drawing a "real" thread or screw......

[Horst]

http://tcmacforum.imsisupport.com/index.php?topic=36.0
Found this only.....

But this I also like to know... how I can draw a 3D screw includig the thread.
Any suggestion?

[Horst]

"For the threads you could sweep along a helical spline, .......

Can anyone explain this to an old 3D newbee?
Thanks a lot!!

[Hocus Focus]

Hi Horst,

First you need to work out how wide your thread needs to be, and the pitch. The pitch is the distance from one ridge on the thread to the next.

Find the helix curve tool and set it up to draw the helix you need.

For example, lets do a 10mm dia thread with a 1.5mm pitch.

Put this info into the thread tool and then drag a line to draw the thread. Type a length in if you need a specific length.


Next you need to find the end of the thread, so it is facing the 'camera'. Use the views options and find whichever one works to show you an end on view of the end of the helix.

Next, draw one tooth shape. make sure the flat edge is 1.5mm (whatever the pitch is). I find it best to group this together now to make it easier to do the next bit.

Take that tooth and snap the midpoint of the flat edge to the end of the helix.

Next find the sweep along path tool, click the tooth, then the helix, and it will make a thread.




Pete.

[Hocus Focus]

[Horst]

Thanks hokus focus!
I will try this later today.

[JBorlaug]

I needed some specifics, so I found this (location) and info. I'll look in my machinery handbook and get the details for class threads, and post a
scalable dxf.
Johnny