Temat: surface - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Surface irregularities as a complex signal of tool representation together with uneven displacement in respect to the workpiece
Autorzy:: Boryczko, A.
Rytlewski, W.
Tematy:: surface irregularities
surface profile
tool profile
surface disturbances
tool displacements; Pokaż więcej
Data publikacji:: 2014
Powiązania:: https://bibliotekanauki.pl/articles/221576.pdf Link otwiera się w nowym oknie
Źródło:: Metrology and Measurement Systems; 2014, 21, 1; 133-144
0860-8229
Pojawia się w:: Metrology and Measurement Systems
Opis:: In a dynamic machining process, distortion in surface irregularity is a very complex phenomenon. Surface irregularities form a periodic representation of the tool profile with various kinds of disturbance in a broad range of changes in the height and length of the profile. To discern these irregularity disturbances, interactions of the tool in the form of changes perpendicular and parallel relative to the workpiece were analyzed and simulated. The individual kinds of displacement of the tool relative to the workpiece introduce distortions in the changes of height and length. These changes are weakly represented in standard height and length irregularity parameters and their discernment has been found through amplitude-frequency functions.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 2.

Tytuł:: A 4₃ configuration of lines and conics in ℙ⁵
Autorzy:: Szemberg, Tomasz
Tematy:: configuration
Kummer surface
abelian surface; Pokaż więcej
Data publikacji:: 1994
Powiązania:: https://bibliotekanauki.pl/articles/1311649.pdf Link otwiera się w nowym oknie
Źródło:: Annales Polonici Mathematici; 1994-1995, 60, 2; 145-158
0066-2216
Pojawia się w:: Annales Polonici Mathematici
Opis:: Studying the connection between the title configuration and Kummer surfaces we write explicit quadratic equations for the latter. The main results are presented in Theorems 8 and 16.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 3.

Tytuł:: Effect of Flap Peening Speed on the Surface Quality and Micro Hardness of Aircraft Aluminum Alloys
Autorzy:: Shaban, Nabeel Abu
Alshabatat, Nabeel
Al-Qawabah, Safwan
Tematy:: surface roughness
surface quality
material processing
flap speed
surface hardness; Pokaż więcej
Data publikacji:: 2022
Powiązania:: https://bibliotekanauki.pl/articles/2125528.pdf Link otwiera się w nowym oknie
Źródło:: Archives of Metallurgy and Materials; 2022, 67, 3; 855-862
1733-3490
Pojawia się w:: Archives of Metallurgy and Materials
Opis:: Flap peening (FP) is a cold working technique used to apply a compressive force using small shots, this will lead to enhance the surface properties that it can sustain for long life during working conditions. In this study, several aircraft aluminum alloys materials namely; 2219 T6, 2024 T6, 7075 T6, and 6061 T6 were flap peened under different rotational speeds. The effect of rotational speed on the average surface roughness (Ra) and average surface micro hardness have been investigated. As seen by the Scanning Electron Microscope SEM phots that the hardness of peened layer is increased. It was found that as the flap peening speeds increase the percent change in surface roughness (Ra) increases, and the percent change in surface micro hardness decreases. The maximum increase in Ra occurs in 2219 T80 and the minimum in 6061 T6 alloys, and for hardness, it is reported that the maximum occurs in 6061 T6 and the minimum in 2019 T80 alloy.
Dostawca treści:: Biblioteka Nauki

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na półce

Skocz do pozycji: 4.

Tytuł:: A low-cost, simple optical setup for a fast scatterometry surface roughness measurements with nanometric precision
Autorzy:: Kucharski, D.
Zdunek, H.
Tematy:: scatterometry
surface texture
optical measurement systems
surface metrology
surface roughness; Pokaż więcej
Data publikacji:: 2020
Powiązania:: https://bibliotekanauki.pl/articles/200883.pdf Link otwiera się w nowym oknie
Źródło:: Bulletin of the Polish Academy of Sciences. Technical Sciences; 2020, 68, 3; 485-490
0239-7528
Pojawia się w:: Bulletin of the Polish Academy of Sciences. Technical Sciences
Opis:: We present a prototype of a simple, low-cost setup for a fast scatterometric surface texture measurements. We used a total integrated scatter method (TIS) with a semiconductor laser (λ = 638 nm) and a Si photodiode. Using our setup, we estimated the roughness parameters Rq for two reference surfaces (Al mirrors with flatness λ/10) and seven equal steel plates to compare. The setup is easily adaptable for a fast, preliminary manufacturing quality control. We show is possible to construct a low-cost measurement system with nanometric precision.
Dostawca treści:: Biblioteka Nauki

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na półce

Skocz do pozycji: 5.

