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    Tytuł:
    Analysis of the Possibility of Calculating the Charges on the Example of Brasses
    Autorzy:
    Biernat, S.
    Bydałek, A. W.
    Wołczyński, W.
    Najman, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/356905.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    quality management castings
    alloy
    brass
    calculating
    batch
    Opis:
    This paper describes the subject of brasses and the method of their production from the secondary raw materials. It focuses on two very important aspects extremely important for today’s world. The first of them is the theme of rational management of materials, particularly metallic scrap. The second issue is the growing importance of products made of brass, which in recent times get also special recognition in medicine. This article presents a proposal for a methodology for calculating the metal charge for brasses of two or more components. It turns out that by using suitable mathematical calculations one can accurately determine the amount of metal charge to obtain a product having the desired chemical composition and desired mechanical properties. Mathematical calculations are also presented in the graphical form for the visualization of dependency and a better explanation of the accepted approach.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 4; 2165-2170
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Application of I / MR and CUSUM Control Charts to Evaluate the Quality of Cast Steel in Induction Furnaces
    Autorzy:
    Brzeziński, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/354232.pdf
    Data publikacji:
    2018
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    cast steel
    quality management of castings
    Statistic Process Controlings
    control charts
    Opis:
    This article is a result of research carried out in foundry casting steel castings for the railway industry. The smelting process (smelting) in induction furnaces, in terms of the compatibility of the actual chemical elements in the metal with the composition laid down in the technological instructions, was included in the study program. In practice, the actual content of elements is determined by the static spectral analysis method and recorded in the documentation created by the traditional record. Entries are evaluated only in terms of compliance with technological instructions, which does not translate into improvement in the quality of the melt as a function of the duration of the production process. The introduction of time analysis in the melting range allows to take into account the variability of a number of factors affecting the actual (final) content of the elements and thus the quality of the cast. An example of time analysis presented in the article is the ability to use I / MR control cards for individual (single) observations composed of smelting processes and CUSUM cards that enable the detection of factor variability based on cumulative sums. Cards of this type can be helpful in achieving the quality of alloys in real time of the melting process.
    Źródło:
    Archives of Metallurgy and Materials; 2018, 63, 1; 99-104
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Karty kontrolne narzędziem oceny zmienności procesu wytwarzania odlewów
    Control Charts as the Tool for Assessment of the Variability of the Castings Manufacturing Process
    Autorzy:
    Brzeziński, M.
    Smyksy, K.
    Powiązania:
    https://bibliotekanauki.pl/articles/381184.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    odlewy
    zarządzanie jakością
    system MSA
    karty kontrolne
    castings
    quality management
    MSA system
    checklists
    Opis:
    Szybko rozwijająca się gospodarka oraz ciągłe wzrastające wymagania klientów wymuszają na odlewniach nieustanną rywalizację o egzystencję i dalszy rozwój. Osiągnięcie tych dwóch podstawowych rzeczy, jest sprawą niezmiernie trudną. Zarząd odlewni staje przed skomplikowanymi decyzjami związanymi z maksymalizacją efektywności produkcji. Do takich decyzji należy m.in. wdrażanie nowych systemów czy też instrumentów zarządzania jakością. W artykule poddano analizie i ocenie system kontroli jakości odlewów oparty na kartach kontrolnych do pomiarów liczbowych [...].
    Rapidly growing economy and the continuous increasing demands of customers force on foundry companies the ceaseless rivalry for existence and further development. Achieving these two basic aims is extremely difficult matter. Management of foundry is faced with complicated decisions connected with maximization of the production effectiveness. Such decisions include, among others, implementation of new systems or instruments of the quality management. The article analyzes and evaluates the quality control system of casting based on control charts of measurements [...]
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 2 spec.; 7-10
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Effect of the Return Material Implementation into the Production of Silumin Casts on Technological and Economic Indicators of Production Process
    Autorzy:
    Gaspar, S.
    Majernik, J.
    Trytek, A.
    Podaril, M.
    Benova, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/2126917.pdf
    Data publikacji:
    2022
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    HPDC
    product development
    quality management
    mechanical properties
    castings defects
    rozwój produktu
    zarządzanie jakością
    właściwości mechaniczne
    wady odlewów
    Opis:
    The production of high pressure die casts also brings difficulties regarding the processing of the waste material. It is mainly formed by runners, overflows and other foundry supplements used and, in the case of machines using the cold chamber, also the remainder from this chamber. As this material is often returned to the production process, we refer to it as return material. In the production process, it is therefore essential to deal with the proportion issue of return material against primary material that can be added to the melt to maintain the required cast properties. The submitted article monitors the quality properties of the alloy, selected mechanical properties of casts and porosity depending on the proportion of the return material in the melt. At the same time, the material savings are evaluated with regards to the amount of waste and the economic burden of the foundries. To monitor the above-mentioned factors, series of casts were produced from the seven melting process variants with a variable ratio of return to the primary material. The proportion ratio of return material in the primary alloy was adjusted from 100% of the primary alloy to 100% of the return material in the melting process. It has been proven that with the increasing proportion of the return material, the chemical composition of the melt changes, the mechanical properties of the alloy decrease and the porosity of the casts increases. Based on the results of the tests and analyzes, the optimal ratio of return and primary material in the melting process has been determined. Considering the prescribed quality of the alloy and mechanical properties, concerning the economic indicator of the savings, the ratio is set at 70:30 [%] in favor of the primary material.
    Źródło:
    Archives of Foundry Engineering; 2022, 22, 1; 69--76
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Use of Abrasive Waterjet Cutting to Remove Flash from Castings
    Autorzy:
    Bańkowski, D.
    Spadło, S.
    Powiązania:
    https://bibliotekanauki.pl/articles/380980.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    surface treatment
    quality management
    automation in foundry
    robotics in foundry
    abrasive water jet cutting
    castings
    obróbka powierzchniowa
    zarządzanie jakością
    automatyzacja w odlewni
    robotyka w odlewni
    cięcie strumieniem wody
    odlewy
    Opis:
    This article proposes to use abrasive waterjet cutting (AWJ) for deflashing, deburring and similar finishing operations in casting. The basic requirements concerning the dimensional accuracy and surface texture of cast components are not met if visible surface flaws are detected. The experiments focused on the removal of external flash from elements made of EN-GJL-150 cast iron. The method employed for finishing was abrasive waterjet cutting. The tests were carried out using an APW 2010BB waterjet cutting machine. The form profiles before and after flash removal were determined with a Taylor Hobson PGI 1200 contact profiler. A Nikon AZ100 optical microscope was applied to observe and measure the changes in the flash height and width. The casting surface after finishing was smooth, without characteristic sharp, rough edges that occur in the cutting of objects with a considerable thickness. It should be emphasized that this method does not replace precise cutting operations. Yet, it can be successfully used to finish castings for which lower surface quality is required. An undoubted advantage of waterjet cutting is no effect of high temperature as is the case with plasma, laser or conventional cutting. This process is also easy to automate; one tool is needed to perform different finishing operations in order to obtain the desired dimensions, both internal and external.
    Źródło:
    Archives of Foundry Engineering; 2019, 3; 94-98
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-5 z 5

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