Our business is applying coatings to components of many shapes and sizes. It is typically possible to either draft the nominal shape of the component as a solid model or to build a representation of the piece prior to coating from CMM data. My interest is in measuring applied coating thickness after deposition by taking hits on the modified surface and determining the distance of the hit point away from the original surface. I cannot seem to find a constructed geometry that will fit this need. Does such a tool exist in PC DMIS? In the example below, we measured the conical surface CON1 prior to coating, using CYL1 and PLN1 for alignment. Coating was applied to the interior surface of the cone at PNT1 and PNT2. I'd like to know how far away (in a direction normal to the surface below) PNT 1 and PNT2 are from CON1.
A CMM is not always the right tool. I've worked with painting shops that do AS9100 level work so they're accredited to their own sort of QMS like NADCAP or something..Anyway, these guys had a gun with a laser & they just had to shoot it at the painted material and it would tell you +/- a few microns how thick the coating was.
If you need to use a CMM then I stand by my original advise.. Establish an origin on your non-coated surface & take as many hits as you can. Once aligned take vector points on your coated surface(s) & report T values of those points.
The only other way I can think of to measure this would be to section the part and measure the coating thickness with some sort of vision system like an OGP or optic-mic
A CMM is not always the right tool. I've worked with painting shops that do AS9100 level work so they're accredited to their own sort of QMS like NADCAP or something..Anyway, these guys had a gun with a laser & they just had to shoot it at the painted material and it would tell you +/- a few microns how thick the coating was.
If you need to use a CMM then I stand by my original advise.. Establish an origin on your non-coated surface & take as many hits as you can. Once aligned take vector points on your coated surface(s) & report T values of those points.
The only other way I can think of to measure this would be to section the part and measure the coating thickness with some sort of vision system like an OGP or optic-mic
