do not understand why...
I wanted to know if precisely exporting to iges I always have surfaces... and there is no possibility to convert it into solid

 

[rafita]

sincerely not knowing how to use rhino I do not know if there is a solution to apply solid "thickness" to splines.

 

[PaoloColombani]

in iges or step (and not only) a solid is simply a closed polysurface.

 

[rafita]

in iges or step (and not only) a solid is simply a closed polysurface.

You mean this right?

 

[mariuss.r]

You mean this right?

a solid is nothing but a set of surfaces or polysurfaces that enclose a volume.
if you create a sweep1 surface using a straight line as a trajectory and a circle as a section you get a circular tube with open ends and this is called a surface.

if you then "cap" the two ends with the _cap command in the solid menu (I don't know' in the Italian version as it is called ) you get a closed polysurface that encloses a volume ....so a solid, of which you can calculate volume, weight etc. etc.

The _pipe command automatically does both things, creating a tube with the ends, a solid so.

then you will have to join all the pipes in one solid, using the _union command (union) that you find in the solid menu...

see image and file attached

ps: if the engineers you talk about use a solid modeler (sw , proe or similar) I suggest you export the model to *.stp or better still in acis *.sat

 

[mariuss.r]

integration :

How do you understand in rhino if a polysurface is a solid?

pressing the f3 button opens the property window of the selected object ... pressing the details button the features are listed ..if in the definition the following indication appears

geometry:
valid polysurface.
closed solid polysurface with n ... surfaces.

allora questo e' un solido ..se invece appare :

geometry:
valid polysurface.
polysurface with n... surfaces

allora non e' un solido...

 

[rafita]

a solid is nothing but a set of surfaces or polysurfaces that enclose a volume.
if you create a sweep1 surface using a straight line as a trajectory and a circle as a section you get a circular tube with open ends and this is called a surface.

if you then "cap" the two ends with the _cap command in the solid menu (I don't know' in the Italian version as it is called ) you get a closed polysurface that encloses a volume ....so a solid, of which you can calculate volume, weight etc. etc.

The _pipe command automatically does both things, creating a tube with the ends, a solid so.

then you will have to join all the pipes in one solid, using the _union command (union) that you find in the solid menu...

see image and file attached

ps: if the engineers you talk about use a solid modeler (sw , proe or similar) I suggest you export the model to *.stp or better still in acis *.sat

hi marius and thanks for the support.
So if I didn't understand badly, in summary, with the _pipe command I have a nice and good solid?
basically what I did with pipes is a solid?

I just went into property and the object is type: closed polysurfaces. Also when I give the union command does not unite me anything... I am overcoming the problem in the old autocad way by giving the extrusion of the circle on the polylinee3d and seems to work (although the final model I get is slightly sharp compared to what I got with the pipe command in rhino.