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ISSN 1805-062X, 1805-0638 (online), ETTN 072-11-00002-09-4
EUROPEAN GRANT PROJECTS | RESULTS | RESEARCH & DEVELOPMENT | SCIENCE
real part, ring gauges with three dimensions were used, referred to in
the article as ‘small’, ‘medium’, and ‘large’ diameters.
The parameters of the gauge at two depths, the roundness of the
gauge at two depths, the diameter of the cylinder, and finally the
cylindricality were evaluated on the individual gauges. The
individual elements were repeatedly scanned with different numbers
of points. Measurements were performed by contact scanning. All
measurements were repeated 5 times. All measurements were
performed clockwise as part of the test.
Subsequently, the data were subjected to mathematical analysis.
This analysis was performed in several consecutive steps. In the first
step, the standard deviations of the measured data were calculated.
These were used to create an initial view of the data obtained. In the
second step, the data were analyzed using the one-factor, or multi-
factor ANOVA method. The outputs then confirmed or refuted the
initial data.
Based on the results, it can be clearly stated that for the evaluation
of the diameter of a circle or cylinder, the optimum number of
points really lies on the border of 30 points. However, it is different
if we focus on the evaluation of cylindricality and circularity. Based
on the results, it is not possible to unambiguously mark the optimum
number of points sufficient for relevant measurements. For the
evaluation of roundness, there was a long-term hope that the
optimum would be found, but in the last test, the standard deviation
flew well above the values obtained throughout the test, see Graph
8. For the evaluation of cylindricality, this hope of finding the
optimum was terminated even earlier, with a value of 500 points
when the standard deviation began to fluctuate significantly. And
therefore the optimum was not found here either.
Therefore, based on the data obtained from both tests in this article
or in article 2, an additional experiment is already planned, which
will focus exclusively on the evaluation of roundness and
cylindricality in contact scanning and combine the findings from
both tests.
Source
1.
STHLE, Lars a Svante WOLD. Analysis of variance
(ANOVA). Chemometrics and Intelligent Laboratory Systems.
1989, 6(4), 259 - 272. DOI: doi.org/10.1016/0169-7439(89)
80095-4.
2.
Kubatova, D[ana] &Melichar, M[artin] (2019). Influence of the
Number of Points on the Evaluated Element when Measuring on
CMM, Proceedings of the 30th DAAAM International
Symposium, pp.0476-0483, B. Katalinic (Ed.), Published by
DAAAM International, ISBN 978-3-902734-22-8, ISSN 1726-
9679, Vienna, Austria DOI: 10.2507/30th.daaam.proceedin
gs.064
3.
Mayer, J. R. R., Mir, Y. A., Trochu, F., Vafaeesefat, A.,
&Balazinski, M. (1997). Touch probe radius compensation for
coordinate measurement using kriging interpolation. Proceeding
softhe Institution of Mechanical Engineers, Part B: Journal of
Engineering Manufacture, 211(1), 11-18. doi:10.1243/095
4405971516031ZEISS [online]. [cit. 2019-03-15].
4.
GHASEMI, Asghar a Saleh ZAHEDIASL. Normality Tests for
Statistical Analysis: A Guide for Non-Statisticians. International
Journal of Endocrinology and Metabolism [online]. 2012, 10(2),
486-489 [cit. 2020-06-05]. DOI: 10.5812/ijem.3505. ISSN
1726-913X. Available: https://sites.kowsarpub.com/ijem/articl
es/71904.html
5.
JIROUŠEK, Pavel. Eligibility of measurement system in the
gearboxes production of Škoda auto a.s [online]. 2012 [cit.
2017-03-08].
6.
PERNIKÁŘ J.: Assessment of the competence of control means
[online]. [cit. 2016-11-25]. Available from: http://gps.fme.vutb
r.cz/STAH_IN FO/31_Pernikar_VUTBR.pdf
7.
Płowucha W., Jakubiec W., Wojtyła M.: Possibilities of CMM
Software to Support Proper Geometrical Product Verification,
Procedia CIRP, Volume 43, 2016, Pages 303-308, ISSN 2212-
8271, http://dx.doi.org/10.1016/j.procir.2016.02.124 .
8.
Barini M. E., Tosello G. Chiffre d L.: Uncertainty analysis of
point-by-point sampling complex surfaces using touch probe
CMMs: DOE for complex surfaces verification with CMM,
Precision Engineering, Volume 34, Issue 1, January 2010, Pages
16-21, ISSN 0141-6359, http://dx.doi.org/10.1016/j.precision
eng.2009.06.009
9.
D. Kubátová, M. Melichar, J. Kutlwašer, Evaluation of
Repeatability and reproducibility of CMM equipment, (2017) In
Procedia Manufacturing, Volume 13, Pages 558-564, ISSN
2351-9789, https://doi.org/10.1016/j.promfg.2017.09.091.
10.
RYAN, P., T., Statistical Methods for Quality Improvement.
(2011) Georgia: Wiley, 657 p. ISBN 978-1-118-05811-4
11.
Bicova, K[aterina] &Bebr, L[ukas] (2018). Analysis and
Dependability of Production Processes for the Automotive
Industry, Proceedings of the 29th DAAAM International
Symposium, pp.0416-0420, B. Katalinic (Ed.), Published by
DAAAM International, ISBN 978-3-902734-20-4, ISSN 1726-
9679, Vienna, Austria DOI: 10.2507/29th.daaam.proceedin
gs.061
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