Thickness measurement QA for large surface areas (1500x1500)
Thickness measurement QA for large surface areas (1500x1500)
(OP)
Hi All,
I'm looking for a way to check the thickness of large pieces of honeycomb (1500mmx1500mm)
Until now we've been measuring the thickness at various points along the edges and averaging out, however this is not very accurate as it doesn't take any measure of the points within the edges.
Our process is very thickness sensitive and there seems to be a considerable amount of variation coming from our suppliers.
Ideally I would like a method to ensure the majority of the honeycomb piece is NOT LESS than X mm, with a precision of at least 0.05mm
Are there any standard methods of making this kind of dimensional check?
Thanks for your help!
I'm looking for a way to check the thickness of large pieces of honeycomb (1500mmx1500mm)
Until now we've been measuring the thickness at various points along the edges and averaging out, however this is not very accurate as it doesn't take any measure of the points within the edges.
Our process is very thickness sensitive and there seems to be a considerable amount of variation coming from our suppliers.
Ideally I would like a method to ensure the majority of the honeycomb piece is NOT LESS than X mm, with a precision of at least 0.05mm
Are there any standard methods of making this kind of dimensional check?
Thanks for your help!





RE: Thickness measurement QA for large surface areas (1500x1500)
Obvious choices are surface profilometers or laser distance measurement devices.
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers
RE: Thickness measurement QA for large surface areas (1500x1500)
RE: Thickness measurement QA for large surface areas (1500x1500)
Compositepro: We have been taking measurements along the edges with vernier calipers until now.
I imagine it would be difficult to measure over the non-continuous surface of the honeycomb using spring loaded indicators, have you had success in doing so? I should think the indicator tip would fall into each individual honeycomb cell and then catch on the cell sidewalls as it passes over the sheet.
Thanks
RE: Thickness measurement QA for large surface areas (1500x1500)
John H. Dunten, CD
Certified Drafter
RE: Thickness measurement QA for large surface areas (1500x1500)
I might attempt the beam setup with a "large anvil" LVDT, if can find one with the required accuracy, so that I can capture the data for QA.
Thanks All for your input!
Marc
RE: Thickness measurement QA for large surface areas (1500x1500)
http://nanovea.com/wp-content/themes/wp-nanovea/br...
TTFN (ta ta for now)
I can do absolutely anything. I'm an expert! https://www.youtube.com/watch?v=BKorP55Aqvg
FAQ731-376: Eng-Tips.com Forum Policies forum1529: Translation Assistance for Engineers
RE: Thickness measurement QA for large surface areas (1500x1500)
My first thought was basically the same as Compositepro's suggestion. However, depending on the stiffness and flatness of the honeycomb, you may have a gap between it and the table at the measurement location. To avoid including the gap in your local thickness measurement, you could mount another indicator tip-up through a hole in the table and then sum the readings. Display units capable of addition and subtraction are available for electronic gages.
pylfrm