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[nazev] => Komora pro kalibraci senzorů tepelné pohody
[nazev_orig] => Komora pro kalibraci senzorů tepelné pohody
[duvernost_udaju_id] => S
[popis] => Kalibrační komora je určena pro kalibraci vyvíjených čidel typu umělá kůže, operativní teploty, černých plochých teploměrů apod. Kalibrované senzory jsou vkládány do středu komory, jejíž tepelný stav je monitorován jednak na stěnách komory a jednak uvnitř kalibračního prostoru.
[popis_orig] => Kalibrační komora je určena pro kalibraci vyvíjených čidel typu umělá kůže, operativní teploty, černých plochých teploměrů apod. Kalibrované senzory jsou vkládány do středu komory, jejíž tepelný stav je monitorován jednak na stěnách komory a jednak uvnitř kalibračního prostoru.
[klicova_slova] => Kalibrační komora, kalibrace, tepelný stav prostředí,
[klicova_slova_orig] => Kalibrační komora, kalibrace, tepelný stav prostředí,
[url] => http://ottp.fme.vutbr.cz/vysledkyvyzkumu/
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[citace_text] => JANEČKA, J.; MLČÁK, R.; KAZKAZ, M.; KOŠÍKOVÁ, J.; VDOLEČEK, F.; PAVELEK, M.: Komora pro kalibraci senzorů tepelné pohody. URL: http://ottp.fme.vutbr.cz/vysledkyvyzkumu/. (Funkční vzorek)
[citace_html] => JANEČKA, J.; MLČÁK, R.; KAZKAZ, M.; KOŠÍKOVÁ, J.; VDOLEČEK, F.; PAVELEK, M.: Komora pro kalibraci senzorů tepelné pohody. URL: http://ottp.fme.vutbr.cz/vysledkyvyzkumu/. (Funkční vzorek)
[citace_rtf] =>
[citace_bibtex] => @misc{BUT89654,
author="Jan {Janečka} and Roman {Mlčák} and Mohammad {Kazkaz} and Jana {Košíková} and František {Vdoleček} and Milan {Pavelek}",
title="Komora pro kalibraci senzorů tepelné pohody",
year="2011",
url="http://ottp.fme.vutbr.cz/vysledkyvyzkumu/",
note="Functioning sample"
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[poznamka_metriky] =>
[nazev_en] => Box for calibration of thermal comfort sensors
[popis_en] => The calibration box is intended for calibration of developed sensors such as synthetic skin type, operative temperature type, black flat thermometer, etc. Calibrated sensors are inserted into the center of the box, which thermal state is monitored both on the box walls and also inside the calibration space.
[klicova_slova_en] => Calibration box, calibration, environmental thermal state
[vysledek_datum] => 2011-12-20T00:00:00+01:00
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[nazev_orig] => Snímač pro monitorování rychlosti proudění vzduchu
[duvernost_udaju_id] => S
[popis] => Rychlost proudění vzduchu je důležitá fyzikální veličina pro hodnocení tepelného stavu prostředí. Vyvinutý senzor na bázi žárového anemometru se žhaveným tranzistorem umožní efektivně, snadno, levně a rychle měřit rychlost proudění vzduchu v mikroklimatu, a to za účelem informace o tepelné pohodě či nepohodě prostředí a regulace tepelného stavu mikroklimatu.
[popis_orig] => Rychlost proudění vzduchu je důležitá fyzikální veličina pro hodnocení tepelného stavu prostředí. Vyvinutý senzor na bázi žárového anemometru se žhaveným tranzistorem umožní efektivně, snadno, levně a rychle měřit rychlost proudění vzduchu v mikroklimatu, a to za účelem informace o tepelné pohodě či nepohodě prostředí a regulace tepelného stavu mikroklimatu.
