×
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

matched set drawing

matched set drawing

matched set drawing

(OP)
Hello,
In my case, two parts are machined as a set, some features like bolt holes, pin holes, grooves, etc are machined this way. There is need to separate the two parts before assembling them. During assembly, pins used to fix the two parts during machining are used to ensure the two parts are positioned to each other as close to machining as possible.
So in this case, can I treat these two parts as a set and create matched set drawing for it? If yes, can I treat a feature formed by portion of the feature on each part as a single feature? For example, each semi-cylinder on each part, can I call up the finished 360° cylinder as a single FOS?

I've looked up Y14.24 and think the answer is no. But I still want to see real life experience.

Thanks for sharing.

RE: matched set drawing

Neglecting issues associated with keeping the parts paired over their lifetime and assuring that pairs are not mixed, I have to ask how you inspect the whole cylinder while its halves are separated. If that seems like a fuzzy answer, well, I'm a little fuzzy on the question.

But it raises another question: If you had the parts machined separately on CNC equipment, would that provide enough accuracy to obviate the need for machining the parts while paired?

I.e., you don't see many jig borers these days because many CNC machines are good enough to do that work.

Mike Halloran
Pembroke Pines, FL, USA

RE: matched set drawing

(OP)
What if we inspect the whole cylinder while the two halves are still paired?

Quote (MikeHalloran)

If you had the parts machined separately on CNC equipment, would that provide enough accuracy to obviate the need for machining the parts while paired?
I tend to say no. In addition to accuracy, machining a pair can also save some machine time.

RE: matched set drawing

They can be machined together and checked together. But, they are two separate parts, two separate drawings.
Tolerance them the same, let the CNC machine them accurately.
I do this all the time. I machine the majority of the parts separately, then bolt/pin them together to machine the matched portion. Also drill for alignment pins while together.

Chris
SolidWorks 11
ctopher's home
SolidWorks Legion

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