NOWOSIELSKI Maciej AGH University of Science and Technology

Spoluautoři ZABA Krzysztof, KWIATKOWSKI Michal, KITA Pawel

This paper presents the issues related to minimizing the springback effect and focuses on optimization shape of tools. Stamping process simulations were performed using the eta/Dynaform. FEM-based simulations let to better understand how to design tools and forming process parameters affect the final quality of components and productivity. The mathematical model of pressing process takes into account a springing plate and three core tools: punch, die and punch, which are given modifications to compensate the springback effect. Tools are rigid elements with the selected kinematic and load conditions. The simulations take into account the friction coefficient, which is an important factor in the process of formation. Blank material model should take into account large elastic-plastic deformation as well as the effects of plastic anisotropy properties. Numerical simulations used 36 model of the material, 3-parameter Barlat model. The influence of numerical parameters on the accuracy and efficiency of numerical calculations were determined. This allowed to determine the optimal numerical model and gave satisfactorily results accurate with not very long calculations time. Determined through simulations tool shape correction allows for improvement in the quality of the resulting product. Verification of the numerical calculations were technological tests for sheets made of nickel Superalloy. Tests were performed on samples of varying degrees of deformation at room temperature. The results will be used to build a database of materials. At each stage of deformation were determined fields of displacement and changes in the distribution of thickness.

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