[klicova_slova] => Termoanemometr, rychlost proudění vzduchu, tranzistorový termoanemometr
[klicova_slova_orig] => Termoanemometr, rychlost proudění vzduchu, tranzistorový termoanemometr
[url] => http://ottp.fme.vutbr.cz/vysledkyvyzkumu/
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[upravil] => Informační systém Automat
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[ins_ts] => 2025-09-22
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[citace_text] => JANEČKA, J.; KOŠÍKOVÁ, J.; VDOLEČEK, F.; PAVELEK, M.: Snímač pro monitorování rychlosti proudění vzduchu. URL: http://ottp.fme.vutbr.cz/vysledkyvyzkumu/. (Funkční vzorek)
[citace_html] => JANEČKA, J.; KOŠÍKOVÁ, J.; VDOLEČEK, F.; PAVELEK, M.: Snímač pro monitorování rychlosti proudění vzduchu. URL: http://ottp.fme.vutbr.cz/vysledkyvyzkumu/. (Funkční vzorek)
[citace_rtf] =>
[citace_bibtex] => @misc{BUT89656,
author="Jan {Janečka} and Jana {Košíková} and František {Vdoleček} and Milan {Pavelek}",
title="Snímač pro monitorování rychlosti proudění vzduchu",
year="2011",
url="http://ottp.fme.vutbr.cz/vysledkyvyzkumu/",
note="Functioning sample"
}
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[poznamka_metriky] =>
[nazev_en] => Air flow velocity sensor
[popis_en] => The airflow velocity is an important physical variable for the evaluation of the thermal state of the environment. The developed sensor on anemometer based of heating anemometer with preheating transistor is enabling to effectively, easily, cheaply and quickly measure the airflow velocity in microclimate for information on thermal comfort or discomfort of microclimate and for regulation of environment thermal state.
[klicova_slova_en] => Thermo-anemometer, airflow velocity, transistor thermo-anemometer
[vysledek_datum] => 2011-12-20T00:00:00+01:00
)
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[nazev] => Kompaktní snímač operativní teploty
[nazev_orig] => Kompaktní snímač operativní teploty
[duvernost_udaju_id] => S
[popis] => Kompaktní snímač operativní teploty je zařízení, které slouží pro hodnocení tepelného stavu prostředí pomocí operativní teploty. Snímač byl vyvinut v rámci projektu GAČR 101/09/H050. Snímač vyhodnocuje operativní teplotu z měřených parametrů prostředí. Jedná se o tyto parametry teplota vzduchu, střední radiační teplota rychlost proudění vzduchu a relativní vlhkost vzduchu.
[popis_orig] => Kompaktní snímač operativní teploty je zařízení, které slouží pro hodnocení tepelného stavu prostředí pomocí operativní teploty. Snímač byl vyvinut v rámci projektu GAČR 101/09/H050. Snímač vyhodnocuje operativní teplotu z měřených parametrů prostředí. Jedná se o tyto parametry teplota vzduchu, střední radiační teplota rychlost proudění vzduchu a relativní vlhkost vzduchu.
[klicova_slova] => Snímač operativní teploty, Teplota vzduchu, Střední radiační teplota, Vlhkost vzduchu, Tepelný stav prostředí
[klicova_slova_orig] => Snímač operativní teploty, Teplota vzduchu, Střední radiační teplota, Vlhkost vzduchu, Tepelný stav prostředí
[url] => http://ottp.fme.vutbr.cz/vysledkyvyzkumu/
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[citace_text] => JANEČKA, J.; KOŠÍKOVÁ, J.; VDOLEČEK, F.; PAVELEK, M.: Kompaktní snímač operativní teploty. URL: http://ottp.fme.vutbr.cz/vysledkyvyzkumu/. (Funkční vzorek)
[citace_html] => JANEČKA, J.; KOŠÍKOVÁ, J.; VDOLEČEK, F.; PAVELEK, M.: Kompaktní snímač operativní teploty. URL: http://ottp.fme.vutbr.cz/vysledkyvyzkumu/. (Funkční vzorek)
[citace_rtf] =>
[citace_bibtex] => @misc{BUT92886,
author="Jan {Janečka} and Jana {Košíková} and František {Vdoleček} and Milan {Pavelek}",
title="Kompaktní snímač operativní teploty",
year="2012",
url="http://ottp.fme.vutbr.cz/vysledkyvyzkumu/",
note="Functioning sample"
}
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[poznamka_metriky] =>
[nazev_en] => Compact Sensor of Operative Iemperature
[popis_en] => Compact sensor of operative temperature is device which is used for evaluating the thermal state of environment by operative temperature. The sensor was developed within the project GACR 101/09/H050. The sensor evaluates operative temperature of measured environmental parameters. These parameters are air temperature, mean radiant temperature air velocity and humidity.
