Volume 6, 2019
Special Issue - Advances in Research in New Forming Technology - from the ICNFT2018
|Number of page(s)||11|
|Published online||24 May 2019|
Lubricant-free deep drawing using CO2 and N2 as volatile media injected through laser-drilled microholes
Institut für Strahlwerkzeuge, University of Stuttgart, Pfaffenwaldring 43, 70569 Stuttgart, Germany
2 Institute for Metal Forming Technology, University of Stuttgart, Holzgartenstrasse 17, 70174 Stuttgart, Germany
3 Fraunhofer Institute for Interfacial Engineering and Biotechnology, Fraunhofer IGB, Nobelstraße 12, 70569 Stuttgart, Germany
* e-mail: firstname.lastname@example.org
Accepted: 24 April 2019
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
© E. Zahedi et al., Published by EDP Sciences 2019
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