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    Wyświetlanie 1-5 z 5
    Tytuł:
    Applicability of selected groups of roughness parameters for description of surface layer of flat-top “plateau” structures
    Autorzy:
    Kowalski, M.
    Wiśniewska, M.
    Karolczak, P.
    Stancekova, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/957943.pdf
    Data publikacji:
    2016
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    roughness parameters
    flat-top “plateau” surface
    honing
    Opis:
    The aim of this study is to determine the usefulness of selected 2D roughness parameters for detecting changes of geometric features and the rate the quality of the surface generated in the process of honing combustion engines sleeves. The paper presents the importance of mathematical modeling of virtual surface topography with different participation of determined and random factor. The possibilities of modeling the flat-top “plateau” surface roughness characteristic for honed surface was showed. Suitability of application of the roughness parameter for description of the selected variable characteristics of roughness profiles were determined using the correlation coefficient and the additional evaluation index designated as t. Indicator t was used for comparing the percentage change of the tested value of modeled profile characteristics with changes selected for evaluation of the roughness parameters 2D.
    Źródło:
    Advances in Science and Technology. Research Journal; 2016, 10, 32; 32-39
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Diagnostics of workpiece surface condition based on cutting tool vibrations during machining
    Autorzy:
    Józwik, J.
    Mika, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/102959.pdf
    Data publikacji:
    2015
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    vibration
    diagnostics
    machining
    turning
    surface geometric structure
    roughness parameters
    Opis:
    The paper presents functional relationships between surface geometry parameters, feedrate and vibrations level in the radial direction of the workpiece. Time characteristics of the acceleration of cutting tool vibration registered during C45 steel and stainless steel machining for separate axes (X, Y, Z) were presented as a function of feedrate f. During the tests surface geometric accuracy assessment was performed and 3D surface roughness parameters were determined. The Sz parameter was selected for the analysis, which was then collated with RMS vibration acceleration and feedrate f. The Sz parameter indirectly provides information on peak to valley height and is characterised by high generalising potential i.e. it is highly correlated to other surface and volume parameters of surface roughness. Test results presented in this paper may constitute a valuable source of information considering the influence of vibrations on geometric accuracy of elements for engineers designing technological processes.
    Źródło:
    Advances in Science and Technology. Research Journal; 2015, 9, 26; 57-65
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Differences in Roughness Parameter Values from Skid and Skidless Contact Stylus Profilometers
    Autorzy:
    Grochalski, Karol
    Mendak, Michał
    Jakubowicz, Michał
    Gapiński, Bartosz
    Swojak, Natalia
    Wieczorowski, Michał
    Krawczyk, Aleksandra
    Powiązania:
    https://bibliotekanauki.pl/articles/2024198.pdf
    Data publikacji:
    2021
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    contact profilometer
    portable profilometer
    roughness parameters
    skid devices
    skidless devices
    profilometr kontaktowy
    profilometr przenośny
    parametry chropowatości
    urządzenia poślizgowe
    urządzenia bezpoślizgowe
    Opis:
    Contact stylus profilometry is the leading surface texture measuring method in many manufacturing industries. For years it has been unmatched in terms of accuracy and reliability. Advancements in technology have led to the improvements in the profilometer design. A stylus can either have a built in skid or be skidless. In this study, the influence of skid on the measurement accuracy and repeatability was evaluated. Four different contact stylus profilometers were used to measure three standard roughness artifacts each. Every set of measurements consisted of 50 repetitions of the same profile, with the same parameters. Out of these profiles, five roughness parameters were calculated and were subjected to a statistical analysis. Relative errors of these parameters were also considered and presented individually for each roughness standard. Researchers found differences in the measurement results dispersion of various roughness parameters between the three roughness standards. The presented results of the measurements clearly indicated that there is a dispersion of the obtained values for the older type of contact stylus profilometer (P1, skid). The skidless portable devices, P2 and P3, have better measurement resolution, which results in a noticeably lower dispersion of measured values. A tabletop, stationary device utilizes a skidless measuring probe. It has both the best resolution and the highest rigidity, which results in the lowest dispersion of measured values. The lowest relative error of the Ra parameter was determined for the P2 device (9.2%) and the highest was determined for the P3 device (72.6%).
    Źródło:
    Advances in Science and Technology. Research Journal; 2021, 15, 1; 58-70
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The influence of the conditions of emulsion mist formation on the surface roughness of AISI 1045 steel after finish turning
    Autorzy:
    Feldshtein, E.
    Józwik, J.
    Legutko, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/102881.pdf
    Data publikacji:
    2016
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    surface roughness
    turning
    cutting parameters
    emulsion mist
    Opis:
    The processes of machining have vital influence on the operating properties of machine parts because they ensure the formation of the required geometrical structure of the working surfaces and the condition of the top layer. In this paper the influence of emulsion mist parameters on Ra, Rz and RSm surface roughness parameters is described when finishing the turning of C45 carbon steel. It was found that cutting parameters have considerably greater influence on roughness parameters in comparison with emulsion mist conditions. When increasing cutting speed from 100 to 300 m/min Ra and Rz values decrease nearly 2 times, but RSm value does not depend on speed. When increasing feed rate from 0.1 to 0.2 mm/rev Ra, Rz and RSm values increase more than twice. Changes of emulsion mass flow and compressed air flow affect roughness parameters reach 9–15% of maximum. It was shown that Parameter Space Investigation method can be used efficiently for quick analysis of tested parameters and optimization of their values.
    Źródło:
    Advances in Science and Technology. Research Journal; 2016, 10, 30; 144-149
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effects of forming tools and process parameters on surface roughness in incremental sheet forming
    Autorzy:
    Khalil, Umair
    Aziz, Muhammad Haris
    Jahanzaib, Mirza
    Ahmad, Wasim
    Hussain, Salman
    Hafeez, Faisal
    Powiązania:
    https://bibliotekanauki.pl/articles/103319.pdf
    Data publikacji:
    2018
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    ISF
    quantitative survey
    forming tool
    forming parameters
    surface roughness
    badanie ilościowe
    narzędzia do formowania
    chropowatość powierzchni
    Opis:
    Literature has vastly advocated for incremental sheet forming as a significant process for formation of sheet metal components, because of its higher formability in comparison with the rest of metal forming processes such as deep drawing and stamping. Due to high formability of incremental sheet forming it becomes important to investigate the main factors, influencing the quality of forming products. However, less attention has been given to investigate the inconsistencies reflected often in determining the effect of multiple forming parameters and parametric interactions comprising of spindle rotational speed and feed rate, tool size and sheet thickness, sheet thickness and step depth. This study investigates the effect of various principal factors including tool type, tool size, sheet thickness, spindle speed, feed rate, step increment including and their respective interaction on surface roughness. Research data was collected by undertaking extensive literature review of previous studies on incremental sheet forming regarding surface quality. A quantitative one way analysis of variance (ANOVA) was employed to analyze the significance and contribution of factors influencing surface quality of sheet forming. The findings highlight the contribution of forming parameters and their combined interactions on surface roughness. Based on the empirical findings, this study derives implications for the optimization of tool type, parametric interactions among principal factors and their respective optimized operational range for incremental sheet forming.
    Źródło:
    Advances in Science and Technology. Research Journal; 2018, 12, 3; 75-95
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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