Automating variable inspection - Calipers, micrometers, and optical comparators

ScottK

Not out of the crisis
Staff member
Super Moderator
#1
He everyone. I guess this is my first "Real" post.
anyway - I'm looking for a faster way to measure outside dimensions (and even some inside dimensions if possible) on a threaded part. We make valves - relief valves, check valves, etc and this would be used post machining to check component parts, as opposed to assembled valves.

Currently we use calipers, micrometers, and optical comparators to measure diameters, thread pitch, length, etc.

I would like to automate this in order to speed the first article and in-process inspections.

I was wondering if any of you might have a recommendation.

I've used OGP's Smartscope in the past for extrusion profiles, but this is a pretty complex device and would take a lot of training if I would want machien operators to do their own inspection some day.

Thanks!
 
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Paul F. Jackson

Quite Involved in Discussions
#2
Use a laser micrometer.
Search laser the internet for "laser micrometer"

Caution
1) surfaces must be clean
2) centerless ground valves must free of odd lobbing otherwise the measurements will not reflect the true OD.
3) measurements should be made at a slight angle relative to the grinding lay or else the the resolution will vary due to the surface finish.

Paul
 

ScottK

Not out of the crisis
Staff member
Super Moderator
#3
Paul F. Jackson said:
Use a laser micrometer.
Search laser the internet for "laser micrometer"

Caution
1) surfaces must be clean
2) centerless ground valves must free of odd lobbing otherwise the measurements will not reflect the true OD.
3) measurements should be made at a slight angle relative to the grinding lay or else the the resolution will vary due to the surface finish.

Paul
thank you. I will look into it!
 
D

David Hartman

#4
You might want to look into a portable articulating arm CMM (such as those offered by Romer or Faro Technologies). These can be equipped with laser-based visual measurement devices, and are relatively economical (extremely in-expensive for a CMM).
 
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