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    Wyświetlanie 1-9 z 9
    Tytuł:
    Research on inner surface of hydroformed tubes
    Autorzy:
    Ceclan, V. A.
    Grozav, S. D.
    Kuric, I.
    Powiązania:
    https://bibliotekanauki.pl/articles/102205.pdf
    Data publikacji:
    2017
    Wydawca:
    Stowarzyszenie Inżynierów i Techników Mechaników Polskich
    Tematy:
    surface
    hydroforming
    tubes
    Opis:
    In this paper a reserch regarding the surfece of hydroforming tubs, made by aluminium and cooper is presented. Tube hydroforming is very important production method considering that metal tubes are widely used in a great variety of engineering products, such as automobile, aircraft, air conditioner, air compressor, exhaust systems, fluid lines. The results show that the surface of tubes it is influence of the hydroforming process. the material of the tube in research of surface is also very important.
    Źródło:
    Advances in Science and Technology. Research Journal; 2017, 11, 4; 311-317
    2299-8624
    Pojawia się w:
    Advances in Science and Technology. Research Journal
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Casting Mould for Rapid Tube Hydroforming Prototyping
    Autorzy:
    Kochański, Andrzej
    Sadłowska, Hanna
    Powiązania:
    https://bibliotekanauki.pl/articles/106987.pdf
    Data publikacji:
    2020
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    hydroforming
    casting mould
    rapid prototyping
    process numerical modelling
    hydroforming classification
    Opis:
    In recent years, hydroforming has clearly expanded its range of industrial applications due to the growing interest in products which combine high strength with low weight. A current limitation of this technology was its economically justified production volume since the costs of producing tools eliminates the possibility of using hydroforming technology in prototype and single part production. The paper presents a freshly patented solution that allows for single part hydroforming. The new technology combines traditional hydroforming machines with a new approach to tool production. The new rapid die is made quickly and cheaply. The use of materials known from the production of foundry moulds causes the die to deform during hydroforming, but it is a controlled deformation. Thanks to the use of numerical modelling, the deformation of the mould cavity is predicted and taken into account at the design stage. The article presents important issues that need to be considered in the design of this innovative process.
    Źródło:
    Journal of Casting & Materials Engineering; 2020, 4, 2; 29-33
    2543-9901
    Pojawia się w:
    Journal of Casting & Materials Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Strain Measurements in Free Tube Hydroforming Process
    Autorzy:
    Sadłowska, H.
    Morawiński, Ł.
    Jasiński, C.
    Powiązania:
    https://bibliotekanauki.pl/articles/351278.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    strain measurement
    hydroforming
    stereovision
    Opis:
    The paper presents a method of measuring deformations of cylindrical samples on the testing machine for free tube hydroforming experiments. During experiments a sample made of a thin-walled metal tube is expanded by the internal pressure of the working liquid and additionally subjected to axial compression. This results in a considerable circumferential deformation of the tube and its shortening. Analysis of the load cases and their impact on the deformations can be helpful in determining e.g. tube material properties or general limiting conditions in the tube hydroforming process. In connection with the above, the value of deformations and knowledge of their course during experiment has become one of the most important problems related to the issue described above.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 1; 257-263
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A Simplified Approach for the Hydro-forming Process of Bi-metallic Composite Pipe
    Autorzy:
    Zheng, M.
    Gao, H.
    Teng, H.
    Hu, J.
    Tian, Z.
    Zhao, Y.
    Powiązania:
    https://bibliotekanauki.pl/articles/355930.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    metallic pipe
    composite
    hydroforming
    pressure
    residual stress
    Opis:
    In this article, it aims to propose effective approaches for hydro-forming process of bi-metallic composite pipe by assuming plane strain and elastic-perfectly plastic material model. It derives expressions for predicting hydro-forming pressure and residual stress of the forming process of bi-metallic composite pipe. Test data from available experiments is employed to check the model and formulas. It shows the reliability of the proposed model and formulas impersonally.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 2A; 879-883
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The Hydro-Multipoint Forming Process of Complex Sheet Metal Parts
    Autorzy:
    Paunoiu, V.
    Teodor, V.
    Baraoiu, N.
