Fraunhofer-Institut für Werkzeugmaschinen und Umformtechnik IWU
This contribution presents a comprehensive analysis of High-Speed Blanking (HSB) using electromagnetically (EM) driven tools, with a focus on augmenting efficiency and enhancing the quality of cut surfaces. The study explores the blanking of 2 mm thick 22MnB5 sheets using EM-accelerated tools capable of reaching stamping speeds up to 15 m/s. A pivotal aspect of the investigation is the optimization of the acceleration efficiency. The aim is to achieve maximum cutting speed for a given electrical input energy. Then, the impact on the quality of the cut surfaces is investigated. The research methodology includes detailed numerical simulations of the cutting process using LS DYNA, coupled with precise calculations of energy distribution and losses to ascertain the most effective ram speed. Further, the study involves a meticulous metallographic examination of adiabatic shear bands, offering valuable insights into the microstructural transformations triggered by HSB. The outcomes of this study provide significant contributions to the understanding of the operational capabilities and the physical implications of HSB utilizing EM drive technology and constitute notable progression in the evolution of this High-Speed Blanking technology. This serves as a vital reference for advancements in high-precision manufacturing processes.
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