Issue |
MATEC Web Conf.
Volume 190, 2018
5th International Conference on New Forming Technology (ICNFT 2018)
|
|
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Article Number | 14007 | |
Number of page(s) | 10 | |
Section | Dry metal forming, Special session SPP 1676 | |
DOI | https://doi.org/10.1051/matecconf/201819014007 | |
Published online | 18 September 2018 |
Lubricant-free deep drawing using CO2 and N2 as volatile media injected through laser-drilled microholes
1
Institut für Strahlwerkzeuge, Universität Stuttgart, Pfaffenwaldring 43, 70569 Stuttgart, Germany
2
Institut für Umformtechnik, Holzgartenstraße 17, 70174 Stuttgart, Germany
3
Fraunhofer Institute for Interfacial Engineering and Biotechnology, Fraunhofer IGB, Nobelstraße 12, 70569 Stuttgart, Germany
*
Corresponding author : ehsan.zahedi@ifsw.uni-stuttgart.de
Most metal forming processes use lubricants based on mineral oils as an intermediate medium to reduce friction and wear. To avoid the well-known drawbacks of oil lubrication, a novel and environment friendly lubrication system for deep-drawing processes was demonstrated at the University of Stuttgart. Liquid carbon dioxide and gaseous nitrogen are being used as volatile lubrication during the deep-drawing process, locally injected at high pressure through laser-drilled microholes. This new tribological system provides a significantly enlarged working range and at least 15% larger drawing depths compared to conventional oil lubrication.
Key words: Deep drawing / Laser micro machining / Drilling
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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