Autor: Svetlík, J. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: CNC milling machine precision analysis through numerical modelling
Autorzy:: Svetlík, J.
Demeč, P.
Kráľ, J.
Powiązania:: https://bibliotekanauki.pl/articles/102601.pdf
Data publikacji:: 2017
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: accuracy of manufacturing machine
virtual prototyping
modal analysis
virtual model
Opis:: The motive behind the effort to make virtual prototyping more sophisticated is first of all cost reduction of manufacturing machine design, followed by reduction of lead time for development, prototyping and testing of the pre-manufacturing machine series. This article deals with the analysis of manufacturing precision of a 3-axial, numerically controlled milling machine. The methodology for precision analysis rests on a selected simplified numerical calculation model of a manufacturing machine on which virtual machining has been conducted. The mechanical inaccuracy itself is calculated by computer via the FEM analysis. The results are processed for visualization by the Excel software.
Źródło:: Advances in Science and Technology. Research Journal; 2017, 11, 2; 212-219
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Elimination of thermal drift in measuring the positioning accuracy of a three axis milling machine
Autorzy:: Stejskal, T.
Dovica, M.
Demeč, P.
Svetlík, J.
Rajťuková, V.
Powiązania:: https://bibliotekanauki.pl/articles/102352.pdf
Data publikacji:: 2017
Wydawca:: Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:: accuracy
laser interferometer
positioning
machine tool
Opis:: The aim of this paper is to draw attention to more reliable verification method of positioning accuracy. The improvement lies in mathematical elimination of thermal impact during the measurement process. This thermal impact, always present during the motion of movable parts, is of a special systemic character. It increases the indefiniteness of measurement of the classic measurement method. This measurement uncertainty can be reduced by implementing the procedure introduced in this paper. The reduction can be achieved by separating the temperature impact from other sources of inaccuracy. Such separation is a very new solution. The methodology relies on mathematical processing and does not depend on the manner of accuracy measurement. The evaluation method also yields diagnostic information on the machine’s condition. The experiments were performed with the use of laser interferometer.
Źródło:: Advances in Science and Technology. Research Journal; 2017, 11, 4; 159-167
2299-8624
Pojawia się w:: Advances in Science and Technology. Research Journal
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Fire of personal motor vehicle
Pożary samochodów osobowych
Autorzy:: Makovicka Osvaldova, L.
Svetlik, J.
Powiązania:: https://bibliotekanauki.pl/articles/373490.pdf
Data publikacji:: 2012
Wydawca:: Centrum Naukowo-Badawcze Ochrony Przeciwpożarowej im. Józefa Tuliszkowskiego
Tematy:: pomiar temperatury
pożar
przebieg pożaru
samochód osobowy
course of fire
fire
personal motor vehicle
temperature measurement
Opis:: Passenger vehicle fires are part of everyday life. Every year an increasing number of such fires and the damage growth contribute to increasing the intensity of the survey causes the development of fire vehicle and vehicle behaviour during combustion. The resources available for research during a fire are given to a group of Japanese scientists who published their finding in the journal "Fire Safety Journal". The research was aimed to drive sedan category. Authors summarize the results in four types of experiments; where then describe the temperature, heat flux, and deformation phenomena achieved in a fire. Europe, similar research done on the car and its products, but that information and the measured data wasn.t publishing. The article presents the results of experimental burning of cars in real life. Under real conditions in the experiments considered standing vehicles on 4 wheels in a horizontal position, and measured the initial environmental conditions (weather conditions). The solutions of grant tasks were performed 10 trials in 5 experiments. For each test was initiated by the fire in the engine compartment and passenger compartment, which were dealt with several sub-tasks. The main task was to describe the sequence of initiation of combustion in the engine compartment with a focus on measuring the temperature during combustion. Another sub-task was to investigate the flame skipping from vehicle to vehicle when stopped in the parking lot, and the interior and exterior. During the tests were measured in the temperature dependence of burning time. The results were then used in a computer simulation of fire development in cars.
Artykuł przedstawia wyniki badań pożarów samochodów osobowych w warunkach realnych. W ramach grantu wykonano pięć badań, po dwie próby w każdym. W poszczególnych próbach pożar inicjowano w obrębie silnika albo w przestrzeni dla pasażerów. Kolejnym zadaniem cząstkowym było badanie przeskakiwania płomienia z samochodu na samochód podczas parkowania w przestrzeniach zamkniętych, jak i otwartych. Podczas badań dokonywano pomiaru temperatury w zależności od czasu. Wyniki zostały wykorzystane w symulacji rozwoju pożaru samochodu osobowego.
Źródło:: Bezpieczeństwo i Technika Pożarnicza; 2012, 2; 21-26
1895-8443
Pojawia się w:: Bezpieczeństwo i Technika Pożarnicza
Dostawca treści:: Biblioteka Nauki

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