    Powiązania:
    https://bibliotekanauki.pl/articles/99491.pdf
    Data publikacji:
    2015
    Wydawca:
    Wrocławska Rada Federacji Stowarzyszeń Naukowo-Technicznych
    Tematy:
    multipoint forming
    sheet hydroforming
    deep drawing
    simulation
    Opis:
    The paper presents the concept of a new tool for the sheet metal blanks deformation which is based on the hydro-multipoint method. In this method the upper die with pins is replaced with a hydraulic pressure chamber. The blank sheet is placed between two flexible interpolators and it is deformed under the action of the pressure applied from the hydraulic chamber until it takes the shape of the multipoint die located at the bottom of the equipment. A critical review of the main hydroforming and multipoint forming methods is done. Then, a simulation model for the new hydro-multipoint forming tool is developed. Material thickness, stresses and part dimensions are analysed. A mechanical hydro-multipoint forming tool which was designed and manufactured based on the new concept is presented. Using this tool a number of experiments are done. The real parts are evaluated in terms of surface quality and parts dimensions. The experimental results come to validate the numerical ones. Finally, it was concluded that this new die concept could be used in manufacturing complex sheet metal parts.
    Źródło:
    Journal of Machine Engineering; 2015, 15, 3; 106-116
    1895-7595
    2391-8071
    Pojawia się w:
    Journal of Machine Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Physical and Numerical Modeling of the Manufacturing Process of a Complex Shape Pressed Element from a Nickel Superalloy
    Autorzy:
    Hyrcza-Michalska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/352750.pdf
    Data publikacji:
    2020
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    complex geometry drawpiece
    nickel superalloys
    drawability
    hydroforming
    numerical modelling FEM
    Opis:
    Products of complex geometry, aerodynamic shape and high quality surface finishes are among the most difficult to produce by using stamping methods. When additionally materials with special properties are intended, the task of determining their technological character becomes difficult to solve without the use of physical and numerical methods of process modeling. The paper presents the results of modeling the process of producing a single tube of the jet engine tubular diffuser subassembly. This is a product representative of such a complex geometry one. The charge material for this element requires resistance to operating conditions at elevated temperature and high durability. Therefore, an Inconel type nickel superalloy was proposed for the charge material. In the solution of designing the method of producing a single diffuser tube task, the capabilities of the AutoGrid automatic strain analyzer and the FEM simulation software Eta/Dynaform 5.9 were combined. Numerical simulations of different variants of the manufacturing process of the diffuser tube were made using the Eta/Dynaform 5.9 software. The results of forming simulations became the basis for the alternative technological cycle design of this drawpiece.
    Źródło:
    Archives of Metallurgy and Materials; 2020, 65, 1; 215-218
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of hydroforming of the Y-shape branch
    Badania procesu rozpęczania hydromechanicznego trójnika skośnego
    Autorzy:
    Stadnik, R.
    Kazanecki, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/264081.pdf
    Data publikacji:
    2009
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    rozpęczanie hydromechaniczne
    droga obciążenia
    króciec
    hydroforming
    loading path
    Y-shape branch
    Opis:
    This paper describes FEM simulations and experiments of the hydroforming process, which were carried out using test stand and ABAQUS/CAE software. The application of simulation methods to the development of the hydroformed parts was illustrated. The influence of the forming conditions, such as the loading path of the hydraulic pressure and the axial feeding, on the hydroforming of Y-shapes was investigated. These estimated conditions were improved in FEM simulations and then verified with hydroforming experiment. A tube made of stainless and unalloyed steels were taken into consideration both in a numerical and experimental study. The experimental investigation shows considerable influence of the mechanical properties of the examined steel grades on the metal flow and final shape, especially the thickness distributions and the branch height. The results from the experiment and FEM simulation, e.g. loading path, thickness distributions or branch height were in good agreement. This means that numerical simulation is a good way to evaluate the part formability.
    W pracy opisano symulacje numeryczne i badania eksperymentalne wykonane przy pomocy programu ABAKUS/CAE oraz odpowiednio wyposażonego stanowiska badawczego. Przedstawiono zastosowanie metod numerycznych przy rozpęczaniu trójników skośnych. Zbadano wpływ parametrów kształtowania, takich jak: ciśnienie cieczy, siłę osiową spęczającą. Te oszacowane parametry zostały udoskonalone w trakcie symulacji numerycznych a następnie zweryfikowane w trakcie eksperymentu. Zarówno w symulacjach numerycznych, jak i badaniach eksperymentalnych rozpatrywano stale stopowe odporne na korozję oraz stale niestopowe. Badania eksperymentalne pokazały znaczący wpływ własności mechanicznych rozpatrywanych stali na kształtowanie materiału oraz kształt końcowy, zwłaszcza na zmianę grubości ścianki gotowego elementu oraz wysokość króćca. Wyniki obu wykonanych badań, np. droga obciążenia, zmiana grubości czy wysokość króćca, wykazały zgodności. Oznacza to, że symulacje numeryczne są odpowiednim sposobem do określenia zdolności materiałów do odkształceń plastycznych.
