×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Create a solid body from negative space in drilled casting

Create a solid body from negative space in drilled casting

Create a solid body from negative space in drilled casting

(OP)
Experts,

I'd like a negative image of this part, so that all the drillings are solid and all current solid geometry is invisible/ removed.

Obviously I can use extract...

Any ideas?

NX5/6

Thanks


 

RE: Create a solid body from negative space in drilled casting

I'm not sure how cumbersome this might get when deleting the "leftovers" that you do not need, but one method you might try is to create a primitive Block that is a bit larger than your original model.  You can then subtract the original model from the Block feature.  You will have some extra bodies/faces left over where the Block extended past the original solid.  I'd then try using Delete Face to remove all the areas you don't need.  You may also have to Extract the planar faces that are the extents of the holes and Untrim them so they can be used to trim off the ends of the hole "fills" from the new solid body.

Hope that makes sense.

Tim Flater
Senior Designer
Enkei America, Inc.
www.enkei.com

Some people are like slinkies....they don't really have a purpose, but they still bring a smile to your face when you push them down the stairs.

RE: Create a solid body from negative space in drilled casting

What you ant is the amount of material removed IF you had started with a exterior machined block of that size.

Build a model that resembles the exterior shape of your finished part.
Then do a subtract of your existing model from the exterior shape model.
Be careful that the resulting shape MUST be a single solid entity. You may have to do some tweaks or add runners between the inetrior cavities to tie the model together. This used to be true, as I don't know if the multi-body limitation has been changed.
 

"Wildfires are dangerous, hard to control, and economically catastrophic."

Ben Loosli

RE: Create a solid body from negative space in drilled casting

(OP)
Tim/Ben, thanks, I'll give those suggestions a try in the morning it's home time in the UK!

RE: Create a solid body from negative space in drilled casting

you'd probably get an answer one of two ways. Using the block method and comparing the mass and volume of the block before and after you subtract the casting. Or if you want some fancier more functional geometry then simplify a copy of the solid by deleting the internal faces by regions etc. Then you can delete one from the other to produce a discrete model of the cores.

Best Regards

Hudson

www.jamb.com.au

Nil Desperandum illegitimi non carborundum

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources