×
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

part inspection tools

part inspection tools

part inspection tools

(OP)
I am looking for a reliable & repeatable method/tool to measure a radius on a pipe. In our application we are making oilfield equipment that consists of a pipe with an "upset" (larger diameter section on an offset centerline). The radius (4" to 8" radius) we are trying to measure begins tangent with the pipe OD and ends tangent on a transition angle to the larger OD.

I found this
http://www.arcmaster.ca/
but don't know if we can pass calibration/certification standards for use. Any recommendations would be appreciated.

Louis

RE: part inspection tools

One simple and inexpensive approach is to make radius gages by using a CAD program and generate a arc on card stock. Plot/print the radius using 1 to 1 size. Laminate the card stock and carefully cut the radius out from the laminated card using the printed radius as a guide. If you find this acceptable make the template out of metal. You could make gages every 1/4" radius or whatever steps you desire.

RE: part inspection tools


Can you cut a section from the pipe and put on an Optical Comparator, those are reliable & repeatable and have been in use for decades.

CODE

http://www.starrett.com/pages/745_vb300.cfm     for example

==========================================
Business Card     http://mech.e.tripod.com
__________________________________________
Cycle Heaven.......www.tailofthedragon.com

RE: part inspection tools

You could also use a series of pegs in a board, basically making a Go/NoGo gage for the bent pipe.

"Art without engineering is dreaming; Engineering without art is calculating."
Steven K. Roberts, Technomad
Have you read FAQ731-376 to make the best use of Eng-Tips Forums?

RE: part inspection tools

I agree with MadMango a go/no gauge would seem the obvious solution as well as pegs for location and possibly clamps, maybe toggle a go/no go gauge could be wire eroded, laser cut or water jet cut.

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