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    Wyświetlanie 1-7 z 7
    Tytuł:
    Prediction of the shape accuracy of parts fabricated by means of FLM process using FEM simulations
    Autorzy:
    Möhring, H.-Christian
    Stehle, Thomas
    Maucher, Clemens
    Becker, Dina
    Braun, Steffen
    Powiązania:
    https://bibliotekanauki.pl/articles/99674.pdf
    Data publikacji:
    2019
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    additive manufacturing
    FLM-simulation
    shape accuracy
    Opis:
    The prediction of component properties from the Additive manufacturing (AM) process poses a challenge. Therefore, this paper presents the development of a novel machine data (G-Code) based procedure as well as its programming implementation of a process simulation in ANSYS Mechanical for the fused layer modelling (FLM) process. For this purpose, an investigation of additively produced components with varying parameters made of polylactic acid (PLA) is carried out and simulated by means of the developed method. Application of the developed method makes it possible to predict the thermally induced distortion of PLA-Parts based on the machine data from the FLM process before production.
    Źródło:
    Journal of Machine Engineering; 2019, 19, 1; 114-127
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of the shape accuracy of cylindrical holes machined by EDM process
    Autorzy:
    Spadło, S.
    Dudek, D.
    Powiązania:
    https://bibliotekanauki.pl/articles/99888.pdf
    Data publikacji:
    2012
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    electrical discharge machining
    hole drilling
    shape accuracy
    Opis:
    The paper deals with the investigations of influence parameters of electrodischarge machining (EDM) on the shape accuracy of holes machined by EDM process. BP-95. machine with electronic generator type was used to perform EDM process. Kerosene was used as a dielectric. During EDM process the parameters of current were permanent. The shape of electrode and way of passing dielectric were changed. The following parameters were determined: productivity of EDM process and shape accuracy of the drilling holes. The accuracy of bored cylindrical holes, is highest in case of hollowing out with the tubular electrode and for sucking out working liquid by her inner life. In the case of hollowing out with the electrode tubular, sinking the tube with pumping liquid by the inner life is the most favourable method causing the smallest mistakes of outlines of the cylindrically shape. The time of boring the arterial hole is shortest in case of hollowing out with the electrode tubular and for pumping working liquid by inside.
    Źródło:
    Journal of Machine Engineering; 2012, 12, 2; 98-104
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of increased temperature on dimensional and shape accuracy of castings produced from the EN AC-AlSi11 alloy by pressure die casting process
    Autorzy:
    Jarco, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/353899.pdf
    Data publikacji:
    2019
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    high pressure die casting
    Al-Si alloy
    blistering
    dimensional accuracy
    shape accuracy
    elevated temperature behavior
    Opis:
    The present work discusses results of increased temperature on shape-dimensional changes of a 110 type hose coupling, produced from EN AC-AlSi11 alloy with the use of pressure die casting technology. The castings were soaked for 3.5 h at temperatures 460°C, 475°C and 490°C. The verification of shape-dimensional accuracy of the elements after soaking treatment, in relation to raw casting, was carried out by comparing the 3D models received from 3D scanning. Soaking temperature of about 460°C-475°C results in no significant changes in the shapes and dimensions of the castings, or surface defects in the form of blisters, which can be seen at a temperature of 490°C.
