external and internal threads

Helle
Does anybody know about they way to create external thread to a
cylinder and internal threads to nut in solidworks 2003. if some body
can send me the solid part files for external threaded cylinder and
internal threaded nut as an example, please let me know. Cheers and
Good time S Minhas

 

Sweep along a helix is the best solution for this geometry.

Check out 3D content central for examples, do not have any 2003 files.

Jeff

 

As Jeff says you can use a sweep along helical path to get the
geometry. Then maybe use a cavity feature in the assembly create
matching geometry on nut. But performance will be pretty miserable
because generating helical sweep cuts is tough on SW. If this is a one
off thing then go for it, but generating threads is best left to
cosmetic for performance reasons.

 

I would be inclined to build the nut from scratch, rather than using the
cavity feature. Cavity is one of the less reliable and more fussy of SW
features. It will also give you a nut with no clearance to the external
thread, which is not the way real internal threads are usually done.

If you really must make a real thread, don't make it one long helix. Make a
short helix, say one pitch, and pattern it. Saves a lot of rebuild time.

Jerry Steiger
Tripod Data Systems
"take the garbage out, dear"

 

I cannot help you with files that version 2003 would be able to read ,
however I have created a step by step outline of the basic threading
procedure, in the .doc format, made up of about 15 steps, that you are
more than welcome to if you want it. It is designed to be understood by
Newbies such as ourselves. It is for a hex head bolt, with a machine
cut SAE thread. It follows that the basic principles included in this
outline will apply for the drawing of the internal thread as well, you
will have to refer to SAE charts regarding acceptable thread clearances
and thread classes. A "Machinery Handbook" will provide this
information.
E-mail me and I will be more than happy to send you the .doc file. I
will also send you pictures in the .jpg format of the cut threads.

Good luck,
G. De Angelis