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Wyświetlanie 1-4 z 4
Tytuł:
The effect of reference plane on values of areal surface topography parameters from cylindrical elements
Autorzy:
Podulka, P.
Dobrzański, P.
Pawlus, P.
Lenart, A.
Powiązania:
https://bibliotekanauki.pl/articles/221539.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
surface topography
reference element
cylinder liners
oil pockets
piston skirts
Opis:
In this paper distortion of surface topography measurement results by improper selection of the reference plane is taken into consideration. The following types of surfaces from cylindrical elements were analyzed: cylinder liners after plateau honing, cylinder liners with additionally burnished oil pockets and turned piston skirts. Surface topographies of these elements after a low wear process were also studied. In order to obtain areal surface topography parameters, the form was eliminated using cylinders and polynomials of the following degrees: 2, 3, 4, 6, 8, 10 and 12. Parameters of surfaces after form removal were compared. After analysis of results the reference elements for each kind of surface were recommended. A special procedure was proposed in order to select the degree of a polynomial. This method is based on surface topography changes with increase of polynomial degree. The effect of improper form elimination on measuring uncertainty was studied.
Źródło:
Metrology and Measurement Systems; 2014, 21, 2; 247-256
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The Effect of Valley Location in Two-Process Surface Topography Analysis
Autorzy:
Podulka, Przemysław
Powiązania:
https://bibliotekanauki.pl/articles/101955.pdf
Data publikacji:
2018
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
surface topography
dimples
cylinder liners
measurement
measurement errors
topografia powierzchni
dołki
tuleje cylindrowe
pomiary
błędy pomiaru
Opis:
In this paper the influence of oil pockets location on extraction of surface topography features was taken into account. Plateau-honed cylinder liners with additionally added dimples were taken in consideration. The effect of dimples location on the application of various procedures (cylinder fitting procedure, polynomial approximation) for areal form removal was taken into account. It was noticed that application of 3rd (or greater) degree of the polynomials can caused false estimation of reference plane; extraction of surface topography features by polynomial approximation cannot provide good results when the distance between dimples is too small. For two-process surfaces (plateau-honed cylindrical elements containing wide and deep valleys) the digital filtering was proposed. Application of robust techniques (robust Gaussian regression filter) allowed for areal form removal improvement. However, some of the wide dimples were distorted when the dimple-to-edge distance was too small (smaller than filter bandwidth value).
Źródło:
Advances in Science and Technology. Research Journal; 2018, 12, 4; 97-102
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Selection of reference plane by the least square fitting methods
Autorzy:
Podulka, P.
Powiązania:
https://bibliotekanauki.pl/articles/102979.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
surface topography
reference plane
least-square fitting
cylinder fitting
polynomial approximation
oil pockets
cylinder liners
piston skirts
Opis:
There are many disadvantages affecting the accuracy of surface topography measurement and analysis. One of them are the errors obtained during data processing. Usually surface topographies of car engine parts are studied after form removal. Many algorithms and procedures were developed and suggested. However, the selection of reference plane with accordance to surface topography measurements of cylindrical elements was not fully recognized. In this paper least square fitting methods (cylinder, polynomial) and commercial filters (Gaussian filter, Gaussian regression filter and robust Gaussian regression filter) for areal form removal were compared and proposed. Three types of surfaces: cylinder liners after plateau-honing, plateau-honed cylinder liners with oil pockets created by burnishing techniques and turned piston skirts were analyzed. Distortion of surface topography parameters (from ISO 25178 standard) according to improper selection of reference plane was also taken into consideration. It was assumed that least square fitted cylinder plane gave better results for both of type cylinder liners according to commonly used algorithm. However, for piston skirt surfaces the obtained results were very similar. For least square polynomial fittings it was found that applied method for cylinder liners gave usually better robustness for scratches, valleys and dimples occurrence. For piston skirt surfaces better edge-filtering results were obtained. It was also recommended to analyse the Sk parameters for proper selection of reference plane in surface topography measurements.
Źródło:
Advances in Science and Technology. Research Journal; 2016, 10, 30; 164-175
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ pojedynczych wierzchołków struktury geometrycznej powierzchni na usuwanie zarysu kształtu metodą aproksymacji wielomianowej
Spikes influence on polynomial form removal in surface topography
Autorzy:
PODULKA, Przemysław
Powiązania:
https://bibliotekanauki.pl/articles/456470.pdf
Data publikacji:
2014
Wydawca:
Uniwersytet Rzeszowski
Tematy:
struktura geometryczna powierzchni
cylindry silników spalinowych
pojedyncze wierzchołki
aproksymacja wielomianowa
surface topography
cylinder liners
spikes
polynomial form removal
Opis:
Artykuł zawiera opis wpływu pojedynczych wierzchołków struktury geometrycznej powierzchni na usuwanie zarysu kształtu za pomocą metody aproksymacji wielomianowej. W pracy badano powierzchnie cylindrów silników spalinowych po gładzeniu płasko-wierzchołkowym oraz po wygniataniu kieszeni olejowych. Określono take wpływ szpilek na parametry stereometrii powierzchni podczas eliminacji odchyłki kształtu.
In the article the influence of spikes on the surface topography areal form removal by polynomial approximation was presented. The cylinder liners after plateau-honing and plateau-honing with additionally added oil pockets were studied. The impact of spikes on the surface topography parameters (from ISO-25178 standard) while form removal was also described
Źródło:
Edukacja-Technika-Informatyka; 2014, 5, 1; 654-661
2080-9069
Pojawia się w:
Edukacja-Technika-Informatyka
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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