Wyniki wyszukiwania - Biblioteka Nauki

1

Zastosowanie analizy MSA do oceny przyrządów do pomiaru struktury geometrycznej powierzchni

100%

Adamczak S. , Świderski J. , Dobrowolski T. , Durakbasa N.

Mechanik

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2018

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tom R. 91, nr 5-6

434--436

PL

Przedstawiono zastosowanie elementów analizy MSA (measurement system analysis) do oceny przyrządów do pomiaru struktury geometrycznej powierzchni, wykorzystujących metody stykowe i optyczne. Skupiono się na procedurze odchyleń eksperymentalnych (bias).

EN

Presented is the application of MSA elements (measurement system analysis) for the assessment of measuring instruments that use contact and optical methods to measure surface texture. The main field of the study was the procedure of experimental deviations (bias).

2

Opis empiryczny wpływu czasu ekspozycji w warunkach zużycia ściernego na strukturę geometryczną powierzchni materiału kompozytowego typu FeAl-AL2O3

100%

Patejuk A. , Poniatowska M. , Czech M.

Aparatura Badawcza i Dydaktyczna

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2008

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tom T. 13, nr 1

6-16

PL

W artykule przedstawiono wyniki badań wpływu czasu trwania procesu zużycia ściernego materiału kompozytowego typu FeAl-Al2O3 na strukturę geometryczną powierzchni tworzących pary tribologiczne. Przeprowadzone badania udowodniły, że korzystając z analizy struktury geometrycznej powierzchni, np. z wykorzystaniem skomputeryzowanego stanowiska badawczego w skład którego wchodzi, m.in.: przyrząd HOMMEL TESTER T1000 oraz komputer klasy PC z zainstalowanym oprogramowaniem Turbo Chropowatość dla Windows, można bardzo precyzyjnie badać strukturę geometryczną materiału kompozytowego na osnowie faz międzymetalicznych zbrojonych cząstkami o zadanym udziale. Zamieszczone w artykule wykresy pokazują, że wartość "plateau" stanu struktury geometrycznej konstytuuje się po około 8 godzinach ekspozycji niezależnie od udziału składników fazowych w materiale kompozytowym. Natomiast poziom odcinka "plateau" jest zdeterminowany w pierwszym rzędzie udziałem składników fazowych, tworzących materiał kompozytowy. Przeprowadzone badania pozwoliły na wyprowadzenie końcowych zależności empirycznych, charakteryzujących właściwości struktury geometrycznej w funkcji czasu ekspozycji dla materiałów kompozytowych na osnowie FeAl zbrojonych cząstkami w ilości 10 i 20% (obj.).

EN

The researches into results of the influence of abrasive wear time on composite material type FeAl-Al2O3 mating surfaces texture has been shown in this paper. The researches proved full usefulness of the computer measuring system with HOMMEL TESTER T1000 unit and Turbo Rougness for Windows program to precision analysis of surface texture of composite materials strengthen by intermetalics reinforced with AI2O3 particles. Included diagrams show that the value of "plateau" state of the surface texture constitutes after about 8 hours of an exposition independently on the intermetalic phase compounds volume fraction in composite material. On the other hand the level of the "plateau" segment is determined mainly by the phase compounds volume fraction in this composite material. The researches into results allow to derive an empirical formula characterizing geometrical texture properties versus an exposition time for composite materials strengthen by FeAl reinforced with particles 10 i 20% (by volume).

3

Analysis of fruit and vegetable surface color

100%

Baranyai L. , Szepes A.

Machine Graphics and Vision

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2002

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tom Vol. 11, No. 2/3

351-361

EN

Changes of color on the surfaces of tomatoes, mushrooms and apples were measured with digital omage processing techniques. Texture analysis methods were applied to identify the stage of ripeness and defects, such as mechanical injuries and microbiological infection. Distributions of red, green, blue color components and intensity values were shown by hisograms. Differences in intensities - in the directions of 0°, 45°, 90°, and 135° - were also collected. First - order statistical parameters and coordinates of polar quality points for sum and defference histogarms were calculated and evaluated. Classification powers of different color signals were compared.

4

Influence of grinding conditions on the topographic characteristic of machined surfaces

100%

Żak K.

