Abstract
The development of electromechanical servo presses permits greater flexibility in process kinematics. When this feature is exploited in a targeted manner, the result of the forming process is largely determined by the dynamic properties of the forming machine. Here, attunement between control and mechanics is a central criterion for ensuring good motion dynamics, positioning accuracy and component quality. The increased motion dynamics during workpiece contact require a dynamic stability of the system technology in order to ensure process reliability. They affect the reactions of the machine structure as a result of the attendant process forces and inertial loads. The resulting oscillations affect the component quality and the operational strength of the machine. The effects of the slide guide, press mounting support, mass distribution and stiffness distribution are studied on the basis of a linearly elastic model of a servo-screw press and the results of an experimental modal analysis. The results of this study are intended to help shorten commissioning times and increase the productivity of servo-screw presses.
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Notes
A higher scaled illustration of Fig. 4 can be downloaded at the online version of this article as electronic supplementary material ESM_4.
A coloured illustration of Fig. 8 can be downloaded at the online version of this article as electronic supplementary material ESM_8.
A higher scaled and more detailed illustration of Fig. 10 can be downloaded at the online version of this article as electronic supplementary material ESM_10.
A higher scaled and coloured illustration of Fig. 11 can be downloaded at the online version of this article as electronic supplementary material ESM_11.
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Acknowledgments
The Authors would like to express their gratitude to Prof. Dr.-Ing. W. Graf of the Institute of Structural Statics and Dynamics (ISD, Dresden University of Technology) and Dipl.-Ing. (FH) M. Werner of Fraunhofer Institute for Machine Tools and Forming Technology (IWU) for their extensive professional support. The results presented in this paper are part of a public research project at Fraunhofer IWU. The project (16896 BR) of the Europäische Forschungsvereinigung für Blechverarbeitung e. V. (EFB, “European Research Association for Sheet Metal Working”) was financed by the Arbeitsgemeinschaft industrieller Forschungs-Vereinigungen—Otto von Guericke e.V. (AiF; “Otto von Guericke Federation of Industrial Research Associations”) as part of the programme to support Industrial Community Research and Development (Industrielle Gemeinschafts-Forschung—IGF) with funds from the German Federal Ministry of Economics and Technology (BMWi) following an ordinance of the German Federal Parliament. The financial support is gratefully acknowledged by the authors.
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Müller, P., Kranz, B., Kriechenbauer, S. et al. Experimental and numerical modal analysis of a servo-screw press with coupled drives as a basis for increasing flexibility and dynamics. Prod. Eng. Res. Devel. 9, 203–214 (2015). https://doi.org/10.1007/s11740-014-0596-1
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DOI: https://doi.org/10.1007/s11740-014-0596-1