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    Wyświetlanie 1-12 z 12
    Tytuł:
    Wpływ nierównomierności temperatury materiału wyjściowego na parametry procesu kucia
    Stock temperature non-uniformity influence on forging process parameters
    Autorzy:
    Bednarek, S.
    Łukaszek-Sołek, A.
    Chyła, P.
    Sińczak, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/212135.pdf
    Data publikacji:
    2010
    Wydawca:
    Sieć Badawcza Łukasiewicz - Instytut Obróbki Plastycznej
    Tematy:
    materiał wyjściowy
    temperatura
    kucie w matrycach otwartych
    modelowanie numeryczne
    stock
    temperature
    half die forging
    numerical modelling
    Opis:
    W przeprowadzonych badaniach analizowano proces kucia tulejki z kołnierzem. Badania obejmowały zagadnienia nierównomierności temperatury materiału wyjściowego, która może wystąpić w praktyce przemysłowej i jej wpływ na parametry siłowe procesu kucia oraz na rozkład odkształceń i napręSeń w gotowej odkuwce.
    In this paper the forging process of bush with flange was analysed. The aim of this work was to pay attention to stock temperature non-uniformity problem, which may occurs in industrial practice and it’s influence on force parameters of forging process and strain and stresses distribution in final product.
    Źródło:
    Obróbka Plastyczna Metali; 2010, 21, 1; 3-12
    0867-2628
    Pojawia się w:
    Obróbka Plastyczna Metali
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Homogenity of die casting and returning material
    Autorzy:
    Malik, J.
    Vasková, I.
    Fecko, D.
    Futáš, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/382774.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    krystalizacja
    innowacyjne technologie odlewnicze
    innowacyjne materiały odlewnicze
    odlewanie ciśnieniowe
    maszyna ciśnieniowa
    theory of crystallization
    innovative foundry technologies
    innovative foundry material
    die casting
    die casting machine
    returning material
    Opis:
    Homogeneity of die castings is influenced by wide range of technological parameters as piston velocity in filling chamber of die casting machine, filling time of mould cavity, temperature of cast alloy, temperature of the mould, temperature of filling chamber, surface pressure on alloy during mould filling, final pressure and others. Based on stated parameters it is clear, that main parameters of die casting are filling time of die mould cavity and velocity of the melt in the ingates. Filling time must ensure the complete filling of the mould cavity before solidification process can negatively influence it. Among technological parameters also belong the returning material, which ratio in charge must be constrained according to requirement on final homogeneity of die castings. With the ratio of returning material influenced are the mechanical properties of castings, innerhomogeneity and chemical composition.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 2; 61-64
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure of water mist stream and its impact on cooling efficiency of casting die
    Autorzy:
    Władysiak, R.
    Budzyński, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/382910.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innowacyjne technologie odlewnicze
    innowacyjne materiały odlewnicze
    odlewanie kokilowe
    mgła wodna
    mikrostruktura
    strumień ciepła
    innovative foundry technologies
    innovative foundry material
    casting die cooling
    water mist
    microstructure
    heat flux
    Opis:
    The work is a continuation of research on the use water mist cooling in order to increase efficiency of die-casting aluminum alloys. The paper presents results of research and analysis process, spraying water and generated a stream of water mist, the effect of the type of nozzle, the nozzle size and shape of the emitting of the water mist on the wall surface of casting die on the microstructure and geometry of water mist stream and cooling efficiency. Tests were used to perform high-speed camera to record video in the visible and infrared camera. Results were used to develop a computerized image analysis and statistical analysis. The study showed that there are statistical relationships between water and air flow and geometry of the nozzle and nozzle emitting a stream of microstructure parameters of water mist and heat the incoming stream. These relationships are described mathematical models that allow you to control the generating of adequate stream of water mist and a further consequence, the cooling efficiency of casting die.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 2; 251-260
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The decreasing of die cracking for HDPC technology by changing parameters of heat treatment
    Autorzy:
    Herman, A.
    Zikmund, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/380274.pdf
    Data publikacji:
    2012
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    metalografia
    obróbka cieplna
    właściwości mechaniczne
    odlewanie ciśnieniowe
    metallography
    heat treatment
    mechanical properties
    die material
    HPDC technology
    Opis:
    In earlier works were described trends in the production of tools for die casting (hot work). Almost the entire set of issues dealt with may seem insignificant when incompletely assembled acceptance of the material and the associated risks of processing a material with an inappropriate structure, leading to a very early defect of the die. Therefore, further work will focus particularly on identifying the causes of thermal cracks and preventing a suitable choice of acceptance criteria conditions and heat treatment.
    Źródło:
    Archives of Foundry Engineering; 2012, 12, 3; 49-52
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Development of a New Tool Material for High Pressure Die Casting
    Autorzy:
    Herman, A.
    Zikmund, P.
    Tatíček, F.