Journal of Machine Engineering

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2014

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tom Vol. 14, No. 2

47--56

EN

This paper compares the ability of grinding processes to enhance functional properties of the surface textures produced. The main objective of such a comparison is to facilitate the decision about precision grinding operations. The experimental study performed includes two grinding operations using electro-corundum Al2O3 and CBN wheels. For this purpose, the topographic features of ground surfaces with the Sa roughness parameter of about 0.2?m were compared. Apart from the set of 3D roughness parameters, the frequency, fractal, wavelet and motif characteristics were analyzed.

5

Comparison of results of surface texture measurement obtained with stylus methods and optical methods

100%

Pawlus P. , Reizer R. , Wieczorowski M.

Metrology and Measurement Systems

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2018

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tom Vol. 25, nr 3

589--602

EN

The results of surface texture measurements obtained with the stylus equipment, white light interferometer and confocal profilometer of the same samples were compared. Machined isotropic and anisotropic surfaces, of symmetric and asymmetric ordinate distribution were measured. Forms were removed using polynomials. Sampling intervals and measuring areas during computations of parameters were the same. Discrepancies between the results obtained with various methods were observed and discussed. It was found that errors of surface texture measurement with the optical methods depend on the type of surface topography.

6

Influence of surface textures produced by finishing operations on their functional properties

100%

Grzesik W.

Journal of Machine Engineering

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2016

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tom Vol. 16, No. 1

15--23

EN

This literature survey highlights the possible influences of surface roughness parameters on functional properties of surfaces produced by different finishing operations. The prediction of such functional properties as fatigue, sealing capacity, adhesion, friction, wear and corrosion resistance based on five groups of spatial (S) roughness parameters is overviewed. In contrast, traditional approach based on 2D roughness parameters is provided. Some real 3D surface topographies produced with desired functional properties by finishing cutting and abrasive operations are characterized. This survey confirms the vital role of machined surfaces in the functionality of machine components.

7

Assessment of the texture and topographic features of a surface produced by the 3D printing process

100%

Musiał W. , Haracewiat J. , Kozłowicz K.

Advanced Technologies in Mechanics

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2015

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tom Vol. 2, no. 3 (4)

35--45

EN

Presented in the paper is a study of the surface texture as produced by the Up3D printer from Solveere with the printing parameters varying in relation to those of the surface under survey. Used for the measurements was optical profilometer Nanovea PS50 operating to the chromatic aberration principle. The results were used for estimation of the 3D printer output data and also for consideration whether some parts or items as released by 3D printers were practicable for use in a production process.

8

Struktura geometryczna powierzchni kompozytów odlewniczych typu FeAl-Al2O3 po próbach tarcia

100%

Patejuk A. , Poniatowska M.

Archiwum Odlewnictwa

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2006

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tom R. 6, nr 18/1

381--386

PL

Artykuł dotyczy badania struktury geometrycznej powierzchni materiałów kompozytowych na osnowie faz międzymetalicznych FeAl-Al2O3 z różnym udziałem fazy zbrojącej, z obecnością i bez powłoki niklowej, otrzymywanych metodą odlewania.

EN

The paper deals with investigations of surface texture of composite materials type FeAl-Al2O3 with various volume fraction of reinforce material and nickel covering.

9

An assessment of applicability of the two-dimensional wavelet transform to assess the minimum chip thickness determination accuracy

100%

Gogolewski D. , Makieła W. , Nowakowski Ł.

Metrology and Measurement Systems

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2020

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tom Vol. 27, nr 4

659--672

EN

The objective of the study was to assess the potential use of optical measuring instruments to determine the minimum chip thickness in face milling. Images of scanned surfaces were analyzed using mother wavelets. Filtration of optical signals helped identify the characteristic zones observed on the workpiece surface at the beginning of the cutting process. The measurement data were analyzed statistically. The results were then used to estimate how accurate each measuring system was to determine the minimum uncut chip thickness. Also, experimental verification was carried out for each mother wavelet to assess their suitability for analyzing surface images.

10

SURFACE TEXTURE ANALYSIS AFTER BALL END MILLING WITH VARIOUS SURFACE INCLINATION OF HARDENED STEEL

100%

Wieczorowski M. , Wojciechowski S. , Twardowski P.

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nr 1

11

Wielomodalne podejście do opisu struktury geometrycznej powierzchni

100%

Graboń W.

