Abstract
This paper presents an engineering procedure for stamping irregular sheet metal parts with an elastic blankholder, providing a localized contact pressure to ensure stamped parts without failures of cracks and wrinkles. This is done by arranging the height of the blankholder supporting elements in a die set, which is made using standard manufacturing quality and is implemented in a press line equipped with standard die cushions. However, the contact pressure is very sensitive to the height of supporting elements. To eliminate the inherent noise from the geometric dimension and tolerance of the die set, a finite element model for optimization of the contact pressure must be created according to the actual die set geometry. In this study, the blankholder geometry for stamping a fender-like part was scanned by GOMATOS and the height of cylindrical supporting elements was measured by inserting feeler gauges between the blankholder and the supporting elements according to the outcomes of finite element analysis.
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Acknowledgments
The per diem for the first author working on this research was supported by the Ministry of Science and Technology of the Republic of China with the grant coded MOST 108-2918-I-005-008.
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Fann, KJ., Liewald, M., Riedmüller, K.R. (2021). Localized Contact Pressure of Blankholder for Stamping Irregular Sheet Parts by Configuring the Height of the Supporting Elements. In: Daehn, G., Cao, J., Kinsey, B., Tekkaya, E., Vivek, A., Yoshida, Y. (eds) Forming the Future. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-030-75381-8_216
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DOI: https://doi.org/10.1007/978-3-030-75381-8_216
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