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Browsing by Subject "faza wyciskania"

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  • thumbnail.journal.alt
    Item type:Doctoral Dissertation, Access status: Open Access ,
    Analiza parametrów siłowych końcowej fazy wyciskania metali
    (Data obrony: 2008-07-01) Rękas, Artur
    Wydział Metali Nieżelaznych
    In the work, results of FEM numerical calculations and experimental investigations of indirect extrusion process were presented. Influence of main process parameters with regards of metal flow on the final stage of indirect extrusion force characteristic was investigated. The aim of matching process parameters that decide on the force characteristic in the final stage was to minimize length of the billet rest after indirect extrusion. Force characteristics, state of strains and stresses, distributions of temperatures, metal flow and velocity field of metal particles in the deformation zone were analysed. Metal flow was analysed for the different elongation coefficients and the different billet lengths, by using the visioplastic method. Distributions of strains allowed to determine the range of the main deformation zone. In indirect extrusion trials the force characteristics was determined for the different process parameters.