ESTONIAN ACADEMY
PUBLISHERS
eesti teaduste
akadeemia kirjastus
cover
Estonian Journal of Engineering

On the uncertainty of measurements by measuring the form of a surface; 84–93

Full article in PDF format

Authors
Indrek Abiline, Rein Laaneots, Maidu Nanits, Jürgen Riim

Abstract
Modern manufacturing poses high demands on the accuracy of surfaces of parts of machineryof complicated form. Whether the produced parts of machinery meet the demands, listed in technical specifications, can only be determined in the course of corresponding measurements. One of the possibilities of measuring the surface contour of the parts of complicated form is by using the inductive surface roughness and form measurement instrument “Perthometer Concept”. Although this measuring instrument has been previously calibrated, an investigation was carried out to assess the reliability of the measurement results. A measurement model was composed and the values of the input quantities as well as their distribution were experimentally determined. As a result of this investigation, the reliability of the surface measurement results are characterized basing on expanded uncertainty.
References

  1. Guide to the Expression of Uncertainty in Measurement (first edition 1993, corrected and reprinted 1995). International Organization for Standardization, Geneva, 1995.

  2. Laaneots, R. and Mathiesen, O. An Introduction to Metrology. TUT Press, Tallinn, 2006.

  3. Torims, T. Research on Machining of Diesel Engine Crankshaft Journals Surfaces. Riga Technical University, Riga, 2005.

  4. Rudzitis, J., Torims, T., Konrads, G. and Shperbergs, J. Three-dimensional roughness analyses for air compressor cylinders. In Proc. 5th International Conference of DAAAM Baltic Industrial Engineering. Tallinn, 2006, 163–165.

  5. Rudzitis, J., Shiron, E., Skurba, M. and Torims, T. Classification of rough surfaces. In Scientific Proceedings of Riga Technical University. Series 6. Machine Science and Transport. Production Engineering, vol. 2. RTU, Riga, 2001, 53–57.

  6. Rudzitis, J., Torims, T., Gernish, E. and Konrads, G. Rough surfaces contact examination. In Scientific Proceedings of Riga Technical University. Series 6. Machine Science and Transport. Production Engineering, vol. 14. RTU, Riga, 2004, 19–24.

  7. Hoffmann, K.-P. and Laaneots, R. Pindepaksusetalonide kalibreerimine. EVS Teataja, Tallinn, 1999, No. 7/8, 13–17.

  8. Hasche, K., Hermann, K., Mirande, W., Pohlenz, F. and Seemann, R. Development of scanning force microscopy with subnanometric capability. In Proc. Fourth Seminar on Quantitative Microscopy QM 2000. Semmering, 2000 (PTB-Bericht PTB-F-39), 219–225.

  9. Hoffmann, K.-P., Ahbe, T., Herrmann, K., Hasche, K., Pohlenz, F. and Sun, J. Development and calibration of standards for the coating thickness in the range of micrometer and nanometer. Surface Coating Technol., 2003, 169–170, 732–734.

doi:10.1016/S0257-8972(03)00213-5

10. Perthometer Concept. Operating Instructions. MAHR GmbH, Göttingen. Germany, 2001.


Back to Issue