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Effect of tool geometry variations on the punch force in micro deep drawing of rectangular components

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Abstract

In this study, the impact of tool geometry variations on the punch force in micro deep drawing of rectangular parts was investigated. In contrast to deep drawing of rotationally symmetrical components in deep drawing of rectangular parts further tool geometry parameters, such as the corner radii of the die and punch influence the process and the process result. However, their impact on a micro deep drawing process is not known. Experimental micro deep drawing tests, as well as FEM simulations were carried out to determine the punch forces for a variation of the corner radius and the die radius. It could be demonstrated that an increasing corner radius size leads to an increasing punch force in deep drawing. Enlarging the corner radius from 147 to 250 µm resulted in a 36 % higher punch force. In contrast, an increase of the die radius size results in a decreasing punch force. Here, enlarging the die radius from 76 to 143 µm led to a decrease of the punch force of 26 %.

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Acknowledgments

The authors gratefully acknowledge the financial support by the German Research Foundation (DFG) for the subproject B7 of the Collaborative Research Centre 747. Special thanks go to the involved employees of the Laboratory for Precision Machining LFM for preparation of the tool geometries and the employees of the Bremen Institute for Metrology, Automation and Quality Science BIMAQ for tactile measurements.

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Authors and Affiliations

  1. Bremer Institut für angewandte Strahltechnik GmbH, Bremen, Germany

    Gerrit Behrens, Maximilian Ruhe & Hendrik Tetzel

  2. Bremer Institut für angewandte Strahltechnik, University of Bremen, Bremen, Germany

    Frank Vollertsen

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  1. Gerrit Behrens
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  2. Maximilian Ruhe
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  3. Hendrik Tetzel
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  4. Frank Vollertsen
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Correspondence to Hendrik Tetzel.

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Behrens, G., Ruhe, M., Tetzel, H. et al. Effect of tool geometry variations on the punch force in micro deep drawing of rectangular components. Prod. Eng. Res. Devel. 9, 195–201 (2015). https://doi.org/10.1007/s11740-015-0604-0

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  • DOI: https://doi.org/10.1007/s11740-015-0604-0

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