The CAE analysis revealed that a stamping component required extremely high yield strength steel in order to pass the safety requirements. However, springback with this component could cause assembly distortions. The formability prediction was compared with the actual nominal die stamping for splits and wrinkles. The predicted free state springback was compared to the measurements. A compensated die was engineered based on the springback dimensions of the free state stamping. Morphing the negative residual surface created the dimensional compensation. Then a new compensated die face was created. A CAE prediction was used to confirm and adjust the compensated die using iterations of predictions and corrections. Springback deviation, as predicted by the CAE springback analysis, can be significantly reduced through the iterative morphing procedure. The springback compensation technology may greatly improve the dimension accuracy of the part to the point where it can be used without severe dimensional penalties. Ultra high strength steel has very poor formability and significant springback. Its application could be limited without springback compensation. Hence, effective springback compensation allows the use of UHSS for more structural or reinforcement parts. This application greatly facilitates the engineering of lighter and stronger vehicles.


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    Title :

    Springback compensation for ultra high strength stamping


    Contributors:
    Geng, L. (author) / Sa, C.Y. (author) / Oetjens, T. (author) / Zhao, K. (author)


    Publication date :

    2003


    Size :

    7 Seiten, 16 Bilder, 6 Quellen




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




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