[klicova_slova_en] => Sensor of operative temperature, Air temperature, Mean radiant temperature, Humidity, Thermal state of environment
[vysledek_datum] => 2012-07-12T00:00:00+02:00
)
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[nazev] => Comparison of Methods for Determination of Borders of Stream Visualized by Smoke Method
[nazev_orig] => Comparison of Methods for Determination of Borders of Stream Visualized by Smoke Method
[duvernost_udaju_id] => S
[popis] => Smoke visualization is the method which aims to obtain primary, especially qualitative information about the flow field. One of the visualization outputs is a plane cut of the flow (image). It is necessary to separate the flow region from the background with image segmentation because of information about its geometry. After this operation, the flow border points are detected.
[popis_orig] => Smoke visualization is the method which aims to obtain primary, especially qualitative information about the flow field. One of the visualization outputs is a plane cut of the flow (image). It is necessary to separate the flow region from the background with image segmentation because of information about its geometry. After this operation, the flow border points are detected.
[klicova_slova] => flow visualization; image segmentation; automotive vents; fluid mechanics; thresholding
[klicova_slova_orig] => flow visualization; image segmentation; automotive vents; fluid mechanics; thresholding
[url] =>
[oecd_obor_id] => 10305
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[druh_nazev] => Stať ve sborníku v databázi WoS či Scopus
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[nazev] => DETERMINATION OF SIGNIFICANT PROCESS PARAMETERS OF WEDM: Preliminary Study
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[popis] => Wire electrical discharge machining (WEDM) is a widely used process in manufacturing industries when precision machining of all types of conductive materials is needed. In the WEDM process the material is removed by a series of rapidly recurring current discharges between two electrodes, separated by a dielectric liquid and subject to an electric voltage. The paper's aim is to choose significant WEDM process parameters by means of statistical experiment. Furthermore, we derived the mathematical model for calculation of number of wire breaks with dependency of significant process parameters. The parameters of the model are obtained by simple genetic algorithms.
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[citace_text] => MOURALOVÁ, K.; BEDNÁŘ, J. DETERMINATION OF SIGNIFICANT PROCESS PARAMETERS OF WEDM: Preliminary Study. In MENDEL 2013. Mendel Journal series. ISCC. Brno: BUT, 2013. no. 19, p. 451-454. ISBN: 978-80-214-4755-4. ISSN: 1803-3814.
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[popis] => This paper presents an investigation on the effect and optimization of machining parameters on the width of kerf of titanium alloy (Ti-6Al-4V) using wire electrical discharge machining (WEDM). The experimental studies were conducted under varying Pulse off time, Pulse on time, Discharge current, wire speed and Gap voltage. The settings of machining parameters were determined by using Design of experiment. Statistical evaluation width of kerf by parameter settings on the machine was made using Analysis of Variance (ANOVA). Improved machining performance in the WEDM process has been achieved by using this approach.
