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The effect of valley depth on areal form removal in surface topography measurements

Podulka P.

Bulletin of the Polish Academy of Sciences. Technical Sciences

2019

Vol. 67, nr 2

391--400

Surface topography assessments with valley exploration are of great importance. Two-process surfaces are often proposed for many combustion engines. One of the errors committed in surface topography measurements and analysis are those that occur during data processing. In this paper, improper areal form removal was taken into consideration for plateau-honed cylindrical surfaces with additionally burnished oil pockets. Usually, the reference plane is established by application of: fitting algorithms (e.g. cylindrical shape), polynomials, filters and other procedures. In many cases, the influence of the reference plane was not fully recognized during valley depth consideration. Moreover, the influence of areal form removal with edge-to-dimple and valley‑to-dimple distances was not precisely defined. In this research, commonly used algorithms for form separation in surface topography analysis were proposed for the applications being considered. The digital filter bandwidth was also specified for valley depth analysis. The distortion of edge‑located oil pockets was specified. It was assumed that application of robust techniques does not necessarily provide the desired results.

Błędy pomiaru profili powierzchni zawierających kieszenie smarowe

Graboń W., Pawlus P., Gałda L., Dzierwa A.

Archiwum Technologii Maszyn i Automatyzacji

2010

Vol. 30, nr 4

87-92

Celem badań było określenie wpływu wybranych źródeł błędu na dokładność pomiaru parametrów profili struktury geometrycznej powierzchni zawierających kieszenie smarowe, ukształtowane metodą wygniatania. Analizowano wpływ wzrostu odcinka próbkowania, promienia końcówki pomiarowej, błędu kwantyzacji i filtracji cyfrowej na wyniki pomiaru parametrów profili nierówności.

The analysis of increase of sampling interval, probe radius, quantization errors and digital filtration on parameters of profiles with oil pockets was done.