Autor: Winiarski, Z. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Decreasing of thermal errors in a lathe by forced cooling of ball screws and a headstock
Autorzy:: Winiarski, Z.
Kowal, Z.
Błażejewski, A.
Powiązania:: https://bibliotekanauki.pl/articles/1429161.pdf
Data publikacji:: 2008
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: lathe
feed mechanism
cooling
thermal error
calculation
Opis:: The goal of this paper is to present the effective methods of decreasing thermal deformations of a turning centre's structure in order to reduce the thermal error. The design of a machine tool as well as the scope of analyses are described, and calculation methods are specified. The paper also presents the results of computer simulations, concerning studies on the influence of type and parameters of a headstock-cooling liquid on the reduction of spindle displacements. Moreover, the results of feed mechanism's thermal studies are shown, describing the influence of heat generated during the operation of ball screws and their inner liquid cooling, on tool's thermal displacements.
Źródło:: Journal of Machine Engineering; 2008, 8, 4; 122-130
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Precise modelling of machine tool drives with ball screw thermal behavior
Autorzy:: Winiarski, Z.
Kowal, Z.
Jędrzejewski, J.
Kwaśny, W.
Powiązania:: https://bibliotekanauki.pl/articles/100072.pdf
Data publikacji:: 2017
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: machine tool
feed drive
ball screw
moving heat sources
numerical simulation
Opis:: This paper briefly describes the current requirements which machine tool ball screws must meet and indicates the need for the modelling and numerical simulation of the latter. The structure of a holistic ball screw model and ways of modelling the properties of the ball screw in a turning centre, including the moving heat sources on the guides and in the screw-nut joint, are presented. The results of computing the heating up and displacements of a preloaded screw and the screw without preload are reported. The modelled changes in motion resistance and in displacements are shown to be in agreement with the results of measuring the current drawn by the drive’s motor. It is also shown that the models represent well the real physical phenomena occurring in the ball screw during the execution of repeatable work cycles by the drive.
Źródło:: Journal of Machine Engineering; 2017, 17, 1; 31-45
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Development of the modelling and numerical simulation of the thermal properties of machine tools
Autorzy:: Jędrzejewski, J.
Kwaśny, W.
Kowal, Z.
Winiarski, Z.
Powiązania:: https://bibliotekanauki.pl/articles/99438.pdf
Data publikacji:: 2014
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: machine tool
modelling
numerical analysis
thermal properties
Opis:: This paper highlights the need for the holistic modelling of the thermal properties of machine tools to provide a good basis for the effective aiding of machine tool design and optimization. A brief history of this modelling and the idea of accurate modelling and its experimental verification are presented. Examples of the holistic modelling of drive units both isolated from the machine tool and interconnected with its structure are provided.
Źródło:: Journal of Machine Engineering; 2014, 14, 3; 5-20
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Thermal model of the spindle drive structure
Autorzy:: Winiarski, Z.
Kowal, Z.
Kwaśny, W.
Ha, J.-Y.
Powiązania:: https://bibliotekanauki.pl/articles/99430.pdf
Data publikacji:: 2010
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: machine tool
spindle unit temperature
thermal deformations
model
Opis:: A computation system dedicated for machine tool spindle drives is presented which integrates a FDM model with a FEM model. Modelling of heat exchange through coolers are discussed, as well as modelling of heat exchange between cooling-lubricating oil and gear transmissions, shafts and headstock walls. In modelling of heat exchange inside headstock, the use of additional elements - type "Fluid" and "Air" - is proposed. Sample modelling results are presented concerning a headstock from a drilling-milling machine tool for machining with high loads and are compared with experimental data.
Źródło:: Journal of Machine Engineering; 2010, 10, 4; 41-52
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Modelling thermal deformation of tilting rotary table with direct drive system
Autorzy:: Winiarski, Z.
Kwaśny, W.
Jędrzejewski, J.
Gim, T-W.
Powiązania:: https://bibliotekanauki.pl/articles/99587.pdf
Data publikacji:: 2010
Wydawca:: Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
Tematy:: machine tool
tilting rotary table
thermal deformation
model
Opis:: Mathematical models representing power losses in tilting rotary tables with a direct drive system (increasingly often used in CNC machine tools) are presented. The process of creating an FEM model for computing the heating up and thermal deformation of tilting rotary tables is described. A simple way of verifying the FEM model on the basis of motor catalogue specifications is provided. Exemplary results of computations and thermal analyses carried out for a tilting rotary table with a synchronized two-sided direct drive system are reported.
Źródło:: Journal of Machine Engineering; 2010, 10, 4; 26-40
1895-7595
2391-8071
Pojawia się w:: Journal of Machine Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: XPS Investigation of $Y_{1-x}Dy_xNi_2B_2C$ Superconductors
Autorzy:: Winiarski, A.
Winiarska, A.
Drzazga, Z.
Powiązania:: https://bibliotekanauki.pl/articles/1812333.pdf
Data publikacji:: 2008-07
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 71.20.-b
74.25.Jb
74.70.-b
82.80.Pv
Opis:: The analysis of the valence band photoemission spectra of $Y_{1-x}Dy_xNi_2B_2C$ (0≤x≤1) is presented. The valence bands are mainly plotted for Ni 3d, Y 4d and Dy 4f contributions, according to theoretical predictions. The valence bands of $Y_{1-x}Dy_xNi_2B_2C$ compounds markedly change shape with the x parameter, especially in the binding energy region from 3 eV to 14 eV. For large content of Dy (above 55%) the valence band is predominant by Dy 4f states whereas Ni 3d states govern the valence band of yttrium rich compounds. Changing in domination of valence sub-band correlates with plot of superconducting transition temperature $T_c$ with Dy concentration.
Źródło:: Acta Physica Polonica A; 2008, 114, 1; 243-246
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Breakdown of the De Gennes Scaling in Y$\text{}_{1-x}$Dy$\text{}_{x}$Ni$\text{}_{2}$B$\text{}_{2}$C
Autorzy:: Drzazga, Z.
Winiarska, A.
Winiarski, A.
Kaczorowski, D.
Powiązania:: https://bibliotekanauki.pl/articles/2012891.pdf
Data publikacji:: 2000-01
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 74.25.Ha
74.72.-h
82.80.Pv
Opis:: Single crystals of Y$\text{}_{1-x}$Dy$\text{}_{x}$Ni$\text{}_{2}$B$\text{}_{2}$C (1 ≤ x ≤ 0.7) were examined by X-ray diffraction and stoichiometry was attested by XPS measurements. The superconducting transition temperature T$\text{}_{c}$ and Neel temperature T$\text{}_{N}$ were determined by means of magnetisation measurements. A dramatic breakdown of the de Gennes scaling in the Dy-rich compounds was found when T$\text{}_{c}$
Źródło:: Acta Physica Polonica A; 2000, 97, 1; 221-224
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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