Abstract
Shear cutting induces high strains and work hardening into the shear-affected zone, thus reducing the formability of the sheet metal material during subsequent forming operations. A common method for increasing the residual formability of shear-cut component edges is to shave the surfaces. The shaving process allows for the removal of highly hardened areas from a pre-cut contour, resulting in a comparatively high residual formability of the cutting surface. However, as known from conventional cutting, a burr remains on the shear surface when shaving. Such burr formation is undesirable and therefore usually has to be removed afterward. For this reason, a new process has been developed which combines two processes within the same stroke of punch, the counter-cutting, and shaving process, enabling the production of burr-free shear surfaces showing a high portion of clean-cut proportions and significantly 1.6 times higher hole expansion ratios than conventional cutting surfaces. The present paper deals with numerical and experimental investigations carried out in the course of the process development with the high-strength sheet metal material DP600.
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Senn, S., Liewald, M. (2021). A New Approach for the Production of Burr-Free Sheet Metal Components Having Significantly Increased Residual Formability. 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_232
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DOI: https://doi.org/10.1007/978-3-030-75381-8_232
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