special thread 3d hole with autocad 2010

[rancapas]

Bye to all,
I am drawing jaws to clamp a medium diam spring 10.8, wire section 1.6 mm.
I already designed the thread propeller (average diameter 10.8)
and carried out sweep of the circle (see attachment). the problem is this:
why by using the "sottrai solid" function (by adopting the thread to the whole solid) do not remain the internal profile on the solid?? Do you have any advice?

Thank you.

 

[GP.]

try rebuilding the main solid with history.

 

[Tristan]

how is the variable delobj set?

 

[rancapas]

hello the value of theobj currently is 1

wait news, thanks

 

[Tristan]

try setting it to 0 and see if something changes

 

[rancapas]

I set it to 0. I erased the regenerated solid from the sweep, swept,
removed the solid propeller from the other solid, but nothing changes.

Do you have any other instructions?

 

[Tristan]

Put an image on it. ..because I'm afraid I don't know what you're missing.

 

[rancapas]

attached to the image.
My intention is to get the hole thread
inside, using the spring to the piece. Is that right?

 

[Tristan]

Yes, but you don't understand what doesn't work... what's going on and you don't want it to disappear? The spring?

 

[rancapas]

Hi.
I'll attach the picture of the piece I need to draw. what I have to get is
the thread groove.Referring to the drawing I posted in the previous msg, if I use you will remove the spring from the piece, why don't I get what I think? the function will remove, for example, with the solid cylinder working properly. because with the solid spring obtained with sweep of circle on propeller,
No? ?

Thank you, I hope it was quite clear.

 

[Tristan]

Now I realized... I tried to download the file and I learned that to autocad your spring in that position he does not like. already if the move of a mm to the inside the subtraction works. I don't know why

 

[rancapas]

....ahhahahaah, great answer. The important thing is that it works without knowing why. That's okay. Thank you very much for the time dedicated to me. :finger:

 

[prismacad]

I think it is because the diameter of the "filettatura" is self-intersection and this creates problems during Boolean operations
try to make the spring diameter a little smaller and you will see that the subtraction operation will work
Hi.

 

[rancapas]

eh si...to the end it is enough to make the diameter of the increased propeller of 0.1 regarding the
diameter of the hole:angry:. putting the diam propeller equal to the diam hole does not work the subtraction. Thank you!