    Źródło:
    Metallurgy and Foundry Engineering; 2009, 35, 1; 13-26
    1230-2325
    2300-8377
    Pojawia się w:
    Metallurgy and Foundry Engineering
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Research on Liquid Forming Process of Nickel Superalloys Thin Sheet Metals
    Autorzy:
    Hyrcza-Michalska, M.
    Powiązania:
    https://bibliotekanauki.pl/articles/355928.pdf
    Data publikacji:
    2017
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    drawability
    local strain distribution measurements
    forming limit curve
    AutoGrid strain analyzer
    thin sheet metals
    nickel superalloys
    Inconel 625
    Inconel 718
    hydroforming
    Opis:
    The paper presents the study of drawability of thin sheet metals made of a nickel superalloy Inconel type. The manufacturing process of axisymmetric cup – cone and a closed section profile in the form of a circular tube were designed and analyzed. In both cases, working fluid-oil was used in place of the rigid tools. The process of forming liquid is currently the only alternative method for obtaining complex shapes, coatings, and especially if we do it with high-strength materials. In the case of nickel superalloys the search for efficient methods to manufacture of the shaped shell is one of the most considerable problems in aircraft industry [1-5]. However, the automotive industries have the same problem with so-called advanced high-strength steels (AHSS). Due to this, both industrial problems have been examined and the emphasis have been put on the process of liquid forming (hydroforming). The study includes physical tests and the corresponding numerical simulations performed, using the software Eta/Dynaform 5.9. Numerical analysis of the qualitative and quantitative forecasting enables the formability of materials with complex and unusual characteristics of the mechanical properties and forming technology. It has been found that only the computer aided design based on physical and numerical modeling, makes efficient plastic processing possible using a method of hydroforming. Drawability evaluation based on the determination of the mechanical properties of complex characteristics is an indispensable element of this design in the best practice of industrial manufacturing products made of thin sheet metals.
    Źródło:
    Archives of Metallurgy and Materials; 2017, 62, 4; 2355-2358
    1733-3490
    Pojawia się w:
    Archives of Metallurgy and Materials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Soft modelling of the shaping of metal profiles in rapid tube hydroforming technology
    Autorzy:
    Sadłowska, Hanna
    Kochański, Andrzej
    Powiązania:
    https://bibliotekanauki.pl/articles/29520063.pdf
    Data publikacji:
    2022
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Wydawnictwo AGH
    Tematy:
    rapid tube hydroforming
    RTH
    manufacturing
    constitutive modelling
    soft modelling
    finite element method
    FEM
    artificial neural networks
    ANN
    hydroformowanie rur
    produkcja
    modelowanie konstytutywne
    miękkie modelowanie
    metoda elementów skończonych
    MES
    sztuczne sieci neuronowe
    Opis:
    The paper presents an approach to the impact of process parameters in innovative RTH (Rapid Tube Hydroforming) technology for shaping closed metal profiles in flexible and deformable dies. In order to implement the assumed deformation of the deformed profile, the RTH technology requires the monitoring and control of numerous technological parameters, including geometric, material, and technological variables. The paper proposes a two-stage research procedure considering hard modelling (constitutive) and soft modelling (data-driven). Due to the complexity of the technological process, it was required to develop a numerical finite element method FEM model focused on obtaining the adequate profile deformation measured by the ellipsoidality of the cylindrical profile. Based on the results of the numerical experiments, a preliminary soft mathematical model using ANN was developed. Analysing the soft model results, several statistical hypotheses were made and verified to investigate the significance of selected process parameters. Thanks to this, it was possible to select the most important process parameters, i.e., the properties of moulding sands used for RTH dies: the angle of internal friction and cohesion.
    Źródło:
    Computer Methods in Materials Science; 2022, 22, 4; 201-210
    2720-4081
    2720-3948
    Pojawia się w:
    Computer Methods in Materials Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-9 z 9

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