Tytuł:: Metrological Aspects of Surface Topographies Produced by Different Machining Operations Regarding Their Potential Functionality
Autorzy:: Żak, K.
Grzesik, W.
Tematy:: surface metrology
surface topography
surface roughness
areal parameters
machining operations; Pokaż więcej
Data publikacji:: 2017
Powiązania:: https://bibliotekanauki.pl/articles/220573.pdf Link otwiera się w nowym oknie
Źródło:: Metrology and Measurement Systems; 2017, 24, 2; 325-335
0860-8229
Pojawia się w:: Metrology and Measurement Systems
Opis:: This paper presents a comprehensive methodology for measuring and characterizing the surface topographies on machined steel parts produced by precision machining operations. The performed case studies concern a wide spectrum of topographic features of surfaces with different geometrical structures but the same values of the arithmetic mean height Sa. The tested machining operations included hard turning operations performed with CBN tools, grinding operations with Al2O3 ceramic and CBN wheels and superfinish using ceramic stones. As a result, several characteristic surface textures with the Sa roughness parameter value of about 0.2 μm were thoroughly characterized and compared regarding their potential functional capabilities. Apart from the standard 2D and 3D roughness parameters, the fractal, motif and frequency parameters were taken in the consideration.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 6.

Tytuł:: Free-form surface data registration and fusion. The case of roughness measurements of a convex surface
Autorzy:: Zawada-Tomkiewicz, Anna
Tematy:: stitching data
surface measurement
free-form surface; Pokaż więcej
Data publikacji:: 2019
Powiązania:: https://bibliotekanauki.pl/articles/221231.pdf Link otwiera się w nowym oknie
Źródło:: Metrology and Measurement Systems; 2019, 26, 2; 323-333
0860-8229
Pojawia się w:: Metrology and Measurement Systems
Opis:: Combining surface measurement data from individual measurements of surface fragments is an issue that has been recognized for flat surfaces. The connection takes place on the principle of making ‘overlap’ measurements according to a specific measurement strategy, and then the algorithm synthesizes the measurement data for the common part (data fusion). This paper presents a method of combining partial data into one larger set using image processing methods. The purpose of the analysis is to combine surface data of a more complex shape in terms of surface roughness and waviness. A successful attempt was made to combine surface measurement data located on a cylindrical surface - convex surface. A rotated table was designed and used for surface data acquisition. The datasets were acquired with the use of CCI 6000 (366μm - 366μm) with the assumed overlapping of at least 20%. The measurement datasets were first pre-processed: filling in non-measured points, levelling and form removing were applied. For such processed datasets, the common part was identified (data registration) and then the data fusion was performed. An example of stitching the surface datasets shows usefulness of the presented methodology.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 7.

Tytuł:: Influence of grinding conditions on the topographic characteristic of machined surfaces
Autorzy:: Żak, K.
Tematy:: surface texture
surface roughness
hard machining
grinding; Pokaż więcej
Data publikacji:: 2014
Powiązania:: https://bibliotekanauki.pl/articles/100111.pdf Link otwiera się w nowym oknie
Źródło:: Journal of Machine Engineering; 2014, 14, 2; 47-56
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Opis:: 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.
Dostawca treści:: Biblioteka Nauki

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na półce

Skocz do pozycji: 8.

