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Wyszukujesz frazę "foundry processes" wg kryterium: Temat

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    Wyświetlanie 1-10 z 10
    Tytuł:
    Applications of monitoring of electric power parameters to performance evaluation of a model vacuum-assisted moulding installation
    Autorzy:
    Ziółkowski, E.
    Brzeziński, M.
    Wrona, R.
    Smyksy, K.
    Zyzak, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/382938.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    mechanizacja procesów odlewniczych
    automatyzacja procesów odlewniczych
    pomiar elektroenergetyczny
    formowanie podciśnieniowe
    mechanisation of foundry processes
    automation of foundry processes
    electric power measurements
    vacuum-assisted moulding processes
    Opis:
    Vacuum conditions in foundry installations are generated using electric-driven vacuum pumps. The purpose of the experiment is to evaluate the performance of a vacuum-assisted system for compaction of moulding sand basing on registered plots of selected electric power parameters of the power-supplying system of the pumps. Model testing done on an experimental vacuum system installation, power-supplied from a system incorporating the recorders of instantaneous current and voltage values. Following the numerical procedure, the experimental data are analysed to yield mathematical relationships between the variations of the generated vacuum pressure levels and variations of selected electric power parameters. Registered and computed values of selected parameters: instantaneous and RMS voltage and current values, active, reactive and apparent power levels and power coefficient allow for diagnosing the adequacy and reliability of the system operation. According to the authors, the applied monitoring of the power parameters of a vacuum-assisted installation may become an effective and easy practical method of evaluating the performance of such installations, used also in foundry plants.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 2; 267-272
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analysis and assessment of measurements results of electric power demand in a model vacuum-assisted moulding installation
    Autorzy:
    Smyksy, K.
    Wrona, R.
    Brzeziński, M.
    Ziółkowski, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/380436.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    mechanizacja procesów odlewniczych
    automatyzacja procesów odlewniczych
    pomiar elektroenergetyczny
    formowanie podciśnieniowe
    mechanisation of foundry processes
    automation of foundry processes
    electric power measurements
    vacuum assisted moulding processes
    Opis:
    In this article the main problems related with the proper choice of the design and operation parameters of vacuum installation in vacuum moulding system have been discussed. In such system a vacuum are generated using electric-driven vacuum pumps. The aim of the experiment is to evaluate the performance of a vacuum system basing on registered plots of selected electric power parameters of the power-supplying system of the pumps with parallel measurements instantaneous values of pressure in selected points of model stand. The measurements system for power-supply unit has incorporated the recorders of instantaneous current and voltage values. Following the suitable numerical procedure, the experimental data are analysed to yield mathematical relationships between the variations of the generated vacuum pressure levels and variations of selected electric power parameters. According to the authors, the applied measurements system of the parameters of a vacuum-assisted installation may become an effective and easy practical method of evaluating the performance of such installations, used also in industry.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 4; 135-140
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Some Similarities / Differences between Steel Static and Virtual Brass Static Casting
    Autorzy:
    Kwapisiński, P.
    Ivanova, A. A.
    Kania, B.
    Wołczyński, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/382343.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    procesy odlewnicze
    modelowanie matematyczne
    FCCT
    wlewek mosiężny
    foundry processes
    mathematical modeling
    brass static ingot
    Opis:
    An innovative method for determining the structural zones in the large static steel ingots has been described. It is based on the mathematical interpretation of some functions obtained due to simulation of temperature field and thermal gradient field for solidifying massive ingot. The method is associated with the extrema of an analyzed function and with its points of inflection. Particularly, the CET transformation is predicted as a time-consuming transition from the columnar- into equiaxed structure. The equations dealing with heat transfer balance for the continuous casting are presented and used for the simulation of temperature field in the solidifying virtual static brass ingot. The developed method for the prediction of structural zones formation is applied to determine these zones in the solidifying brass static ingot. Some differences / similarities between structure formation during solidification of the steel static ingot and virtual brass static ingot are studied. The developed method allows to predict the following structural zones: fine columnar grains zone, (FC), columnar grains zone, (C), equiaxed grains zone, (E). The FCCT-transformation and CET-transformation are forecast as sharp transitions of the analyzed structures. Similarities between steel static ingot morphology and that predicted for the virtual brass static ingot are described.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 1; 109-114
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Contribution to the Assessment of the Data Acquisition Effectiveness in the Aspect of Gas Porosity Defects Prediction in Ductile Cast Iron Castings
    Autorzy:
    Ignaszak, Z.
