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    Wyświetlanie 1-11 z 11
    Tytuł:
    Introducing Advanced Data Analytics in Perspective of Industry 4.0 in a Die Casting Foundry
    Autorzy:
    Perzyk, M.
    Dybowski, B.
    Kozłowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/381424.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    application of information technology
    foundry industry
    mechanical properties
    die casting
    process control
    data analytics
    zastosowanie technologii informatycznych
    przemysł odlewniczy
    właściwości mechaniczne
    odlewanie
    kontrola procesu
    analityka danych
    Opis:
    The paper presents some aspects of a development project related to Industry 4.0 that was executed at Nemak, a leading manufacturer of the aluminium castings for the automotive industry, in its high pressure die casting foundry in Poland. The developed data analytics system aims at predicting the casting quality basing on the production data. The objective is to use these data for optimizing process parameters to raise the products’ quality as well as to improve the productivity. Characterization of the production data including the recorded process parameters and the role of mechanical properties of the castings as the process outputs is presented. The system incorporates advanced data analytics and computation tools based on the analysis of variance (ANOVA) and applying an MS Excel platform. It enables the foundry engineers and operators finding the most efficient process variables to ensure high mechanical properties of the aluminium engine block castings. The main features of the system are explained and illustrated by appropriate graphs. Chances and threats connected with applications of the data-driven modelling in die casting are discussed.
    Źródło:
    Archives of Foundry Engineering; 2019, 1; 53-57
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of Non-Metallic Inclusions Formed as a Result of Deoxidation on the Fatigue Strength of 15CrNi6 and 16MnCr5 Steel
    Autorzy:
    Lipa, S.
    Sawicki, J.
    Dybowski, K.
    Pietrasik, R.
    Januszewicz, B.
    Powiązania:
    https://bibliotekanauki.pl/articles/353324.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    fatigue strength
    non-metallic inclusions
    thermo-chemical treatment
    Opis:
    This paper presents the findings of fatigue strength tests of 15CrNi6 steel following low-pressure carburizing and oil quenching, subjected to cycles of one-sided three-point bending. The fatigue fractures were compared with the results of fatigue strength studies of 16MnCr5 steel following low-pressure carburizing and nitrogen quenching. The fatigue tests for 16MnCr5 steel were conducted as part of a high-cycle resonance test, with a pendular bending load. The study also involved an analysis of the effects on non-metallic inclusions in the structure on the mechanism of fatigue destruction. The inclusions were found to initiate fatigue cracks. In both cases, a similar method of a fatigue fissure initiation was observed, independent of the study method or specimen material.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 3; 1345-1350
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    High Strength Metallurgical Graphene – Mechanisms of Growth and Properties
    Grafen metalurgiczny o wysokiej wytrzymałości – mechanizmy wzrostu i właściwości
    Autorzy:
    Kula, P.
    Szymański, W.
    Kołodziejczyk, Ł.
    Atraszkiewicz, R.
    Dybowski, K.
    Grabarczyk, J.
    Pietrasik, R.
    Niedzielski, P.
    Kaczmarek, Ł.
    Cłapa, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/353046.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    graphene
    growth mechanism
    electrical properties
    grafen
    mechanizm wzrostu
    właściwości elektryczne
    Opis:
    In this work, the growth mechanisms of chemical vapor deposited and metallurgical graphene and their selected mechanical and electrical properties were investigated. The study revealed the influence of the growth mechanisms on monoand poly-crystalline nanostructures of synthesized graphene monolayers. The structure of flake boundaries greatly affects both the mechanical and electrical properties. The key factors are overlapping of the graphene flakes, their degree of mismatch and the presence of π type bonds. All of these issues should be taken into account when developing industrially scaled technologies for graphene manufacturing.
    W pracy przedstawiono wyniki badań mechanizmów wzrostu oraz wybranych właściwości mechanicznych i elektrycznych grafenu chemicznie osadzanego z fazy gazowej oraz grafenu metalurgicznego. Badania wykazały wpływ mechanizmów wzrostu na mono- i polikrystaliczne nanostruktury syntetyzowanych monowarstw grafenu. Struktura granic płatków grafenu znacząco wpływa zarówno na właściwości mechaniczne jak i elektryczne. Kluczowymi czynnikami są: nakładanie się płatków grafenu, stopień ich niedopasowania oraz obecność wiązań typu π. Wszystkie te aspekty powinny być brane pod uwagę przy opracowywaniu technologii produkcji grafenu na skalę przemysłową.
    Źródło:
    Archives of Metallurgy and Materials; 2015, 60, 4; 2535-2542
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of aluminium and magnesium on the corrosion resistance of zinc coatings
    Autorzy:
    Klimek, L.
    Waś-Solipiwo, J.
    Dybowski, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/102824.pdf
    Data publikacji:
    2017
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    hot-dip galvanizing
    Zn–Al-Mg coating
    corrosion resistance
    Opis:
    This article presents the research on corrosion resistance of Zn-Al-Mg coatings with varying aluminium and magnesium content. Aluminium and magnesium were added directly to the zinc bath at 10:1 rate. There was found more than sixfold increase in corrosion resistance of zinc coatings with aluminium content at the level of 4% of weight and magnesium content at the level of 0.4% of weight. In contrast to the amounts applied in the literature, such content of these alloy additives in the zinc bath limits to a significant extent the amount of intermetallic phases in zinc coatings obtained from such baths. This, in consequence, results in high resistance to corrosion with simultaneous retention of high plasticity of these coatings.
