000085925 001__ 85925
000085925 005__ 20181203020420.0
000085925 02470 $$2ISI$$a000237556700013
000085925 037__ $$aARTICLE
000085925 245__ $$aThe gas film in Spark Assisted Chemical Engraving (SACE) - A key element for micro-machining applications
000085925 269__ $$a2006
000085925 260__ $$c2006
000085925 336__ $$aJournal Articles
000085925 520__ $$aMachining of various electrically non-conductive materials is possible with Spark Assisted Chemical Engraving (SACE). Even though this technology presents several interesting properties like simplicity, flexibility and the possibility to obtain very smooth machined surfaces, it has one severe weakness: reproducible machining can hardly be achieved. One of the main limiting factors is the unstable gas film around the tool electrode in which the necessary electrical discharges for machining take place. The known facts about this gas film are reviewed and a theoretical model allowing an estimation of its thickness is derived. An experimental method for measuring this thickness using the inspection of the current-voltage characteristics of the process is presented. Several methods to obtain more reproducible machining are proposed. It is demonstrated that decreasing the gas film thickness by changing the wettability of the tool electrode can result in significantly higher machining repeatability.
000085925 6531_ $$aSACE
000085925 6531_ $$aGlass micro-machining
000085925 6531_ $$aBubble evolution
000085925 6531_ $$aRobotics
000085925 6531_ $$aMicroengineering
000085925 6531_ $$a[SACE]
000085925 700__ $$aWüthrich, Rolf
000085925 700__ $$aHof, L.A.
000085925 773__ $$j46$$tInternational journal of Machine Tools and Manufacture$$q828-835
000085925 909C0 $$0252016$$pLSRO
000085925 909CO $$ooai:infoscience.tind.io:85925$$pSTI$$particle
000085925 937__ $$aLSRO-ARTICLE-2006-014
000085925 973__ $$rREVIEWED$$sPUBLISHED$$aEPFL
000085925 980__ $$aARTICLE