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    Wyświetlanie 1-4 z 4
    Tytuł:
    New Use of Instruments for More Accurate Wax Pattern Blade Segment Production
    Autorzy:
    Herman, A.
    Kubelková, I.
    Vrátný, O.
    Powiązania:
    https://bibliotekanauki.pl/articles/381106.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    foundry industry
    application of information technology
    innovative foundry technologies
    innovative materials
    Investment casting
    gas turbines
    infrared thermography
    simulation
    przemysł odlewniczy
    zastosowanie technologii informatycznej
    innowacyjne technologie odlewnicze
    innowacyjne materiały
    turbiny gazowe
    symulacja
    Opis:
    Precision casting is currently motivated by high demand especially for castings for the aerospace, automotive and gas turbine industries. High demands on precision of this parts pressure foundries to search for the new tools which can help them to improve the production. One of these tools is the numerical simulation of injection process, whereas such software especially for investment casting wax injection, process does not exist yet and for this case must be the existing software, for alloys or plastic, modified. This paper focuses on the use of numerical simulations to predict the behavior of injected models of gas turbine blades segments. The properties of wax mixtures, which were imported into the Cadmould simulation software as a material model, were found. The results of the simulations were verified using the results of 3D scanning measurements of wax models. As a supporting technology for verifying the results was used the Infrared Thermography.
    Źródło:
    Archives of Foundry Engineering; 2019, 2; 101-106
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improving Quality and Occupational Safety on Automated Casting Lines
    Autorzy:
    Kukla, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/380123.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    foundry industry
    quality management
    automation in foundry
    application of information technology
    modelling of production systems
    simulation of production systems
    work ergonomics
    przemysł odlewniczy
    zarządzanie jakością
    automatyzacja w odlewni
    zastosowanie technologii informatycznych
    modelowanie systemów produkcyjnych
    symulacja systemów produkcyjnych
    ergonomia pracy
    Opis:
    The paper presents a practical example of improving quality and occupational safety on automated casting lines. Working conditions on the line of box moulding with horizontal mould split were analysed due to low degree of automation at the stage of cores or filters installation as well as spheroidizing mortar dosing. A simulation analysis was carried out, which was related to the grounds of introducing an automatic mortar dispenser to the mould. To carry out the research, a simulation model of a line in universal Arena software for modelling and simulation of manufacturing systems by Rockwell Software Inc. was created. A simulation experiment was carried out on a model in order to determine basic parameters of the working system. Organization and working conditions in other sections of the line were also analysed, paying particular attention to quality, ergonomics and occupational safety. Ergonomics analysis was carried out on manual cores installation workplace and filters installation workplace, and changes to these workplaces were suggested in order to eliminate actions being unnecessary and onerous for employees.
    Źródło:
    Archives of Foundry Engineering; 2017, 17, 3; 69-72
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Shrinkage Porosity Criterion and Its Application to A 5.5 Ton Steel Ingot
    Autorzy:
    Zhang, C.
    Bao, Y.
    Wang, M.
    Zhang, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/382021.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    foundry industry
    quality management
    shrinkage porosity
    ingot solidification
    application of information technology
    numerical simulation
    przemysł odlewniczy
    zarządzanie jakością
    porowatość
    krzepnięcie
    zastosowanie technologii informatycznych
    symulacja numeryczna
    Opis:
    In order to predict the distribution of shrinkage porosity in steel ingot efficiently and accurately, a criterion R√L and a method to obtain its threshold value were proposed. The criterion R√L was derived based on the solidification characteristics of steel ingot and pressure gradient in the mushy zone, in which the physical properties, the thermal parameters, the structure of the mushy zone and the secondary dendrite arm spacing were all taken into consideration. The threshold value of the criterion R√L was obtained with combination of numerical simulation of ingot solidification and total solidification shrinkage rate. Prediction of the shrinkage porosity in a 5.5 ton ingot of 2Cr13 steel with criterion R√L>0.21 m･℃1/2･s-3/2 agreed well with the results of experimental sectioning. Based on this criterion, optimization of the ingot was carried out by decreasing the height-to-diameter ratio and increasing the taper, which successfully eliminated the centreline porosity and further proved the applicability of this criterion.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 2; 27-32
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Modelling and Optimization of Organization of Workplaces in a Foundry
    Autorzy:
    Kukla, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/380728.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    application of information technology
    foundry industry
    automation in foundries
    robotics in foundries
    equipment effectiveness
    modelling of production systems
    simulation of production systems
    work ergonomics
    zastosowanie technologii informatycznych
    przemysł odlewniczy
    automatyzacja odlewni
    robotyka w odlewniach
    skuteczność urządzeń
    modelowanie systemów produkcyjnych
    symulacja systemów produkcyjnych
    ergonomia pracy
    Opis:
    The paper presents a practical example of improvement of foundry production systems in terms of post-finishing of nodular iron castings produced in the conditions of bulk production for automotive industry. The attention was paid to high labour-intensive efforts, which are difficult to be subjected to mechanization and automation. The times of actions related to grinding processing of castings in three grinding positions connected with a belt conveyor were estimated with the use of a time study method. A bottleneck as well as limiting factors were specified in a system. A number of improvements were proposed, aimed at improving work organization on the castings post-finishing line. An analysis of work ergonomics at the workplace was made in order to eliminate unnecessary and onerous for the employee actions. A model of production system using the Arena software, on which a simulation experiment was conducted, was drawn up in order to visualize the analysed phenomena. The effects of the project were shown on graphs comparing times, costs, work ergonomics and overall efficiency of production equipment indicator.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 3; 55-58
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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