An Invesigation Into the Influence of Blankholder Force on Springback in U-Bending

• Autorzy: Kadkhodayan M. , Zafarparandeh I.

Warianty tytułu

PL

Badanie wpływu siły dociskacza na sprężynowanie przy zagięciach typu "U"

• Języki publikacji: EN

Abstrakty

EN

Springback is the main defect in U-channel forming process. Applying the blankholder force is one of the ways of solving the problem. On the other hand the value of the blankholder force should be chosen carefully. In this paper the relation of the blank-holder force and final springback, taking a benchmark of NUMISHEET'93 2-D draw bending and using a commercial FEM code has been studied. The simulations are pre-formed for AA5754-O and DP-Steel. In order to probe the relation, five different values are utilized in simulations. It is found that springback increases for the middle values of the blankholder force where the stretching and bending have equal effects on the blank. The maximum required punch loads are compared for the different values of blankholder force.

PL

Sprężynowanie jest głównym mankamentem w procesie formowania zagięć typu „U”. Zastosowaie siły dociskacza jest jednym ze sposobów rozwiązania tego problemu. Z drugiej strony, wartość siły dociskacza powinna być precyzyjnie wyznaczana. W niniejszej pracy omawiany jest związek siły dociskacza i końcowego sprężynowania, przy zastosowaniu wzorca NUMISHEET' 93 2-D oraz wykorzystaniu dostępnego na rynku kodu FEM. Symulacje zostały wykonane dla stali DP i AA5754-O. W celu przetestowania wspomnianego związku, w symulacjach wyznaczono pięć różnych wartości. Zaobserwowano, iż zginacze mają taki sam wpływ na materiał. Porównywane są maksymalne wymagane obciążenia tłocznika dla różnych wartości siły dociskacza.

Słowa kluczowe

EN

blankholder force; springback; U-bending

PL

sprężynowanie; zagięcia typu U; siła dociskacza

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2009
• Tom: Vol. 54, iss. 4
• Strony: 1183--1190
• Opis fizyczny: Bibliogr. 21 poz., rys., tab.

Twórcy

autor

Kadkhodayan M.

autor

Zafarparandeh I.

• Department of Mechanical Engineering, Ferdowsi University of Mashhad, 91775-1111, Mashhad, Iran

Bibliografia

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