cut a surface

[vincenzoquovadis]

Hello, everyone. .
It's my first message, and look at it to solve an insurmountable problem for me.

I have the basics of the 2d of the autocad, and this is my first file in 3d.

we come to the problem:
I can't cut the two surfaces that close the internal toothing.
the latter was much longer, and I managed to cut it over the two floors that close it, but now I can't eliminate the portions of the surface I want.. .
I'll get you the file. .

thanks in advance..

 

[Zanna_Bianca_]

I unfortunately have a rendering in composition, and I can't open the file... Did you try "surftrim"? if they are surfaces without thickness... If not you could create solids and intersecting each other, subtract them, separate them, and erase what you don't need

 

[vincenzoquovadis]

I tried with the "surftrim" command, but the 2010 autocad doesn't know it...

If I try to convert it into solid, it answers "impossible to convert an open curve".
just for those portions of the surface I have to cut. .

 

[Tristan]

I tried with the "surftrim" command, but the 2010 autocad doesn't know it...

If I try to convert it into solid, it answers "impossible to convert an open curve".
just for those portions of the surface I have to cut. .

test with the underscore (_) in front.

 

[vincenzoquovadis]

yes with the "_" works from the command line, but it is the same size I used earlier.
precisely, when I cut a piece of surface, it does it correctly at the point I chose (the top part), only that together I also cut another piece in an opposite area (bottom)

 

[Zanna_Bianca_]

have you selected as cutting limits all gear plans? ...and you tried to create a solid that crashes there, and stealing it?

 

[vincenzoquovadis]

Yes, I have selected all the faces of the teeth. .
I resigned. . .

Now I'm trying to convert the revolutionary piece from superfice into solid to be able to subtract, but a mistake comes out:
"Impossible to convert an open curve.
impossible to convert objects 36."

Where am I wrong?

thanks in advance

 

[Zanna_Bianca_]

At this point "cap" the holes of the gears that you already have with custom-made surfaces (you create one, the mirrors on the other side, and you arrange them to autocad along the path of the circumference), and take away the others that you don't need anymore, I couldn't tell you anything else, and at this point I would personally do so... if some expert can not advise you something faster. . .

 

[GP.]

opting for the construction of that model with the surfaces you complicated your life, if you really need these it is better to build it with the solids and then explode them later.

However, if I have understood your problem well, you could solve by drawing a polynea on the edge of the gear, extrude it (creating a solid) and subtract it (_subtract) from the surface.

made with 2011, but I think that even with 2010 you can.

 

[vincenzoquovadis]

I changed the tooth profile into a polyline.
I extruded it as solid.
I moved her to the center of the hole.
I hid, but he left me the "empty" faces. .

At this point I should, before subtracting the "male" teeth, make the piece become a solid, but I can't.. .
I press that when they revolutionize the profile, it asks me if as solid or superfic.
I obviously choose solid, but always recreates an object of "empty" surfaces.

 

[Ezio Olivato]

opting for the construction of that model with the surfaces you complicated your life, if you really need these it is better to build it with the solids and then explode them later.

However, if I have understood your problem well, you could solve by drawing a polynea on the edge of the gear, extrude it (creating a solid) and subtract it (_subtract) from the surface.

made with 2011, but I think that even with 2010 you can.

I agree with what I say. If you have to get a solid as described by the images you should operate the generation directly with solids.
it would be more practical if dwg could be read in formats prior to 2010, many other users would cling to the construction exercise.

 

[AntonioV]

would be more practical if dwg could be read in formats prior to 2010

for those who want to try, just convert them to their own version by This is free tool autodesk.. .

:

 

[Ezio Olivato]

Thank you so much!

 

[vincenzoquovadis]

I didn't think about it.
Now I saved it compatible with autocad 2000.

 

[Ezio Olivato]

Given the complexity of the solid, if you can obtain the section from your data and create a contour, with which to realize a solid revolution it will be easier to perform the boolean subtraction of the gear without loss of surfaces.
Good job

 

[vincenzoquovadis]

thanks to your help I finally managed to complete the design.

The hippo was indeed in the profile of revolution.
By fixing a closed profile of lines and curves, I can't get a solid.
with a polylinea yes.

Here's the job. .