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Measuring Rubber O-ring ID & Thickness Ideas

MattR
Hey guys,
Once in a while we have to inspect the ID & thickness of round rubber o-ring seals. Right now I check both using a vertical & horizontal comparators. What can be done to automate this slow process? We have tactile CMMs all right but that's it. Does Hexagon have anything in its inventory that can automate this or we need to look elsewhere? What do you think?
Thanks.
Parents
  • If you only need go/ no go results for the thickness, then a gage might work. Two flat plates set the proper distance apart. Make sure the instructions say that the part must drop freely thru the slot; i.e. no poking it thru.
    There are optical comparators available with edge detection and DCC drives. They are also programmable so that you could create a fixture, load up a bunch of parts and let it run. Cost does get close to the price of a low end vision system.
Reply
  • If you only need go/ no go results for the thickness, then a gage might work. Two flat plates set the proper distance apart. Make sure the instructions say that the part must drop freely thru the slot; i.e. no poking it thru.
    There are optical comparators available with edge detection and DCC drives. They are also programmable so that you could create a fixture, load up a bunch of parts and let it run. Cost does get close to the price of a low end vision system.
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  • in reply to kingsld1
    Yep. Problem is I need to give eng actual numbers that is why I'm looking at the VMM so that way I can give them numerical results. My question is do I need a laser beam to scan across the o-ring to get the thickness or white light sensor alone would do? Problem is those o-rings are almost all black. Can the white light find the highest point of what essentially is a tube & can it find it if the o-ring is dark?
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