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Wyszukujesz frazę "Labuda, S" wg kryterium: Autor


Wyświetlanie 1-2 z 2
Tytuł:
Experimental study on the influence of burnish parameters on the surface roughness reduction index
Autorzy:
Polanowski, S.
Labuda, W.
Powiązania:
https://bibliotekanauki.pl/articles/247016.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
burnishing process
surface roughness parameter
stainless steel elements
Opis:
The paper presents the research results of relationship between surface roughness reduction index KRa and three input parameters: burnishing speed Vn, feed fn and burnishing force Fn., and all combinations of levels of yields N measured for 48 points of experiment. The experiment was repeated 3 times. In order to select the model describing the results of tests, the stepping approximation analysis was performed. It relayed at incorporated into the model in following steps approximation elements function, giving the biggest decrease of the sum of squared deviations. The first approximation was based on the ternary monomial of the powers from 0 to 3 for each input value. This approximation aim was to show, that the index of surface roughness reduction does not depend on the burnishing speed in the made in the area of research. The reduced input parameters to two, i.e. fn and Fn. The plan of the experiment was brought to N = 12 and M = 12. The best approximation of test results obtained in the case of Laurent polynomial with stepping selection of elements. The biggest contribution to the decrease in the sum of squared deviations was element −1 ∙ 3 , and then fn 2. The article shows that in the range fn {0.6:1.2} there was not information on the successful model and the lack of influence of f and Fn on the results of the experiment. It is postulated to retry the experiment for the feed f <0.6.
Źródło:
Journal of KONES; 2016, 23, 3; 395-402
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nanoindentation and atomic force microscopy of thin surface layers formed on the shaft surface after burnishing process
Autorzy:
Kuznetsova, T.
Zubar, T.
Chizik, S.
Miszczak, A.
Labuda, W.
Powiązania:
https://bibliotekanauki.pl/articles/242839.pdf
Data publikacji:
2016
Wydawca:
Instytut Techniczny Wojsk Lotniczych
Tematy:
microstructure
atomic force microscopy
nanoindentation
microhardness
Young's modulus
burnishing process
Opis:
The article presents the experimental results of investigation of the pumps shaft surface made of stainless steel after burnishing process. The process of burnishing shafts proposed here aims at increasing the service durability of marine pump shafts of seawater installations, which should give economic benefits in comparison with traditional methods. Burnishing process enables the achievement of high smoothness of machined surface together with the surface layer hardening. This process has been performed in industrial experience on universal machine tools and on CNC machines but it is regarded as plastic tooling. Therefore, the final formation of dimensions and service properties with the use of burnishing constitutes a chipless and dustless treatment, which allows for ranking burnishing among ecological tooling methods. The properties of the surface layers determine the tribological properties of the shaft. The methods of scanning electron microscopy (SEM), atomic force microscopy (AFM) and nanoindentation (NI) were used. The morphology of the changed layers formed by plastic deforming of steel during burnishing treatment was investigated on micro- and nanolevel by SEM and AFM after 1, 2, 3 and 4 passed of burnishing tool. The values of microhardness and Young´s modulus were measured on the shaft cross section from the surface till the 50 – 300 μm depth. The presence of the soft changed layer on the hardened shaft surface after burnishing process determines the decrease of the coefficient of friction during exploitation.
Źródło:
Journal of KONES; 2016, 23, 3; 303-310
1231-4005
2354-0133
Pojawia się w:
Journal of KONES
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-2 z 2

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