The machining temperature during Spark Assisted Chemical Engraving of glass

The temperature at which Spark Assisted Chemical Engraving (SACE) takes place is a debated question. Several models were built to predict the material removal rate, but each assumed a different machining temperature. This communication aims to give clarification about the machining temperature. It is shown that this temperature can vary depending on the drilling strategy and the machined structure geometry. This work deepens the understanding of the SACE machining process and it aims to help in future developments of models to estimate the temperature and machining rate for SACE.