    Źródło:
    Archives of Metallurgy and Materials; 2019, 64, 1; 325-328
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Dimensional-Shape Verification of a Selected Part of Machines Manufactured by Additive Techniques
    Autorzy:
    Bernaczek, Jacek
    Budzik, Grzegorz
    Dziubek, Tomasz
    Przeszłowski, Łukasz
    Wójciak, Kinga
    Powiązania:
    https://bibliotekanauki.pl/articles/2201895.pdf
    Data publikacji:
    2023
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    dimensional accuracy
    shape accuracy
    coordinate measurements
    3D scanning
    additive manufacturing
    FFF technology
    PolyJet technology
    Opis:
    The publication covers the complex process of analyzing the accuracy of mapping models produced in AM (Additive Manufacturing) processes with a thermoplastic material – FFF (Fused Filament Fabrication) and polymerization of light-curing resin – PolyJet. The research was conducted with the use of an advanced optical measuring system – the GOM Atos 3D scanner. The part selected for the research in question was the water pump body as a representative example of an element with adequate dimensional and shape conditions (high degree of folding and geometric differentiation) allowing, based on the results of coordinate measurements determined in the research process, to define the potential area of application of AM models made of thermoplastic material and resin hardened with UV light. The performed tests showed the accuracy of individual AM methods at a level within the range declared by machine manufacturers. However, the PolyJet body is characterized by a much higher accuracy of the shape mapping compared to the FFF body. The dimensional accuracy is also higher for the resin model in relation to the thermoplastic model, which results primarily from the thickness of the elementary layer of the model material applied by the printing module defined for individual incremental processes – 16 μm for RGD 720 and 0.2 mm for ABS. Detailed elaboration and analysis of the research results are presented in this publication.
    Źródło:
    Advances in Science and Technology. Research Journal; 2023, 17, 1; 46--57
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Non-ferrous Metals Precision Casting Shape Accuracy in Terms of Ceramic Moulds Anisotropic Material Properties
    Autorzy:
    Biernacki, R.
    Haratym, R.
    Kwapisz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/380660.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    casting shape accuracy
    lost wax casting
    ceramic mould
    anisotropy properties
    dokładność kształtu
    metoda traconego wosku
    forma ceramiczna
    własności anizotropowe
    Opis:
    Shape accuracy analysis of aluminum alloy castings was made in function of ceramic mould properties. Taken it to account was anisotropy of those properties, including influence of ceramic mould properties on the porosity of castings. Ceramic moulds strains, which occur in sintering phase, were evaluated with taking into account the design and production process.
    Źródło:
    Archives of Foundry Engineering; 2013, 13, 1 spec.; 5-8
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Studying the shape of solids of revolution with the use of optical coordinate metrology
    Autorzy:
    Ryniewicz, A.
    Ostrowska, K.
    Bojko, Ł.
    Sładek, J.
    Ryniewicz, A. M.
    Czernilewska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/114405.pdf
    Data publikacji:
    2016
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    optical systems
    measurements
    standards
    shape
    accuracy
    Opis:
    The optical methods of coordinate measuring are a tool that have been more and more frequently used in biometrological applications, due to their advantages. The object of this paper is to set the accuracy of modelling solids of revolution whose shapes and measurements find their application in medical diagnostics with the use of three measurement systems employing laser and structured light. The carry out the studies, a coordinate measuring machine LK CMM with LC60Dx laser scanner, a coordinate measuring Romer Absolute Arm 7320SI with HP-L-20.8 laser scanner and an optical Scan 3D Qualify scanner were used. The use of coordinate technique to analyze the shape of the model solids allowed for the comparison of accuracy of optical methods with reference to standards digitally modelled based in measurements made by CMM Leitz PMM 12106. The most preferable contactless system to render the shape of solids of revolution is the LK CMM with LC60Dx laser scanner.
    Źródło:
    Measurement Automation Monitoring; 2016, 62, 3; 109-113
    2450-2855
    Pojawia się w:
    Measurement Automation Monitoring
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Shape Errors, Internal Porosity, Linear Dimensions Accuracy and Allowances for the Machining of Castings Made in the Replicast CS Process
    Autorzy:
    Haratym, R.
    Sieczka, M.
    Biernacki, R.
    Kwapisz, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/382962.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    Replicast CS process
    shape errors
    dimensional accuracy
    proces Replicast CS
    błędy kształtu
    dokładność wymiarowa
    Opis:
    This research presents comprehensive assessment of the precision castings quality made in the Replicast CS process. The evaluation was made based on quality of the surface layer, shape errors and the accuracy of the linear dimensions. Studies were carried out on the modern equipment, among other things a Zeiss Calypso measuring machine and profilometer were used. Obtained results allowed comparing lost wax process models and Replicast CS process.
    Źródło:
    Archives of Foundry Engineering; 2014, 14, 3; 25-28
    1897-3310
    2299-2944
    Pojawia się w:
    Archives of Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-7 z 7

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