    Źródło:
    Advances in Science and Technology. Research Journal; 2017, 11, 2; 28-32
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    “Interactive Power Devices for Efficiency in Automotive with Increased Reliability and Safety” – the European Project Concerning the Main Automotive and Transport Application Domains
    Autorzy:
    Kadlec, J.
    Kuchta, R.
    Novotny, R.
    Hajduga, A.
    Sekrecki, M.
    Roszczyk, P.
    Dybowski, J.
    Kalbarczyk, J.
    Zieliński, W.
    Bańbura, P.
    Burliński, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/263013.pdf
    Data publikacji:
    2015
    Wydawca:
    Sieć Badawcza Łukasiewicz. Przemysłowy Instytut Motoryzacji
    Tematy:
    electric vehicle
    NAND flash memory
    reliability
    EV powertrain
    electric drive efficiency
    pojazd elektryczny
    pamięć flash NAND
    niezawodność
    napęd
    napęd elektryczny
    efektywność
    Opis:
    The overall objective of the IDEAS project is to develop advanced packaging for power supply components and new generation memory systems applicable to Electric and ICE propelled vehicles, with paying attention to considering also the aspects that have not been addressed yet in the running ENIAC and ARTEMIS Automotive projects. A major challenge related to electronic devices in the automotive applications is the reliability of power supply systems which must be capable to assure the functionality of subsystems in all operating conditions, inclusive of ageing. The control systems, which rely on multicore microcontrollers and complex software architectures, require increasingly stringent constraints from the memory devices which need to be designed for very high bandwidth, speed and reliability. In the following thesis, a few aspects of the IDEAS project will be presented: a review of important factors that affect the reliability and life-cycle endurance of NAND flash memories, multispeed gear application in electric drives and its influence on the energy efficiency. The problem of electromagnetic compatibility of electronic devices will also be dealt with in the paper
    Źródło:
    Archiwum Motoryzacji; 2015, 69, 3; 31-64
    1234-754X
    2084-476X
    Pojawia się w:
    Archiwum Motoryzacji
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Early Bashkirian Rugosa (Anthozoa) from the Donets Basin (Ukraine). Part 6. The Family Aulophyllidae Dybowski, 1873
    Autorzy:
    Fedorowski, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/139284.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Donets Basin
    Rugosa (Aulophyllidae)
    Bashkirian
    taxonomy
    phylogeny
    relationships
    Basen Doniecki
    Rugosa
    Baszkir
    taksonomia
    filogeneza
    relacje
    Opis:
    Seven genera (one new), belonging to four subfamilies, seven named species (six new), four species left in open nomenclature and two specimens included in this paper as unnamed Aulophyllidae are described from strata ranging from the lowermost Bashkirian Limestone D510 to the lower Bashkirian Limestone F1. A new genus: Voragoaxum and six new species: Dibunophyllum medium, Dibunophylloides columnatus, D. paulus, D. similis, Voragoaxum cavum and Rozkowskia lenta are introduced. Comparison of the ontogeny of the earliest Bashkirian species of Nina Fedorowski, 2017a and Dibunophylloides Fomichev, 1953 suggest the derivation by descent of the Family Bothrophyllidae from the Subfamily Dibunophyllinae. This means that true bothrophylla are absent in the Mississippian strata of the Western European Province and, perhaps, in the contemporaneous strata of other areas as well.
    Źródło:
    Acta Geologica Polonica; 2017, 67, 4; 459-514
    0001-5709
    Pojawia się w:
    Acta Geologica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Problems of practical diagnostics of induction machines in industry
    Autorzy:
    Dybowski, P.
    Rams, W.
    Rusek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1203942.pdf
    Data publikacji:
    2008
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie
    Tematy:
    current measurement
    diagnostic expert system
    induction machine
    squirrel-cage motor
    Opis:
    There are many problems in practical diagnostics of high-power, squirrel-cage induction machines, operated in industrial conditions. These problems make the diagnostics a difficult matter. The problems appear already at the stage of gathering diagnostic signals. The only practically accessible signals are the currents on secondary sides of current transformers monitoring supply currents of separate machines. Due to the proximity of other conductors, carrying high currents, these signals are sometimes accompanied by heavy background noise. The next stage of the diagnostic procedure is off-line analysis of registered signals referring to investigated objects. The main problem at this stage is proper interpretation of gotten results, especially in the cases where determination of the cage state, of investigated machines, is difficult due to ambiguity of diagnostic signals. The ambiguities and doubts by taking diagnostic decision result from that the diagnostic-like signal could be generated not only by cage damage but also by slightly asymmetrically manufactured rotor cage. In such difficult cases, the many-year diagnosing experience is the indispensable precondition for proper diagnostic verdict. The present paper includes some reports on case studies encountered during practical diagnoses of high power, 6kV induction machines, operated in real industrial conditions.
