Go No-Go Guage for Ring
Go No-Go Guage for Ring
(OP)
Hi How can i ensure correct ring size in mass production environment? How to sort mixed ring?
Ring Size as follow:
ID x Thickness x OD (mm)
25 x 3 x 35
25 x 2.94 x 35
25 x 3 x 34
Thanks
Ring Size as follow:
ID x Thickness x OD (mm)
25 x 3 x 35
25 x 2.94 x 35
25 x 3 x 34
Thanks





RE: Go No-Go Guage for Ring
Cheers
Greg Locock
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips.
RE: Go No-Go Guage for Ring
For small quantities, hand operated, a couple of simple go/no-go guages would work fine.
A 24.9mm rod mounted "through" a 35.01mm (or 34.01mm for the other size) hole would sort out the OD/ID. If the ID is OK but the OD is too big they would catch on the "hole" and if the ID was no good they would either not go over the rod or again would catch on the "hole". Then as GregLocock says, two slots, one for each thickness.
If you are talking large numbers then it would start to get expensive. You'd need an automatic system similar to that in a coin operated machine, that checks what coin has been put in and sorts them.
RE: Go No-Go Guage for Ring
RE: Go No-Go Guage for Ring
"Art without engineering is dreaming; Engineering without art is calculating."
Have you read FAQ731-376 to make the best use of Eng-Tips Forums?
RE: Go No-Go Guage for Ring
You basically need to logically set up your steps to make the proper decisions at each test to catch all the parts.
You might be able to check the thickness with well built parallel plates. Although hopefully you aren't expecting modern sheet/strip steel to hold 0.0024" (0.060mm)
Sandvik, Hitachi, Eberle, and possibly Paturle can, but Ive only seen it in flapper valve grades. In the usual steels on the secondary market, 0.1157" and .1181" are basically the same thickness.
(and dont spin the micrometer)
RE: Go No-Go Guage for Ring
Mike Halloran
Pembroke Pines, FL, USA
RE: Go No-Go Guage for Ring
I thought I knew about most obscure pneumatic control gadgets, but I've never heard of an air gage as I imagine it in your context above.
Could you explain what it is, and how it works?
RE: Go No-Go Guage for Ring
Now, if a thick ring passes by, the backpressure on the air gage, measured between the jet and the limiting orifice, rises.
If a thinner ring passes by, there's more clearance between the ring and the jet, hence less backpressure.
I'm actually a little fuzzy on the internal details, but I think that's the essence of how they work. We used them at Ford in the sixties to measure bearing diameters on axle shafts. They can easily resolve 'tenths' of difference from the master they're set with. I don't think they have a large measuring range, and they may not be linear, but in an application like this, you don't care. All you're sorting for is 'is it 3 mm thick, or a little less'.
There was actually no stated requirement to measure the absolute value of any of the provided dimensions, only to detect differences so as to discriminate and sort a flow of similarly sized but distinct pieces.
Mike Halloran
Pembroke Pines, FL, USA
RE: Go No-Go Guage for Ring
RE: Go No-Go Guage for Ring
RE: Go No-Go Guage for Ring
RE: Go No-Go Guage for Ring
We have a Datamyte system that has electronic calipers hooked to it. Then one in every 5-10 parts is pulled out and the operator measures the key dimensions. These dimensions are put into the Datamyte and voila... it gives you a nice histogram showing the Cpk of said dimensions. As long as you are getting a good Cpk, the parts are fine. A go no go gauge is ok, but it does at times become time consuming to use for rings because of their small nature.
RE: Go No-Go Guage for Ring
I agree with a statement above that it depends on the manufacturing process. I would hope these rings would be produced on seperate machines, or the same machine at different times. By looking at such a small difference in size, I would think this would be way to large of a potential for contamination. This could be a real problem in your PFMEA.
Just an idea, but you could also go by the weight of a part. Since the smaller part would weigh less have a sensor that they pass over detect the weight and then sort accordingly.
RE: Go No-Go Guage for Ring
Sometime in 1967, I attended a tryout party for an engine assembly machine. It measured incoming piston assemblies for OD at several locations on the skirt, and shuffled them into one of maybe six queues, based on size. It measured the bore of each cylinder and inserted a piston from the appropriate queue to get just the right clearance. That was just one module; the complete machine was bigger than my house. Later that week it would be knocked down and reinstalled at the customer's site.
No computers, no PLCs; all relay logic.
Highest tech component:
The station for cleaning incoming blocks had a fire- hose sized fluidic oscillator for blasting chips out of the cooling cavities. A quick demo got everyone wet.
Mike Halloran
Pembroke Pines, FL, USA
RE: Go No-Go Guage for Ring
http://www.westerngage.com/extgageframe.htm
Air ring gages are used in bearing manufacturing to test for size as well as concentricity. The beauty of these gages is you do not have to have a perfect sample to set them up, just know what the measurement of the control piece is to calibrate the gage. The indicator then shows variation from the item used to set it and the piece being measured, so if too much variation, reject it.
RE: Go No-Go Guage for Ring
Mike Halloran
Pembroke Pines, FL, USA