    Powiązania:
    https://bibliotekanauki.pl/articles/382710.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    metallography
    die material
    HPDC technology
    wear resistant alloy
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    metalografia
    odlewanie ciśnieniowe
    stop odporny na ścieranie
    Opis:
    The paper describes existing requirements for tool materials. In the light of experience with these supplied materials, we have demonstrated their considerable influence on the life of molds for die casting technology. From this research came the evaluation methodology of these tool materials which has been used for directing the development of a new material. Based on the new regulation of the chemical composition a sample was casted and forged after that. Then was determined the process of heat treatment and from a block of this material a mold insert was produced. This insert is now being tested in production.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 2; 23-28
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Structure of AlSi20 Alloy in Heat Treated Die Casting
    Autorzy:
    Władysiak, R.
    Kozuń, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/382310.pdf
    Data publikacji:
    2015
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    die casting
    water mist cooling
    hypereutectic silumin
    microstructure
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    odlewanie ciśnieniowe
    chłodzenie mgłą wodną
    silumin nadeutektyczny
    mikrostruktura
    Opis:
    The work is a continuation of research on the use of water mist cooling in order to increase efficiency of die-casting aluminum alloys using multipoint water mist cooling system. The paper presents results of investigation on crystallization process and microstructure of synthetic hypereutectic AlSi20 alloy. Casts were made in permanent mold cooled a with water mist stream. The study was conducted for unmodified AlSi20 alloy and a modified one with phosphorus, titanium and boron on the research station allowing sequential multipoint cooling using a dedicated program of computer control. The study demonstrated that the use of mold cooled with water mist stream and solution heat treatment allows in wide range for the formation of the microstructure of hypereutectic silumins. It leads to the growth of microstructure refinement and spheroidizing of phases in the casting.
    Źródło:
    Archives of Foundry Engineering; 2015, 15, 1; 113-118
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    An Assessment of Appropriateness of the Choice of Parameters for Refractory Stampings Fabrication Process
    Autorzy:
    Orłowicz, A. W.
    Mróz, M.
    Tupaj, M.
    Trytek, A.
    Kupiec, B.
    Korzeniowski, M.
    Pająk, D.
    Sondej, K.
    Kozak, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/382313.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    die stamping
    refractory materials
    metal die
    material density
    tłoczenie
    materiały ogniotrwałe
    matryca
    gęstość
    Opis:
    The paper presents results of an analysis of material density distribution in stampings press-moulded in metal dies from raw refractory materials based on alumina-magnesia-carbon aggregate. The stampings, fabricated on LAEIS HPF 1250 pressing machine, are blanks from which refractory precast shapes are manufactured by means of drying and firing. Samples for material density evaluation were cut out from test stampings with the use of diamond-reinforced disc. Density of the material was determined in thirteen layers of stampings denoted with letters A through M.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 2; 55-60
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of Unit Pressure Force in Material Volume in the Course of Refractory Stamping Press Moulding
    Autorzy:
    Orłowicz, A. W.
    Mróz, M.
    Cisek, Z.
    Tupaj, M.
    Trytek, A.
    Kupiec, B.
    Korzeniowski, M.
    Sondej, K.
    Kozak, L.
    Powiązania:
    https://bibliotekanauki.pl/articles/382282.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    die stamping
    refractory materials
    metal die
    material density
    tłoczenie
    materiały ogniotrwałe
    matryca
    gęstość
    Opis:
    The paper presents results of assessment of the unit pressure force within the refractory material volume in the course press-moulding of stampings for refractory precast shapes. The force was evaluated with the use of physical simulation of deformation undergone by lead balls placed in the raw refractory mass subjected to pressing in a metal die. To determine the value of unit pressure force applied to the aggregate grains in the course of stamping press-moulding, physical model of deformation of a sphere induced by the uniaxial stress state was used.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 2; 61-68
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Casting Die Cooling on Solidification Process and Microstructure of Hypereutectic Al-Si Alloy
    Autorzy:
    Władysiak, R.
    Kozuń, A.
    Pacyniak, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/380676.pdf
    Data publikacji:
    2016
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    casting die cooling
    water mist
    hypereutectic silumin
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    odlewanie kokilowe
    mgła wodna
    silumin nadeutektyczny
    Opis:
    The work is a continuation of research concerning the influence of intensive cooling of permanent mold in order to increase the casting efficiency of aluminium alloys using the multipoint water mist cooling system. The paper presents results of investigation of crystallization process and microstructure of synthetic hypereutectic alloys: AlSi15 and AlSi19. Casts were made in permanent mold cooled with water mist stream. The study was conducted for unmodified silumins on the research station allowing the cooling of the special permanent probe using a program of computer control. Furthermore the study used a thermal imaging camera to analyze the solidification process of hypereutectic silumins. The study demonstrated that the use of mold cooled with water mist stream allows in wide range the formation of the microstructure of hypereutectic silumins. It leads to higher homogeneity of microstructure and refinement of crystallizing phases and also it increases subsequently the mechanical properties of casting.