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title="Statistical evaluation width of kerf after WEDM by Analysis of Variance",
journal="Mendel Journal series",
year="2016",
volume="2016",
number="22",
pages="301--304",
issn="1803-3814"
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[nazev_en] => Statistical evaluation width of kerf after WEDM by Analysis of Variance
[popis_en] => This paper presents an investigation on the effect and optimization of machining parameters on the width of kerf of titanium alloy (Ti-6Al-4V) using wire electrical discharge machining (WEDM). The experimental studies were conducted under varying Pulse off time, Pulse on time, Discharge current, wire speed and Gap voltage. The settings of machining parameters were determined by using Design of experiment. Statistical evaluation width of kerf by parameter settings on the machine was made using Analysis of Variance (ANOVA). Improved machining performance in the WEDM process has been achieved by using this approach.
[klicova_slova_en] => Design of Experiment, WEDM, electrical discharge machining, width of kerf, titanium Ti-6Al-4V, Analysis of Variance.
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[nazev] => Analyzing the surface layer after WEDM depending on the parameters of a machine for the 16MnCr5 steel
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[duvernost_udaju_id] => S
[popis] => The efficient wire electric discharge machining (WEDM) technology is an efficient trade-off between the cutting speed and the resulting surface quality. A typical morphology of a surface machined using WEDM contains a large number of craters caused by the electric sparks generated in the cutting process. The paper analyzes the influence of the cutting speed on the quantitative and qualitative evaluation of the surface craters formed on the surface of a workpiece made of the 16MnCr5 steel. Applying metallography to cross-section microscopic slides, diffusion subsurface damages were studied caused by the cutting. The diffusion processes taking place between the electrode and the material machined were studied using a local point EDX microanalysis applied both to the machined surfaces and to the cross sections. A detailed study was also carried out of the brass electrode to measure its wear rate caused by the cutting process as well as its degradation in terms of the quality of its morphology and the chemical composition of surface.
[popis_orig] => The efficient wire electric discharge machining (WEDM) technology is an efficient trade-off between the cutting speed and the resulting surface quality. A typical morphology of a surface machined using WEDM contains a large number of craters caused by the electric sparks generated in the cutting process. The paper analyzes the influence of the cutting speed on the quantitative and qualitative evaluation of the surface craters formed on the surface of a workpiece made of the 16MnCr5 steel. Applying metallography to cross-section microscopic slides, diffusion subsurface damages were studied caused by the cutting. The diffusion processes taking place between the electrode and the material machined were studied using a local point EDX microanalysis applied both to the machined surfaces and to the cross sections. A detailed study was also carried out of the brass electrode to measure its wear rate caused by the cutting process as well as its degradation in terms of the quality of its morphology and the chemical composition of surface.
[klicova_slova] => WEDM, electrical discharge machining, design of experiment, surface investigation, metallography, EDX
[klicova_slova_orig] => WEDM, electrical discharge machining, design of experiment, surface investigation, metallography, EDX
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[citace_text] => MOURALOVÁ, K.; MATOUŠEK, R.; KOVÁŘ, J.; MACH, J.; KLAKURKOVÁ, L.; BEDNÁŘ, J. Analyzing the surface layer after WEDM depending on the parameters of a machine for the 16MnCr5 steel. MEASUREMENT, 2016, vol. 2016, no. 94, p. 771-779. ISSN: 0263-2241.
[citace_html] => MOURALOVÁ, K.; MATOUŠEK, R.; KOVÁŘ, J.; MACH, J.; KLAKURKOVÁ, L.; BEDNÁŘ, J. Analyzing the surface layer after WEDM depending on the parameters of a machine for the 16MnCr5 steel. MEASUREMENT, 2016, vol. 2016, no. 94, p. 771-779. ISSN: 0263-2241.