Zeszyty Naukowe Politechniki Rzeszowskiej. Mechanika

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2018

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tom z. 90 [298], nr 1

29--46

PL

W artykule przedstawiono nowe wielomodalne podejście do opisu struktury geometrycznej powierzchni. Dokonano analizy istniejących w tym zakresie rozwiązań, zwracając szczególną uwagę na zalety i wady każdego z nich. Przedstawiono także przykłady wykorzystania nowego modelu do analizy powierzchni modelowanych komputerowo. Przykłady te dowodzą, że model sprawdza się dla powierzchni zawierających tekstury składowe zarówno o okresowym, jak i losowym charakterze rozkładu rzędnych. Naznaczono kierunki dalszych badań i możliwości wykorzystania wprowadzonego modelu.

EN

This paper presents a new multi-modal approach to the description of the surface texture. An analysis of the existing in these scope solutions was done, paying special attention to the advantages and disadvantages of each of them. The examples of the use of a new model for the analysis of computer-modelled surface texture were presented. These examples prove that the model works well for surfaces containing textures with periodic and random nature of the distribution of ordinates. The directions of further research and the possibilities of using the introduced model were specified.

12

Gloss inspection of metallic products by diffractive optical element based sensor

100%

Myller K. , Silvennoinen R. , Peiponen K.

Opto-Electronics Review

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2003

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tom Vol. 11, No. 1

35-38

EN

A sensoe was developed to measure the glos of curved metal objects. The crucial part of the sensor is a diffractive optical element (DOE). The advantages of the present sensor are non-contact measurement mode, normal incidence of the probe light, and possibility to measure gloss of curved surfaces. The sensory yields information also on the surface texture, such as finishing marks, of curved metal surfaces. The operation of the sensor was verified by measuring draw-off pipes of water cranes, which were obtained from metal industry.

13

Surface texture analysis after ball end milling with various surface inclination of hardened steel

100%

Wojciechowski S. , Twardowski P. , Wieczorowski M.

Metrology and Measurement Systems

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2014

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tom Vol. 21, nr 1

145--156

EN

In this paper, an analysis of various factors affecting machined surface texture is presented. The investigation was focused on ball end mill inclination against the work piece (defined by surface inclination angle α. Surface roughness was investigated in a 3D array, and measurements were conducted parallel to the feed motion direction. The analysis of machined surface irregularities as a function of frequency (wavelength λ), on the basis of the Power Density Spectrum - PDS was also carried out. This kind of analysis is aimed at valuation of primary factors influencing surface roughness generation as well as its randomness. Subsequently, a surface roughness model including cutter displacements was developed. It was found that plain cutting with ball end mill (surface inclination angle α = 0°) is unfavorable from the point of view of surface roughness, because in cutter’s axis the cutting speed νc ≈ 0 m/min. This means that a cutting process does not occur, whereas on the machined surface some characteristics marks can be found. These marks do not appear in case of α ≠ 0°, because the cutting speed νc ≠ 0 on the full length of the active cutting edge and as a result, the machined surface texture is more homogenous. Surface roughness parameters determined on the basis of the model including cutter displacements are closer to experimental data for cases with inclination angles α ≠ 0°, in comparison with those determined for plain cutting (α = 0°). It is probably caused by higher contribution in surface irregularities generation of plastic and elastic deformations cumulated near the cutter’s free end than kinematic and geometric parameters, as well as cutter displacements.

14

Wpływ zastosowania osłony termicznej profilometru stykowego na wyniki pomiarów stereometrii powierzchni

100%

Adamczak S. , Świderski J. , Dobrowolski T.

Mechanik

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2018

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tom R. 91, nr 2

126--128

PL

Przedstawiono wpływ zmiany temperatury w czasie na wyniki pomiarów stereometrii powierzchni oraz skuteczność zastosowania osłony profilometru stykowego w celu zmniejszenia wahań temperatury oddziałującej na przyrząd pomiarowy, co decyduje o pojawieniu się składowej falistości w osi Y.

EN

The article presents an impact of the temperature change in time on measurement results of the surface texture and efficiency of the application of the protective chamber of the contact profilometer in order to minimize variations of the temperature affecting measuring instrument.

15

Areal field and fractal based characterization of hard surfaces produced by different machining operations

88%

Zak K.

Journal of Machine Engineering

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2016

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tom Vol. 16, No. 1

24--32

EN

This literature survey highlights the possible influences of surface roughness parameters on functional properties of surfaces produced by different finishing operations. The prediction of such functional properties as fatigue, sealing capacity, adhesion, friction, wear and corrosion resistance based on five groups of spatial (S) roughness parameters is overviewed. In contrast, traditional approach based on 2D roughness parameters is provided. Some real 3D surface topographies produced with desired functional properties by finishing cutting and abrasive operations are characterized. This survey confirms the vital role of machined surfaces in the functionality of machine components.

