Design of stamping and sheet hydroforming test unit

• Autorzy: Dilmec M. , Turkoz M. , Selcuk Halkaci H.
• Języki publikacji: EN

Abstrakty

EN

In order to determine the formability of sheets and obtain the optimum process parameters for the processes, various experiments have to be performed. Some of these experiments are Limiting Dome Height (LDH) and Marciniak tests which are traditional biaxial tests and sheet hydroforming tests. For the purpose of determining process limitations and estimation of stamping characteristics in sheet metal forming, the forming limit diagram (FLD) is used. In this study, a test unit has designed for simulating the processes. In this test unit, traditional biaxial tests and hydroforming tests can be conducted. Detailed system shame for the unit is given. The punch has 35 ton punch force, 300 mm punch stroke and 5-250 mm/min punch velocity. The blank holder has 40 ton force. The hydraulic system's properties are; the fluid medium capable to have 10-700 bar, the pressurized fluid has 10 lt/min volume of flow. The electronic system is composed of a computer and an electronic circuit which are used for adjusting the blank holder force, pressure of fluid medium and punch velocity as using convenient hydraulic elements.

Słowa kluczowe

EN

limiting dome height; Marciniak test; sheet hydroforming; forming limit diagram

PL

ograniczenie wysokości kopuły; test Marciniaka; hydrokształtowanie blachy; wykres ograniczeń kształtowania

• Wydawca: Komitet Nauki o Materiałach PAN
• Czasopismo: Archives of Materials Science
• Rocznik: 2007
• Tom: Vol. 28, nr 1-4
• Strony: 25--29
• Opis fizyczny: Bibliogr. 8 poz., rys.

Twórcy

autor

Dilmec M.

autor

Turkoz M.

autor

Selcuk Halkaci H.

• Mechanical Engineering Department, Selcuk University, Alaeddin Keykubat Campus 42250, Konya, Turkey,

Bibliografia

• [1] Z. Marciniak., J.L. Duncan., S.J. Hu, Mechanics of Sheet Metal Forming, Butterworth Heinemann, 2002.
• [2] F. Ozturk, D. Lee, Analysis of forming limits using ductile fracture criteria, Journal of Materials Processing Technology 147 (2004) 397-404.
• [3] Test Method for Determining Forming Limit Curves, ASTM 2218/02 (2008).
• [4] Z. Marciniak., K. Kuczynski, Limit Strains in the Processes of Stretch-Forming Sheet Metal, International Journal of Mechanical Sciences 9 (1967) 609-620.
• [5] H. Emilie, J. E Carsley, R Verma, Development of Forming Limit Diagrams of Aluminum and Magnesium Sheet Alloys at Elevated Temperatures, ASM International, Metal Park, Ohio, 2007, 288-296.
• [6] S.H. Zhang, Developments in hydroforming, Journals of Materials Processing Technology 91 (1999) 236-244.
• [7] L. Lang, J .Danckert, K.B. Nielsen, Investigation into the effect of pre-bulging during hydromechanical deep drawing with uniform pressure onto the blank, International Journal of Machine Tools and Manufacture 44 (2004) 649-657.
• [8] S.H. Zhang, J. Danckert, Development of hydro-mechanical deep drawing, Journal of Materials Processing Technology 83 (1998) 14-25.