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Wyszukujesz frazę "Țîțu, Aurel Mihail" wg kryterium: Autor


Wyświetlanie 1-3 z 3
Tytuł:
Identification of Data Affected by Aberrant Errors in the Study of the Milling Process on Aluminum Alloys
Autorzy:
Țîțu, Aurel Mihail
Pop, Alina Bianca
Powiązania:
https://bibliotekanauki.pl/articles/27324482.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Czasopisma i Monografie PAN
Tematy:
cutting process
surface roughness
aberrant error
Romanovski test
Opis:
In this scientific paper it is presented the statistical analysis of the experimental data obtained by the study of the influence of the cutting parameters exerted in end-milling process on the surface roughness. The surface roughness parameter is measured in the cutting feed direction and against it. The parameters of the cutting process, the number of levels and their values were established. Based on these parameters, the research was designed on a complete factorial experiment, randomized with seven blocks. The surface roughness values were measured using a roughness tester. The research method used involved the Romanovski test. The aim of this test was to identify the data affected by aberrant errors, to remove them from the samples and then to repeat the tests for the remaining data strings until all values met the conditions imposed by the test.
Źródło:
Archives of Metallurgy and Materials; 2023, 68, 2; 525--530
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Studying the Behavior of the C45 Material when Changing the Tool Geometry Using the Finite Element Method
Autorzy:
Pop, Alina Bianca
Sandu, Andrei Victor
Sachelarie, Adrian
Țîțu, Aurel Mihail
Powiązania:
https://bibliotekanauki.pl/articles/2106591.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
finite element simulation
cutting edge radius
specific pressures
Von Mises stresses
cutting forces
Opis:
Machining with tool that have cutting edge radius provides components with high fatigue strength, microhardness of a large surface layer and plastic deformation. Finite element simulations of the cutting process give a better knowledge of the chip generation phenomenon, heat generation in the machining area, stress and temperature field results. This study emphasizes the true importance of the mathematical model that underlies the shape of the tool in the pre-processing steps of finite element analysis. The argument is that its achievement and definition depend on the network difficulty. This research purpose is to perform simulations series of orthogonal machining with different radius and depth of cut. In this way, conclusions on the impact of these variations on the whole cutting process were drawn. The finite element application used is Deform 2D, the Lagrange incremental method and the Johnson-Cook material model. The temperature distribution, stress distribution, von Mises stress distribution, effects on specific tool pressure and wear, and fluctuations in the cutting resistance of the tool tip and C45 workpiece were analyzed.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 2; 653--659
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental modeling of the milling process of aluminum alloys used in the aerospace industry
Autorzy:
Țîțu, Aurel Mihail
Pop, Alina Bianca
Nabiałek, Marcin
Dragomir, Camelia Cristina
Sandu, Andrei Victor
Powiązania:
https://bibliotekanauki.pl/articles/2086888.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
mathematical modeling
experimental research
process parameters
machined surface quality
quality assurance
modelowanie matematyczne
badania eksperymentalne
parametry procesu
jakość obrabianej powierzchni
zapewnienie jakości
Opis:
This research presents an experimental study carried out for the modeling and optimization of some technological parameters for the machining of metallic materials. Certain controllable factors were analyzed such as cutting speed, depth of cut, and feed per tooth. A dedicated research methodology was used to obtain a model which subsequently led to a process optimization by performing a required number of experiments utilizing the Minitab software application. The methodology was followed, and the optimal value of the surface roughness was obtained by the milling process for an aluminum alloy type 7136-T76511. A SECO cutting tool was used, which is standard in aluminum machining by milling. Experiments led to defining a cutting regime that was optimal and which shows that the cutting speed has a significant influence on the quality of the machined surface and the depth of cut and feed per tooth has a relatively small impact on the chosen ranges of process parameters.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2021, 69, 5; e138565, 1--9
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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