16

Determining the energy validity of the Kostetsky's hypothesis on the basis of models for relative motion velocity v = 0.08 m/sec

88%

Mikołajczyk J. R.

Developments in Mechanical Engineering

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2020

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tom nr 16(8)

17--29

EN

The paper examines the dependence of the temperature of friction node of conformal contact on the amount of electric power consumption. It presents arguments confirming the validity of Kostetsky's energy hypothesis. R software was applied to the above-mentioned analysis.

17

Narzędzia do analizy porównawczej stanu struktury geometrycznej powierzchni ukształtowanej toczeniem

88%

Adamczak S. , Świderski J.

Mechanik

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2017

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tom R. 90, nr 10

906--908

PL

Przedstawiono możliwości oceny stanu struktury geometrycznej powierzchni ukształtowanej za pomocą toczenia z wykorzystaniem poszczególnych grup parametrów oraz wybranych funkcji SGP. Analizie poddano powierzchnie uzyskane z zastosowaniem różnych wartości posuwu.

EN

The paper presents methods of evaluating the surface texture machined by turning using individual groups of parameters and selected SGP functions. Surface parameters obtained using different feed rates were analyzed.

18

An assessment of applicability of the two-dimensional wavelet transform to assess the minimum chip thickness determination accuracy

88%

Gogolewski D. , Makieła W. , Nowakowski Ł. , Gogolewski D. , Makieła W. , Nowakowski Ł.

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19

Porous surface silicon layers in silicon solar cells

88%

Panek P. , Dutkiewicz J. , Levy-Clement C. , Lipiński M. , Bielańska E. , Wodnicka K.

Archives of Metallurgy and Materials

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2005

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tom Vol. 50, iss. 2

417-421

EN

The porous silicon (PSi) layers have been studied in the aspect of their application in the multicrystalline silicon (mc-Si) solar cells. The macroporous layers were prepared by double-step chemical etching prior to the donor diffusion. They have been investigated using scanning (SEM) and transmission (TEM) electron microscopy to reveal the morphology of PSi layers. The techniques of spectral response and current-voltage characteristics have been used to determine the opto-electrical parameters of the solar cells. The porosity was measured by the mercury porosimetry and nitrogen sorption method. The porous layers reported here have had a sponge-like homogeneous structure over the whole 25 cm2 surface of each sample and the decreased effective reflectance (Reff) below 10%. As a final result the mc-Si solar cells with PSi layer were obtained with the conversion effciency (Eff) over 13%.

PL

W pracy przedstawiono metodę uzyskania redukcji odbicia fektywnego ( Eeff) poniżej 10% od powierzchni krzemu multikrystalicznego ( mc-Si ) dla promieniowania w zakresie 400÷1100 nm długości fali. Metoda polega na chemicznym trawieniu powierzchni mc-Si w roztworach na bazie HNO3:HF i wytworzeniu powierzchniowej tekstury geometrycznej w formie porów o średnicy od 30÷800 nm i porownywalnej głębokości. Krzem multikrystaliczny z warstwami krzemu porowatego wykorzystano do wytworzenia ogniw słonecznych. W zależnosci od wielkości porów otrzymano ogniwa o sprawności konwersji fotowoltaicznej od 9.8% do 13.0%.

20

Comparisons of envelope morphological filtering methods and various regular algorithms for surface texture analysis

88%

Podulka P.

Metrology and Measurement Systems

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2020

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tom Vol. 27, nr 2

243--263

EN

In this paper both envelope approach and morphological filters for characterisation of surface textures were proposed, applied and thoroughly examined. Obtained results were compared with those received after appliance of commonly-used algorithms. The effect of appliance of proposed procedures on surface topography parameters (from ISO 25178 standard) was taken into consideration. The following types of surface textures were assessed: two-process plateau-honed cylinder liners, plateau-honed cylinder liners with additionally burnished dimples, turned piston skirts, grinded and/or isotropic topographies. It was assumed that envelope characteristics (envelope filtration) can provide results useful for assessments of deep and/or wide oil-reservoirs especially when they are edge located. Moreover, some near-valley areas of surface texture details can be less distorted when envelope filtering is accomplished. It was also found that closing and/or opening envelope filtration can be valuable for reduction of some surface topography measurement errors.