[citace_rtf] =>
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author="Kateřina {Mouralová} and Radomil {Matoušek} and Jiří {Kovář} and Jindřich {Mach} and Lenka {Klakurková} and Josef {Bednář}",
title="Analyzing the surface layer after WEDM depending on the parameters of a machine for the 16MnCr5 steel",
journal="MEASUREMENT",
year="2016",
volume="2016",
number="94",
pages="771--779",
doi="10.1016/j.measurement.2016.09.028",
issn="0263-2241",
url="http://authors.elsevier.com/sd/article/S0263224116305310"
}
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[nazev_en] => Analyzing the surface layer after WEDM depending on the parameters of a machine for the 16MnCr5 steel
[popis_en] => The efficient wire electric discharge machining (WEDM) technology is an efficient trade-off between the cutting speed and the resulting surface quality. A typical morphology of a surface machined using WEDM contains a large number of craters caused by the electric sparks generated in the cutting process. The paper analyzes the influence of the cutting speed on the quantitative and qualitative evaluation of the surface craters formed on the surface of a workpiece made of the 16MnCr5 steel. Applying metallography to cross-section microscopic slides, diffusion subsurface damages were studied caused by the cutting. The diffusion processes taking place between the electrode and the material machined were studied using a local point EDX microanalysis applied both to the machined surfaces and to the cross sections. A detailed study was also carried out of the brass electrode to measure its wear rate caused by the cutting process as well as its degradation in terms of the quality of its morphology and the chemical composition of surface.
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[nazev] => Influence of the Cut Direction through the Semi-Finished Product on the Occurrence of Cracks for X210Cr12 Steel Using WEDM
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[popis] => Wire electrical discharge machining (WEDM) is a key technological process for the production of parts from semi-finished products to the final heat treatment as it also enables the machining of very hard material. The quality of an electro-erosive machined surface is a very important factor with regard to the consequent functionality and life cycle of the manufactured part. The occurrence of cracks or burned cavities is therefore an acceptable defect of the sub-surface area, which along with residual stress may lead to the destruction of the machining. This study deals with the influence of the cut direction through a semi-finished product on the occurrence of defects (cracks, burned cavities) regarding the influence of setting up the parameters of the machine (gap voltage, pulse on and off time, wire feed and discharge current) and the type of heat treatment of the material. In order to study the surface and sub-surface area of the machined samples, electron microscopy was used, including the use of the local EDX chemical analysis.
[popis_orig] => Wire electrical discharge machining (WEDM) is a key technological process for the production of parts from semi-finished products to the final heat treatment as it also enables the machining of very hard material. The quality of an electro-erosive machined surface is a very important factor with regard to the consequent functionality and life cycle of the manufactured part. The occurrence of cracks or burned cavities is therefore an acceptable defect of the sub-surface area, which along with residual stress may lead to the destruction of the machining. This study deals with the influence of the cut direction through a semi-finished product on the occurrence of defects (cracks, burned cavities) regarding the influence of setting up the parameters of the machine (gap voltage, pulse on and off time, wire feed and discharge current) and the type of heat treatment of the material. In order to study the surface and sub-surface area of the machined samples, electron microscopy was used, including the use of the local EDX chemical analysis.
[klicova_slova] => WEDM; electrical discharge machining; steel X210Cr12; morphology; topography; recast layer; cracks
[klicova_slova_orig] => WEDM; electrical discharge machining; steel X210Cr12; morphology; topography; recast layer; cracks
[url] => https://www.sciencedirect.com/science/article/pii/S1644966518300451
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[citace_text] => MOURALOVÁ, K.; KLAKURKOVÁ, L.; MATOUŠEK, R.; PROKEŠ, T.; HRDÝ, R.; KAŇA, V. Influence of the Cut Direction through the Semi-Finished Product on the Occurrence of Cracks for X210Cr12 Steel Using WEDM. Archives of Civil and Mechanical Engineering, 2018, vol. 18, no. 4, p. 1318-1331. ISSN: 1644-9665.