    Źródło:
    Archives of Foundry Engineering; 2016, 16, 4; 175-180
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Analiza i opracowanie efektywnego sposobu wstępnego nagrzewania narzędzi do kucia na gorąco
    Autorzy:
    Widomski, P.
    Skwarski, M.
    Rychlik, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/1189982.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    narzędzia kuźnicze
    matryca kuźnicza
    wkładka matrycowa
    materiał wsadowy
    preheating
    forging die
    tempering
    billet
    Opis:
    This article contains an overview of available preheating methods which are commonly used in hot forging processes. Then a comprehensive analysis of the temperature changes that occur on the surface and directly below the surface of the forging die was carried out during the preheating process. The temperature measurement was performed with fast thermal camera and a thermocouple inserted inside the tool. The temperature was measured in traditional preheating process, and its value after preheating was about 200ºC, which can be acceptable, however this process was improper, because of possibility of tempering surface layer of forging tool. That’s why new method of preheating tools in contact with heated billets was developed and detailed instructions for time and layout of billets were prepared. The tool temperature was measured also after application of new method presented in this manuscript, and it reached over 200ºC after two preheating cycles. After three cycles of preheating also good results obtained because temperature in surface layer was about 260ºC. In conclusion, method proposed by authors obtained good result, is quite efficient and prevents from tempering of forging tools. Finally, two pre-heating instructions were prepared, for the Massey 2500T press and the Massey 1300T press, which are attached at the end of the manuscript.
    Źródło:
    Interdisciplinary Journal of Engineering Sciences; 2017, 5, 1; 27--32
    2300-5874
    Pojawia się w:
    Interdisciplinary Journal of Engineering Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Experimental Investigations on the Ejector Forces in the Die Casting Process
    Autorzy:
    Krischke, S.
    Müller, S.
    Schuchardt, T.
    Kouki, Y.
    Dilger, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/382411.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    innovative foundry technology
    innovative foundry material
    information technology
    foundry industry
    high pressure die casting
    ejector force
    innowacyjna technologia odlewnicza
    innowacyjny materiał odlewniczy
    technologia informatyczna
    przemysł odlewniczy
    odlewanie wysokociśnieniowe
    Opis:
    A measuring system was developed for the measurement of ejector forces in the die casting process. When selecting the sensor technology, particular care was taken to ensure that measurements can be taken with a high sampling rate so that the fast-running ejection process can be recorded. For this reason, the system uses piezoelectric force sensors which measure the forces directly at the individual ejector pins. In this way, depending on the number of sensors, it is possible to determine both the individual ejector forces and the total ejector force. The system is expandable and adaptable with regard to the number and position of the sensors and can also be applied to real HPDC components. Automatic triggering of the measurements is also possible. In addition to the measuring system, a device and a method for in-situ calibration of the sensors have also been developed. To test the measuring system, casting experiments were carried out with a real aluminium HPDC aluminium component. The experiments showed that it is possible to measure the ejector forces with sufficient sampling rate and also to observe the process steps of filling, intensification and die opening by means of ejector forces. Experimental setup serves as a basis for future investigations regarding the influencing parameters on the ejection process.
    Źródło:
    Archives of Foundry Engineering; 2018, 18, 4; 116-119
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Study of Microstructure and Porosity Formation in High-Pressure Die-Casting
    Autorzy:
    Matejka, Marek
    Bolibruchová, D.
    Podprocká, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2126896.pdf
    Data publikacji:
    2021
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Al-Si-Cu alloy
    high-pressure die casting
    returnable material
    numerical simulation
    porosity
    microstructure
    stop Al-Si-Cu
    odlewanie wysokociśnieniowe
    odzysk materiału
    symulacja numeryczna
    porowatość
    mikrostruktura
    Opis:
    The technology of high-pressure die-casting (HPDC) of aluminum alloys is one of the most used and most economical technology for mass production of castings. High-pressure die-casting technology is characterized by the production of complex, thin-walled and dimensionally accurate castings. An important role is placed on the effective reduction of costs in the production process, wherein the combination with the technology of high-pressure die-casting is the possibility of recycling using returnable material. The experimental part of the paper focuses on the analysis of a gradual increase of the returnable material amount in combination with a commercial purity alloy for the production of high-pressure die-castings. The returnable material consisted of the so-called foundry waste (defective castings, venting and gating systems, etc.). The first step of the experimental castings evaluation consisted of numerical simulations, performed to determine the points of the casting, where porosity occurs. In the next step, the evaluation of areal porosity and microstructural analysis was performed on experimental castings with different amounts of returnable material in the batch. The evaluation of the area porosity showed only a small effect of the increased amount of the returnable material in the batch, where the worst results were obtained by the casting of the alloy with 90% but also with 55% of the returnable material in the batch. The microstructure analysis showed that the increase in returnable material in the batch was visibly manifested only by a change in the morphology of the eutectic Si.
    Źródło:
    Archives of Foundry Engineering; 2021, 21, 4; 127--130
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-12 z 12

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