The gas film in Spark Assisted Chemical Engraving (SACE) - A key element for micro-machining applications
By R. Wüthrich, L. Hof. 2006
158 citations recorded by the source corpus.
Machining 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.
Subfields: Biomedical Engineering, Electrical and Electronic Engineering, Mechanical Engineering
View Paper: https://www.semanticscholar.org/paper/92e1018d8d2e15a8b12431354703bcadea5f34ec
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In Biomedical Engineering
In Electrical and Electronic Engineering
In Mechanical Engineering
Citations in the corpus
- 3D microstructuring of Pyrex glass using the electrochemical discharge machining process (2007, methodology): “Due to the complexity of the ECDM drilling process, many investigations were performed including the material removal mechanism [11, 15], discharge performance [16], two regimes (discharge and hydrodynamic regime) depending on the drilling depth under the gravity-feed condition [17] and machining re”