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Micromachines 2017, 8(11), 322; https://doi.org/10.3390/mi8110322

Investigation of Production Limits in Manufacturing Microstructured Surfaces Using Micro Coining

Institute of Manufacturing Technology, Friedrich-Alexander-Universität, Erlangen-Nürnberg, 91058 Erlangen, Germany
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Received: 27 September 2017 / Accepted: 25 October 2017 / Published: 30 October 2017
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Abstract

The application of microstructured surfaces is one possible method to reduce friction in lubricated contacts between components with relative movement. Due to this, the energy efficiency and the occurring wear during the operating time of the final products could be decreased. To manufacture structured surfaces economically, a micro coining process was analyzed within this study. This process offers the potential for integration into the established manufacturing processes of different final products, such as tappets used in a valve train. Thus, large-scale production is enabled. To detect the manufacturing limits of the micro coining process, the manufacturing of the coining tools as well as the coining process needs to be investigated. Within this study, the achievable accuracy and the failure of cuboid and cylindrical microstructure elements with selected dimensions were analyzed. For both types of microstructures, the minimal lateral dimensions were detected. Besides the achievable accuracy, correlations between different geometrical dimensions of the micro elements are presented. Additionally, the aspect ratio is detected as the main cause of failure for the micro coining process. In general, the suitability of a coining process for manufacturing microstructured surfaces is proven. View Full-Text
Keywords: tribology; microstructures; geometrical accuracy tribology; microstructures; geometrical accuracy
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Zahner, M.; Lentz, L.; Steinlein, F.; Merklein, M. Investigation of Production Limits in Manufacturing Microstructured Surfaces Using Micro Coining. Micromachines 2017, 8, 322.

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