Flatness gaging method
Flatness gaging method
(OP)
Because the rollers that we manufacture are up to 15" in Dia. and 230 inches in length, a stationary gage was to much expense for this company. A portable apparatus(hat if you will)which is 12" long with 45 degree angles was created to be placed on top of the roll with an indicator placed centrally.The indicator has a ground flat on it. This unit is then pushed across the roll at a distance of 24" with software hooked up to the indicator measuring the variation in 24 " Some say this measurement is flatness others say it is profile. I say it is not an accurate way to check anything.
What do you think?
What do you think?





RE: Flatness gaging method
John-Paul Belanger
Certified Sr. GD&T Professional
Geometric Learning Systems
RE: Flatness gaging method
Powerhound, GDTP T-0419
Engineering Technician
Inventor 2010
Mastercam X5
Smartcam 11.1
SSG, U.S. Army
Taji, Iraq OIF II
RE: Flatness gaging method
Evan Janeshewski
Axymetrix Quality Engineering Inc.
www.axymetrix.ca
RE: Flatness gaging method
I believe there was an idea behind this setup.
RE: Flatness gaging method
Is that right?
That would measure some combination of geometry between the points of contact of the two sides of the V and the indicator.
Since you have no way of knowing if the indication is because of something directly at the indicator location, or due to the V contact patch not being "perfect" you really have no idea what you are measuring.
RE: Flatness gaging method
RE: Flatness gaging method
How much is enough?
Let's for a second pretend that the V block is "perfect".
V block __________________
Cylinder /\___/\___ __
^^^^\/
Is that "enough"?
RE: Flatness gaging method
Powerhound, GDTP T-0419
Engineering Technician
Inventor 2010
Mastercam X5
Smartcam 11.1
SSG, U.S. Army
Taji, Iraq OIF II