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Generating micro geometries with air assisted jet electrochemical machining

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

:
Volltext urn:nbn:de:0011-n-748717 (790 KByte PDF)
MD5 Fingerprint: 816876c916c53a79a62ca62904f2295a
Erstellt am: 8.4.2011


European Society for Precision Engineering and Nanotechnology -EUSPEN-:
European Society for Precision Engineering and Nanotechnology, EUSPEN 2008. Vol.2 : 10th Anniversary International Conference, Kongresshaus Zürich, 18th-22nd May 08
Bedford: Euspen, 2008
ISBN: 978-0-9553082-5-3
S.420-424
European Society for Precision Engineering and Nanotechnology (EUSPEN International Conference) <10, 2008, Zürich>
Englisch
Konferenzbeitrag, Elektronische Publikation
Fraunhofer IWU ()
Jet Electrochemical Machining; JET-ECM; localized anodic dissolution; COMSOL multiphysic; machining micro geometry; pit profile; free closed jet; elektrochemisches Abtragen; Fertigung von Mikrogeometrien; geschlossener elektrolytischer Freistrahl; FEM simulation; Luftunterstützung

Abstract
In Jet Electrochemical Machining (Jet-ECM), the electrolytic current between the anodic work piece and the cathodic nozzle is supplied via an electrolyte jet which is ejected from a nozzle. The main advantage compared to other EC-processes is, the restriction of the electrolytic current to a limited area by the jet. The dissolution rate and the machining position can easily be controlled by setting the electric current and the nozzle position. Higher dissolution rates compared to pulsed ECM are possible, because continuous direct current is applied. In this study the property of using an additional jet of compressed air to assist the procedure is presented. The additional jet of compressed air removes the electrolyte film enclosing the metallic nozzle, which is caused by surface tension. Thereby localisation is enhanced and working gaps of about 100 µm (distance between work piece and nozzle) can be used. Furthermore a FEM model was developed to simulate selected processing results.

: http://publica.fraunhofer.de/dokumente/N-74871.html