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Simulation of the shape of micro geometries generated with jet electrochemical machining

 
: Hackert, M.; Meichsner, G.; Schubert, A.

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Fulltext urn:nbn:de:0011-n-923100 (154 KByte PDF)
MD5 Fingerprint: 2d78e768e5595bfce4762f141deb42fb
Created on: 8.4.2011


COMSOL Conference 2008. Proceedings. CD-ROM : Hannover, November 9th - 11th 2008
Hannover, 2008
ISBN: 978-0-9766792-3-3
4 pp.
European COMSOL Conference <2, 2008, Hannover>
English
Conference Paper, Electronic Publication
Fraunhofer IWU ()
Jet Electrochemical Machining; localized anodic dissolution; mesh displacement; closed electrolytic free jet

Abstract
Jet Electrochemical Machining (Jet-ECM) is an unconventional procedure for micromachining. Based on localized anodic dissolution three-dimensional geometries and microstructured surfaces can be manufactured using Jet-ECM. The main advantage compared to other electrochemical procedures is, that the jet restricts the electric current density to a limited area.
An air assistance developed at Chemnitz UT and Fraunhofer IWU allows to apply small working gaps of about 100 ?m. Due to the high mean velocity in the jet of about 20 m/s the electrolyte supply is sufficient for using continuous direct current and higher dissolution rates compared to pulsed ECM are possible. In this study COMSOL Multiphysics is used to simulate the electric current density in the jet and the dissolution process in a time dependent model for Jet-ECM point processing, that means without a movement of the nozzle. Simulation and reality show a good coincidence.

: http://publica.fraunhofer.de/documents/N-92310.html