[citace_html] => MOURALOVÁ, K.; KLAKURKOVÁ, L.; MATOUŠEK, R.; PROKEŠ, T.; HRDÝ, R.; KAŇA, V. Influence of the Cut Direction through the Semi-Finished Product on the Occurrence of Cracks for X210Cr12 Steel Using WEDM. Archives of Civil and Mechanical Engineering, 2018, vol. 18, no. 4, p. 1318-1331. ISSN: 1644-9665.
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author="Kateřina {Mouralová} and Lenka {Klakurková} and Radomil {Matoušek} and Tomáš {Prokeš} and Radim {Hrdý} and Václav {Kaňa}",
title="Influence of the Cut Direction through the Semi-Finished Product on the Occurrence of Cracks for X210Cr12 Steel Using WEDM",
journal="Archives of Civil and Mechanical Engineering",
year="2018",
volume="18",
number="4",
pages="1318--1331",
doi="10.1016/j.acme.2018.04.004",
issn="1644-9665",
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[popis_en] => Wire electrical discharge machining (WEDM) is a key technological process for the production of parts from semi-finished products to the final heat treatment as it also enables the machining of very hard material. The quality of an electro-erosive machined surface is a very important factor with regard to the consequent functionality and life cycle of the manufactured part. The occurrence of cracks or burned cavities is therefore an acceptable defect of the sub-surface area, which along with residual stress may lead to the destruction of the machining. This study deals with the influence of the cut direction through a semi-finished product on the occurrence of defects (cracks, burned cavities) regarding the influence of setting up the parameters of the machine (gap voltage, pulse on and off time, wire feed and discharge current) and the type of heat treatment of the material. In order to study the surface and sub-surface area of the machined samples, electron microscopy was used, including the use of the local EDX chemical analysis.
[klicova_slova_en] => WEDM; electrical discharge machining; steel X210Cr12; morphology; topography; recast layer; cracks
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[nazev] => Quality of Surface and Subsurface Layers after WEDM Aluminum Alloy 7475-T7351 Including Analysis of TEM Lamella
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[popis] => Wire electrical discharge machining (WEDM) is an unconventional machining method indispensable especially for the aeronautical and automotive industries. In this context, the effective manufacturing of high surface quality components from aluminium alloy7475-T7351 requires comprehensive knowledge of the applied production procedures. We therefore performed a designed experiment comprising 33 cycles (with systematic alteration of machine setting parameters such as gap voltage, pulse on time, pulse off time, discharge current, and wire feed), enabling us to evaluate systematically the cutting speeds in the relevant samples. The machined areas were subjected to a thorough analysis involving both the surface and the subsurface layers. The actual topography was assessed using a non-contact profiler, and the entire operation concentrated on 12 parameters within the areal, profile, and basic and bearingprofile categories.To observe the surface relief, we employed several instruments, including the semi-contact atomic force microscopy (AFM) technique;a digital microscope; and a non-contact 3D profiler. Another major step then consisted in examining the morphology and surface defects, a process suitably complemented with a chemical composition analysis (EDX). The distribution of individual elements within the material was investigated in detail using a lamella, whose subsequent inspection relied on atransmission electron microscope (TEM) as the principal tool. To study the subsurface layer and its defects, we prepared metallographic specimens (cross-sections) of the samples and observed them by means of light and electron microscopes.