    Źródło:
    Electrical Power Quality and Utilisation. Journal; 2008, 14, 1; 79-84
    1896-4672
    Pojawia się w:
    Electrical Power Quality and Utilisation. Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Problemy praktycznej diagnostyki maszyn indukcyjnych w przemyśle
    Problems of practical diagnostics of induction machines in industry
    Autorzy:
    Dybowski, P.
    Rams, W.
    Rusek, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1374328.pdf
    Data publikacji:
    2007
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
    Tematy:
    maszyny indukcyjne
    diagnostyka maszyn indukcyjnych
    silnik indukcyjny
    Opis:
    There are many problems in practical diagnostics of machines operated in industrial conditions. Those problems make diagnostics difficult. They appear at the time of getting diagnostic signals ( accessibility of signals and disturbances). Next step is diagnostic analysis of registered signals for investigated objects. The main problem at this step is proper interpretation of gotten results, especially in the cases where determination of state of investigated objects is hard and ambiguous. The hardness and ambiguity can be expressed by a question, where the presence of diagnostic signal is caused by damage or by an asymmetrical construction of rotor cage? Using the experience acquired during measuring and analysis work the authors would like to report on practical diagnostics of induction machines in industrial conditions.
    Źródło:
    Maszyny Elektryczne: zeszyty problemowe; 2007, 76; 109-113
    0239-3646
    2084-5618
    Pojawia się w:
    Maszyny Elektryczne: zeszyty problemowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ustalenie przyczyny uszkodzenia silnika szeregowego prądu stałego w krótkim czasie eksploatacji po remoncie
    Causes of damage of the DC serial motor in a short time after it becomes operational
    Autorzy:
    Dybowski, P.
    Lerch, T.
    Rad, M.
    Skwarczyński, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/1199479.pdf
    Data publikacji:
    2017
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Napędów i Maszyn Elektrycznych Komel
    Tematy:
    maszyny elektryczne
    silnik szeregowy prądu stałego
    uszkodzenie
    izolacja uzwojeń
    electrical machines
    DC serial motor
    fault
    winding insulation
    Opis:
    The paper presents the causes of the commutator serial motor failure shortly after it becomes operational. The repair was made after long-term use in hard conditions of exploitation, requiring a large current overload. Knowledge of the causes of the failure should be a warning against reducing the scope of the repair work.
    W artykule przedstawiono przyczyny awarii silnika komutatorowego szeregowego wkrótce po przeprowadzonym remoncie. Remont ten został wykonany po długotrwałym okresie eksploatacji w ciężkich warunkach pracy, wymagających znacznych przeciążeń prądowych. Znajomość przyczyn awarii powinna być przestrogą przed ograniczaniem zakresu prac remontowych.
    Źródło:
    Maszyny Elektryczne: zeszyty problemowe; 2017, 2, 114; 85-88
    0239-3646
    2084-5618
    Pojawia się w:
    Maszyny Elektryczne: zeszyty problemowe
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of the Quenching Method on the Deformations Size of Gear Wheels after Vacuum Carburizing
    Autorzy:
    Dybowski, K.
    Sawicki, J.
    Kula, P.
    Atraszkiewicz, R.
    Lipa, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/352890.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    thermo-chemical treatment
    vacuum carburizing
    carburized layer
    quenching
    quenching deformations
    low-pressure carburizing
    Opis:
    This paper presents a comparison of the deformations and residual stresses in gear wheels after vacuum carburizing process with quenching in high-pressure nitrogen and oil. The comparison was made on a medium-sized gear wheels, made of AMS6265 (AISI 9310) steel. This steel is applied in the aerospace industry for gears. The study has provided grounds for an assessment of the effect of the method of quenching on the size of deformations. Compared to oil quenching, high-pressure gas quenching following vacuum carburizing resulted in more uniform and smaller deformations.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 2B; 1057-1062
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of the Chemical Composition on Electrical Conductivity and Mechanical Properties of the Hypoeutectic Al-Si-Mg Alloys
    Autorzy:
    Dybowski, B.
    Szymszal, J.
    Poloczek, Ł.
    Kiełbus, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/355890.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    hypoeutectic Al-Si-Mg alloys
    sand casting
    conductivity
    mechanical properties
    chemical composition
    Opis:
    Due to low density and good mechanical properties, aluminium alloys are widely applied in transportation industry. Moreover, they are characterized by the specific physical properties, such as high electrical conductivity. This led to application of the hypoeutectic Al-Si-Mg alloys in the power generation industry. Proper selection of the alloys chemical composition is an important stage in achievement of the demanded properties. The following paper presents results of the research on the influence of alloys chemical composition on their properties. It has been revealed that Si and Ti addition decreases electrical conductivity of the Al-Si-Mg alloys, while Na addition increases it. The mechanical properties of the investigated alloys are decreased by both silicon and iron presence. Sodium addition increases ductility of the Al-Si-Mg alloys.
    Źródło:
    Archives of Metallurgy and Materials; 2016, 61, 1; 353-360
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-11 z 11

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