    Sika, R.
    Rogalewicz, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/381804.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    foundry processes
    information technology
    gas porosity
    data acquisition
    procesy odlewnicze
    technologie informatyczne
    porowatość gazowa
    akwizycja danych
    Opis:
    The article presents an example of analysis of the influence of selected parameters deriving from data acquisition in foundries on the occurrence of Gas porosity defects (detected by Visual testing) in castings of ductile cast iron. The possibilities as well as related effectiveness of prediction of this kind of defects were assessed. The need to rationally limit the number of possible parameters affecting this kind of porosity was indicated. Authors also benefited from expert group's expertise in evaluating possible causes associated with the creation of the aforementioned defect. A ranking of these parameters was created and their impact on the occurrence of the defect was determined. The classic statistical tools were used. The possibility of unexpected links between parameters in case of uncritical use of these typical statistical tools was indicated. It was emphasized also that the acquisition realized in production conditions must be subject to a specific procedure ordering chronology and frequency of data measurements as well improving the casting quality control. Failure to meet these conditions will significantly affect the difficulties in implementing and correcting analysis results, from which INput/OUTput data is expected to be the basis for modelling for quality control.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 1; 35-40
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Comparison of energy consumption in the classical (PID) and fuzzy control of foundry resistance furnace
    Autorzy:
    Ziółkowski, E.
    Śmierciak, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/380361.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    automatyzacja procesów odlewniczych
    piec odlewniczy
    regulator PID
    sterownik rozmyty
    automation of foundry processes
    control of foundry furnaces
    PID
    fuzzy controllers
    Opis:
    Foundry resistance furnaces are thermal devices with a relatively large time delay in their response to a change in power parameters. Commonly used in automation classical PID controllers do not meet the requirements of high-quality control. Developed in recent years, fuzzy control theory is increasingly being used in various branches of economy and industry. Fuzzy controllers allow to introduce new developments in control systems of foundry furnaces as well. Correctly selected fuzzy controller can significantly reduce energy consumption in a controlled thermal process of heating equipment. The article presents a comparison of energy consumption by control system of foundry resistance furnace, equipped with either a PID controller or fuzzy controller optimally chosen.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 3; 129-132
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Influence of vibrations during crystallization on mechanical properties and porosity of EN AC-AlSi17 alloy
    Autorzy:
    Ciućka, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/382352.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    fundamentals of foundry processes
    crystallization
    structural constituent
    porosity
    ATD
    proces odlewniczy
    krystalizacja
    składnik strukturalny
    porowatość
    metoda ATD
    Opis:
    Today’s industry aims at such situation, where number of defective products, so called defects shall approach to zero. Therefore, one introduces a various changes in technology of production, introduces improvements which would help in accomplishment of this objective. Another important factor is introduction of different type of testing, which shall help in assessment which factor has significant effect on quantity of rejects, and which one could be neglected. Existence of casting rejects is unavoidable; therefore a new ideas, technologies and innovations are necessary in the entire widely understood foundry branch, in order to minimize such adverse effect. Performance of tests aimed at unequivocal determination of an effect of vibrations during crystallization on mechanical properties and porosity of the EN AC-AlSi17 alloy was the objective of the present work. To do this, there were produced 36 castings from EN AC-AlSi17 alloy. All the castings underwent machining operations. Half of the casting was destined to strength tests, the other half served to determination of an effect of vibrations on porosity of the alloy. The specimens were divided into 12 groups, depending on amplitude of vibrations and tilt angle of metal mould during pouring operation.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 1; 5-8
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Role of the Structural and Thermal Peclet Numbers in the Brass Continuous Casting
    Autorzy:
    Kwapisiński, P.
    Lipnicki, Z.
    Ivanova, A. A.
    Wołczyński, W.