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[klicova_slova] => WEDM; electrical discharge machining; aluminium alloy 7475-T7351; morphology; topography; TEM lamella; Design of experiment
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author="Kateřina {Mouralová} and Libor {Beneš} and Radim {Zahradníček} and Josef {Bednář} and Pavel {Hrabec} and Tomáš {Prokeš} and Radomil {Matoušek} and Zdeněk {Fiala}",
title="Quality of Surface and Subsurface Layers after WEDM Aluminum Alloy 7475-T7351 Including Analysis of TEM Lamella",
journal="International Journal of Advanced Manufacturing Technology",
year="2018",
volume="99",
number="9",
pages="2309--2326",
doi="10.1007/s00170-018-2626-1",
issn="0268-3768",
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[klicova_slova_en] => WEDM; electrical discharge machining; aluminium alloy 7475-T7351; morphology; topography; TEM lamella; Design of experiment
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[nazev] => Using a Design of Experiment for a Comprehensive Analysis of the Surface Quality and Cutting Speed in WED-Machined Hadfield Steel
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[popis] => Wire Electrical Discharge Machining (WEDM) is an unconventional machining method used to manufacture complex-shaped, precise components. Considering the high-energy intensity of the wire erosion process, its effective implementation requires a maximum cutting speed while still ensuring the best possible quality of the machined surface. For this latter purpose, we conducted a design of experiment (DoE) comprising 33 cycles and five input factors, or machine setting parameters: gap voltage, pulse on time, pulse off time, discharge current, and wire feed. In this context, the present paper statistically evaluates the cutting speed in Hadfield steel, as related to machine setting parameters, and it also analyzes the machined surfaces of the applied samples. The actual experiment involved examining in detail the topography of the surfaces, using one contact and three non-contact profilers. The surface morphologies were observed via electron microscopy, and a lamella was prepared to facilitate the chemical composition analysis (EDX) with a transmission electron microscope (TEM). To study the subsurface layer and its defects, we produced metallographic specimens of all the samples; the observation of the items was performed by means of light and electron microscopes. With a maximum cutting speed the highest quality of the machined surface was achieved; however, the burned cavities can affect the life expectancy of the machined parts. The TEM lamella revealed that the individual alloying elements had segregated into regions, exhibiting high volumes of both manganese and the recast layer and, due to the use of WEDM, a manganese separation layer had formed at the boundary of the recast layer and the base material.
[popis_orig] => Wire Electrical Discharge Machining (WEDM) is an unconventional machining method used to manufacture complex-shaped, precise components. Considering the high-energy intensity of the wire erosion process, its effective implementation requires a maximum cutting speed while still ensuring the best possible quality of the machined surface. For this latter purpose, we conducted a design of experiment (DoE) comprising 33 cycles and five input factors, or machine setting parameters: gap voltage, pulse on time, pulse off time, discharge current, and wire feed. In this context, the present paper statistically evaluates the cutting speed in Hadfield steel, as related to machine setting parameters, and it also analyzes the machined surfaces of the applied samples. The actual experiment involved examining in detail the topography of the surfaces, using one contact and three non-contact profilers. The surface morphologies were observed via electron microscopy, and a lamella was prepared to facilitate the chemical composition analysis (EDX) with a transmission electron microscope (TEM). To study the subsurface layer and its defects, we produced metallographic specimens of all the samples; the observation of the items was performed by means of light and electron microscopes. With a maximum cutting speed the highest quality of the machined surface was achieved; however, the burned cavities can affect the life expectancy of the machined parts. The TEM lamella revealed that the individual alloying elements had segregated into regions, exhibiting high volumes of both manganese and the recast layer and, due to the use of WEDM, a manganese separation layer had formed at the boundary of the recast layer and the base material.
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[popis] => Surface treatments are typical surface protection against corrosion or serve to create an attractive appearance for the end customer. However, the surface to which they are applied must be completely oxide-free, otherwise, defects occur which can cause subsequent corrosion or deterioration of the visual appearance of the product. The parts manufactured by wire electrical discharge machining (WEDM), however, have a high tendency to oxidize. For this reason, this study was aimed at demonstrating the effect of machine setup parameters (gap voltage, pulse on and off time, wire feed and discharge current) on oxygen occurrence on the surface of two non-metallic (aluminium alloy 7475-T7351, chromium nickel superalloy Inconel 625) and four metallic materials (tool alloy steel X210Cr12, Hadfield steel, Creusabro 4800 and Hardox 400). Within this study, 18 samples were produced, where the chemical composition of EDX was analysed, on the basis of which the effect of these parameters on the surface oxidation was proved.