Tytuł:: Optimization of cutting parameters on surface roughness and productivity when milling wood materials
Autorzy:: Loc, Nguyen Huu
Hung, Trinh Quoc
Tematy:: surface roughness
response surface
milling method
optimization; Pokaż więcej
Data publikacji:: 2021
Powiązania:: https://bibliotekanauki.pl/articles/2052204.pdf Link otwiera się w nowym oknie
Źródło:: Journal of Machine Engineering; 2021, 21, 4; 72-89
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Opis:: The quality of the machined surface is one of the most important criteria when products are processed. For different materials, there are differentially fitting processing technologies and cutting modes to ensure that the parts have surface roughness in the allowed value range. In this paper, the research on surface roughness of machining tropical wood by milling method is presented. It is necessary to establish and solve the optimal problems with such aims as the highest surface quality, minimum cutting power and the highest productivity in the optimal cutting mode. Using a great amount of experimental planning and many constrained nonlinear optimization problem solving methods, the authors built a process and solved the problem to determine the optimal cutting parameters such as feed per tooth Sz, tool tip radius ρ, depth of cut h, etc. that satisfy the above object. Research object is tropical wood chukrasia and this is the database to design woodworking machines by milling method and choose a reasonable working mode when processing on CNC machines.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 9.

Tytuł:: The Impact of an Ultrasound-Assisted Mixing Method for Varnish Systems on The Varnish Layer’s Surface Hardness and Surface Scratch Resistance
Autorzy:: Goktas, Osman
Akdemir, Emirhan
Yeniocak, Mehmet
Colak, Mehmet
Tematy:: varnish
ultrasound
surface hardness
surface scratch resistance; Pokaż więcej
Data publikacji:: 2024
Powiązania:: https://bibliotekanauki.pl/articles/59115452.pdf Link otwiera się w nowym oknie
Źródło:: Drewno. Prace Naukowe. Doniesienia. Komunikaty; 2024, 67, 213; Art. no. 192277
1644-3985
Pojawia się w:: Drewno. Prace Naukowe. Doniesienia. Komunikaty
Opis:: The objective of this study was to determine the effects of mechanical and ultrasound-assisted stirring methods for varnish systems on the varnish layer’s surface hardness and surface scratch resistance. The study focused on polyurethane, acrylic, and polyester varnish systems, which were applied to three distinct wood types: Scots pine (Pinus sylvestris L.), Turkish beech (Fagus orientalis Lipsky), and African mahogany (Khaya ivorensis A. Chev.). The mixing processes included mechanical stirring for 3 and 5 minutes, as well as ultrasound-assisted stirring with differing power levels (80 W and 120 W) for 3 and 5 minutes. The highest surface hardness (175.10) was achieved using polyester varnish obtained by mechanical stirring for 3 minutes and applied to Turkish beech, while the lowest surface hardness (66.80) was observed for acrylic varnish obtained by 120 W ultrasound-assisted stirring for 5 minutes and applied to African mahogany. The highest surface scratch resistance (0.760 N) was observed with polyester varnish obtained by mechanical stirring for 5 minutes and applied to Scots pine, and also with acrylic varnish obtained by 80 W ultrasound-assisted stirring for 3 minutes and applied to Turkish beech. Overall, the findings suggested that the ultrasound-assisted mixing method generally fell short in terms of enhancing the varnish properties compared with the mechanical mixing technique.
Dostawca treści:: Biblioteka Nauki

Artykuł

na półce

Skocz do pozycji: 10.

Tytuł:: Advancements in near-surface seismicreflection acquisition
Autorzy:: Miller, B. E.
Tsoflias, G. P.
Steeples, D. W.
Tematy:: near-surface seismology
near-surface seismic refl ection
near-surface seismic acquisition; Pokaż więcej
Data publikacji:: 2010
Powiązania:: https://bibliotekanauki.pl/articles/115499.pdf Link otwiera się w nowym oknie
Źródło:: Challenges of Modern Technology; 2010, 1, 1; 14-18
2082-2863
2353-4419
Pojawia się w:: Challenges of Modern Technology
Opis:: 3-D seismic refl ection methods have been established as the predominant seismic method for hydrocarbon exploration. While this is true for exploration scale surveys the same is not yet true for near-surface seismic refl ection investigations. While the benefi ts of employing 3-D methods have been documented they are yet to be fully adopted by the near-surface community. There are a number of reasons for this; primary among them is the labor involved with planting and re-cabling large numbers of geophones. The amount of time and labor involved in these operations has been a direct hindrance for 3-D investigations of the near-surface. To help overcome these limitations The University of Kansas geophysics group has developed a portable, automated seismic data acquisition system, known as the autojuggie. The autojuggie allows for effi cient ultra-shallow seismic imaging and is capable of quickly performing non-invasive, high-resolution 2-D or 3-D seismic surveys by deploying a dense array of geophones.
Dostawca treści:: Biblioteka Nauki

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