    Powiązania:
    https://bibliotekanauki.pl/articles/381666.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    foundry processes
    Growth Law
    continuous cast
    brass ingot
    structural zones
    procesy odlewnicze
    Prawo Wzrostu
    odlewanie ciągłe
    wlewek mosiężny
    strefy strukturalne
    Opis:
    The Structural Peclet Number has been estimated experimentally by analyzing the morphology of the continuously cast brass ingots. It allowed to adapt a proper development of the Ivantsov’s series in order to formulate the Growth Law for the columnar structure formation in the brass ingots solidified in stationary condition. Simultaneously, the Thermal Peclet Number together with the Biot, Stefan, and Fourier Numbers is used in the model describing the heat transfer connected with the so-called contact layer (air gap between an ingot and crystallizer). It lead to define the shape and position of the s/l interface in the brass ingot subjected to the vertical continuous displacement within the crystallizer (in gravity). Particularly, a comparison of the shape of the simulated s/l interface at the axis of the continuously cast brass ingot with the real shape revealed at the ingot axis is delivered. Structural zones in the continuously cast brass ingot are revealed: FC – fine columnar grains, C – columnar grains, E – equiaxed grains, SC – single crystal situated axially.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 2; 49-54
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Parameters of the two-phase sand-air stream in the blowing process
    Autorzy:
    Dańko, J.
    Dańko, R.
    Burbelko, A. A.
    Skrzyński, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/380343.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    rdzeń odlewniczy
    badania eksperymentalne
    obliczenia symulacyjne
    foundry cores
    blowing processes
    shooting processes
    experimental investigations
    simulation calculations
    Opis:
    Theoretical problems concerning the determination of work parameters of the two-phase sand-air stream in the cores making process by blowing methods as well as experimental methods of determination of the main and auxiliary parameters of this process decisive on the cores quality assessed by the value and distribution of their apparent density are presented in the paper. In addition the results of visualisations of the core-box filling with the sand-air stream, from the blowing chamber, obtained by the process filming by means of the quick-action camera are presented in the paper and compared with the results of simulation calculations with the application of the ProCast software.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 4; 25-30
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Core Blowing Process - Assessment of Core Sands Properties and Preliminary Model Testing
    Autorzy:
    Dańko, R.
    Dańko, J.
    Burbelko, A.
    Skrzyński, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/380188.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    foundry cores
    blowing processes
    shooting processes
    experimental investigations
    simulation calculations
    rdzenie odlewnicze
    wstrzeliwanie
    proces szybkiego łączenia
    badania eksperymentalne
    obliczenia symulacyjne
    Opis:
    The effects of filling the core box cavity and sand compaction in processes of core production by blowing methods (blowing, shooting) depend on several main factors. The most important are: geometrical parameters of cavity and complexity of its shape, number, distribution and shape of blowing holes feeding sands as well as the venting of a technological cavity. Values of individual parameters are selected according to various criteria, but mostly they should be adjusted to properties of the applied core sand. Various methods developed by several researchers, including the authors own attempts, allow to assess core sands properties on the basis of special technological tests projecting the process into a laboratory scale. The developed criteria defining a degree or a filling ability factor provide a better possibility of assessing the core sand behaviour during flowing and core box filling, which indicate the value and structure of the obtained compacting decisive – after hardening – for strength and permeability. The mentioned above aspects are analysed – on the basis of authors’ own examinations - in the hereby paper.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 1; 25-28
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on Accuracy of Automatic System for Casting Measuring
    Autorzy:
    Jaworski, J.
    Kluz, R
    Trzepieciński, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/381307.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    automation in foundry
    robotics in foundry
    product development
    mechanization of casting processes
    automation of casting processes
    quality control of castings
    measurement systems
    automatyzacja w odlewni
    robotyka w odlewni
    rozwój produktów
    mechanizacja procesów odlewniczych
    automatyzacja procesów odlewniczych
    kontrola jakości odlewów
    systemy pomiarowe
    Opis:
    Ensuring the required quality of castings is an important part of the production process. The quality control should be carried out in a fast and accurate way. These requirements can be met by the use of an optical measuring system installed on the arm of an industrial robot. In the article a methodology for assessing the quality of robotic measurement system to control certain feature of the casting, based on the analysis of repeatability and reproducibility is presented. It was shown that industrial robots equipped with optical measuring systems have the accuracy allowing their use in the process of dimensional control of castings manufactured by lost-wax process, permanent-mould casting, and pressure die-casting.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 3; 49-54
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-10 z 10

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