In most cases threaded parts are designed without true surface (just cilynder with texture) thus part surface area is calculated wrong (less than it is i real world)).
I wonder if there any automatic way to get true value of threaded surface which is modeled in traditional (simplified) way?
Hi! Unfortunately, you need to create the geometry in order to get the surface area. You can either use Coil or Sweep command to do that.
Uma, What do you mean by True value of surface area? Do you want to know the extra mass the thread is adding to your model? or something else?
When i first read your post i thought of the extra mass that is missing because the thread is simplified. For an internal thread, Inventor is using the minimal minor diameter. If you use the minimal pitch diameter the average mass for the thread hole will be much better. I wrote an iLogic Rule that creates an user parameter with the corrected mass. The rule is for a simple thru threaded hole in a part with a thichkness d0 of 10mm.
You didn't tell which version you are using of Inventor, but i created this in 2012 hope you can have a look at the attached part.
...Also, you should look on the app exchange site for the free thread modeler add-in. This will automate the construction of the thread features for you.
Has this app been fixed? Last time I checked I thought it only did British Whitworth threadforms.