In this paper, a methodology is described aiming at assessing the variability causes, affecting the measurement instruments typically used in the automotive sector for the analysis of dimensional defects of coupled components, to check the conformity of the width of the gap between two adjacent parts and the profile, i.e. the alignment of the two surfaces. The inspection may be performed by means of different gap/flush tools, such as feeler gages, calipers and Laser scanner devices; depending on the choice, a different measurand has to be considered. The obtained measurements need to be consistent, because these devices are used indistinctly, depending on the severity of the control and on the typology of the control itself. The paper proposes a methodology to verify the metrological conformity of measurements provided by both traditional and laser-based instruments, so that it is possible to interpret them in an interchanging manner. A 3D geometric model is realized, used as a basis for the analysis of the most influencing uncertainty causes and measurement biases. The methodology will demonstrate to be able to identify and evaluate in a parametric way, the typical variability causes of the instruments considered. It will also highlight possible improvements in the integration of the obtained results.

Measurement uncertainty estimation of gap and profile in the automotive sector / D'Emilia, G.; Gaspari, A.; Iavicoli, C.; Natale, E.. - In: JOURNAL OF PHYSICS. CONFERENCE SERIES. - ISSN 1742-6588. - 1589:1(2020), p. 012017. (Intervento presentato al convegno 27th A.I.VE.LA. Annual National Meeting tenutosi a Istituto Motori - CNR, ita nel 2019) [10.1088/1742-6596/1589/1/012017].

Measurement uncertainty estimation of gap and profile in the automotive sector

Gaspari A.;
2020-01-01

Abstract

In this paper, a methodology is described aiming at assessing the variability causes, affecting the measurement instruments typically used in the automotive sector for the analysis of dimensional defects of coupled components, to check the conformity of the width of the gap between two adjacent parts and the profile, i.e. the alignment of the two surfaces. The inspection may be performed by means of different gap/flush tools, such as feeler gages, calipers and Laser scanner devices; depending on the choice, a different measurand has to be considered. The obtained measurements need to be consistent, because these devices are used indistinctly, depending on the severity of the control and on the typology of the control itself. The paper proposes a methodology to verify the metrological conformity of measurements provided by both traditional and laser-based instruments, so that it is possible to interpret them in an interchanging manner. A 3D geometric model is realized, used as a basis for the analysis of the most influencing uncertainty causes and measurement biases. The methodology will demonstrate to be able to identify and evaluate in a parametric way, the typical variability causes of the instruments considered. It will also highlight possible improvements in the integration of the obtained results.
2020
27th A.I.VE.LA. Annual National Meeting
Measurement uncertainty estimation of gap and profile in the automotive sector / D'Emilia, G.; Gaspari, A.; Iavicoli, C.; Natale, E.. - In: JOURNAL OF PHYSICS. CONFERENCE SERIES. - ISSN 1742-6588. - 1589:1(2020), p. 012017. (Intervento presentato al convegno 27th A.I.VE.LA. Annual National Meeting tenutosi a Istituto Motori - CNR, ita nel 2019) [10.1088/1742-6596/1589/1/012017].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11589/239173
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