| