Author Topic: Profile of a surface/point instead of flatness?  (Read 5626 times)

0 Members and 1 Guest are viewing this topic.

Offline eric37Topic starter

  • Newbie
  • Posts: 1
  • Country: us
Profile of a surface/point instead of flatness?
« on: April 10, 2024, 01:19:52 am »
So, a customer has asked for the flatness of some of their products to be checked after they were found to be quite bent. Unfortunately their drawing only calls for surface profile. It's a relatively straight edge, so I was thinking of either creating a plane from already programmed points to create flatness, or using the already called out profile for the points to work out the flatness.

Offline rubidium

  • Regular Contributor
  • *
  • Posts: 105
  • Country: us
Re: Profile of a surface/point instead of flatness?
« Reply #1 on: April 10, 2024, 04:28:27 pm »
How much/little is "quite bent?"  If it's on the order of 0.0001" or greater, wouldn't a good dial indicator and base, together with a granite surface plate suffice?. If the deviations are a lot smaller, you might consider checking the surfaces visually with an optical flat and (near) monochromatic light, say from a sodium-vapor lamp, and counting fringes.
 

Offline DaJMasta

  • Super Contributor
  • ***
  • Posts: 2318
  • Country: us
    • medpants.com
Re: Profile of a surface/point instead of flatness?
« Reply #2 on: April 14, 2024, 02:58:00 am »
Are you looking for a way to calculate flatness, represent flatness, measure flatness, or correct it?

For measuring, the above seem to be the go-to.  A heightmap of points and a little visualization does wonders for demonstrating it, but depending on the kinds of features and requirements of the part, a meaningful measurement for it has to be picked from a variety of potential representations.
 


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo
Smf