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[popis] => Wire electrical discharge machining is an unconventional machining method for the production of complex-shaped and very precise parts. Because of the high energy consumption of this machining process, it is necessary to maximize the cutting speed for its appropriate implementation. The abrasion-resistant steel Creusabro 4800 was chosenas the test material for this experiment, which is widely used especially for machines working in mines and quarries.In order to maximize the cutting speed, a fuzzy inference system (FIS) has been built, which uses 18 expert propositions to “model” the cutting speed based on fiveselected input parameters: gap voltage, pulse on time, pulse off time, discharge current, and wire feed. The obtained results were further verified by a design of experiment consisting of 33 tests for fiveselected input factors. Using the fuzzy inference system, the optimum machine parameters setup was found to maximize the cutting speed, in which the gap voltage = 60 V, pulse on time = 10 µs, pulse off time = 30 µs, wire feed = 10 m∙min−1 and discharge current = 35 A. The predicted value of the cutting speed using the fuzzy inference system is 6.471 mm∙min−1.
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[citace_text] => MOURALOVÁ, K.; HRABEC, P.; BENEŠ, L.; OTOUPALÍK, J.; BEDNÁŘ, J.; PROKEŠ, T.; MATOUŠEK, R. Verification of Fuzzy Inference System for Cutting Speed while WEDM for the Abrasion-Resistant Steel Creusabro by Conventional Statistical Methods. Metals, 2020, vol. 10, no. 1, p. 1-11. ISSN: 2075-4701.
[citace_html] => MOURALOVÁ, K.; HRABEC, P.; BENEŠ, L.; OTOUPALÍK, J.; BEDNÁŘ, J.; PROKEŠ, T.; MATOUŠEK, R. Verification of Fuzzy Inference System for Cutting Speed while WEDM for the Abrasion-Resistant Steel Creusabro by Conventional Statistical Methods. Metals, 2020, vol. 10, no. 1, p. 1-11. ISSN: 2075-4701.
[citace_rtf] =>
[citace_bibtex] => @article{BUT161051,
author="Kateřina {Mouralová} and Pavel {Hrabec} and Libor {Beneš} and Jan {Otoupalík} and Josef {Bednář} and Tomáš {Prokeš} and Radomil {Matoušek}",
title="Verification of Fuzzy Inference System for Cutting Speed while WEDM for the Abrasion-Resistant Steel Creusabro by Conventional Statistical Methods",
journal="Metals",
year="2020",
volume="10",
number="1",
pages="1--11",
doi="10.3390/met10010092",
url="https://www.mdpi.com/2075-4701/10/1/92"
}
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[nazev_en] => Verification of Fuzzy Inference System for Cutting Speed while WEDM for the Abrasion-Resistant Steel Creusabro by Conventional Statistical Methods
[popis_en] => Wire electrical discharge machining is an unconventional machining method for the production of complex-shaped and very precise parts. Because of the high energy consumption of this machining process, it is necessary to maximize the cutting speed for its appropriate implementation. The abrasion-resistant steel Creusabro 4800 was chosenas the test material for this experiment, which is widely used especially for machines working in mines and quarries.In order to maximize the cutting speed, a fuzzy inference system (FIS) has been built, which uses 18 expert propositions to “model” the cutting speed based on fiveselected input parameters: gap voltage, pulse on time, pulse off time, discharge current, and wire feed. The obtained results were further verified by a design of experiment consisting of 33 tests for fiveselected input factors. Using the fuzzy inference system, the optimum machine parameters setup was found to maximize the cutting speed, in which the gap voltage = 60 V, pulse on time = 10 µs, pulse off time = 30 µs, wire feed = 10 m∙min−1 and discharge current = 35 A. The predicted value of the cutting speed using the fuzzy inference system is 6.471 mm∙min−1.
[klicova_slova_en] =>
WEDM (wire electrical discharge machining); electrical discharge machining; fuzzy inference system; FIS; Creusabro; cutting speed; design of experiment
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