Solid modeling by areas 1

[Robert000]

Hi all,

does anybody know how is it possible
to create areas, after that solid by areas
in autocad (not by intersection,substract,
extrude...).

Thanks

 

[cfee]

Robert-
Hi. Are you wanting to use regions to flat-model your parts before extruding (etc.) to 3D Solids, or are you wanting to take faces (surfaces) and model them to 3D solids?
I think we can get you where you want to go with a little more input.
Good luck,
C.Fee

 

[Robert000]

OK, here is an example.

Imagine a created cube in autocad created
as solid.
If you explode it 2 times you can get
simple lines.
My question is, that is possible
to get back areas, determined by these
lines, and after that create the volume
of cube.
I need to export volume to another program.

If I can solve this simple example I
can transform it to my problem, because I
have a hardly defined shape and it will
be the easiest way to create a volume.

Thnx,

Robert

 

[CarlB]

You can use the MASSPROP command to get the volume of a solid, as well as other properties.

 

[Beggar]

Sure, take your lines and make them a region. From there, ACAD will tell you the enclosed area.

Actually, I believe you can find the enclosed area only by selecting the points.

--------------------
Bring back the HP-15

http://www.hp15c.org

--------------------

 

[Robert000]

I have created the regions with region command
(6 regions at all). It works.
Now I would like to create solid determined
by these regions. But with massprop I get only
properties of the volume, but it doesn´t spoil
the regions.
I need a solid as an assembly part.

Robert

 

[Beggar]

Then extrude your region to make a solid.

I guess I don't understand what you're really trying to do. Your example makes no sense to me.

You want a solid but you don't want to extrude it. Can you rotate it?

Or, would you prefer to work with surfaces? If so, they don't have volumes (though they can enclose a volume).

Oops, I think I just realized what you want. You now want to determine a solid that is bounded by all of the regions, right?

If that's the case, I do not know of any way to do that in AutoCAD.

--------------------
Bring back the HP-15

http://www.hp15c.org

--------------------

 

[Beggar]

Here's what you could do:

1) Use the "box" command to create a rectangular solid that is larger than the enclosed boundaries of your various regions.

2) One by one, set your UCS normal to each region and then extrude that region away from the box

3) Create a new solid by subtracting all of the solids created in step 2 from the box in step 1.

It's a several step process but that might get you where you want to be (in terms of the end result).

--------------------
Bring back the HP-15

http://www.hp15c.org

--------------------

 

[Robert000]

It seems that the easiest way of solid modeling
of difficult shapes in Acad is extruding.
I have tried it before, and I thought that exist
another (maybe easiest)way (defined by regions).
It´s a good idea that is written by Beggar.
We can find the easiest solution by using
symetrical shapes, and then extrude - create
only the part of the solid.
The full volume we can get by mirroring of
the part (after that union).

Thanks Beggar for your comments,

Robert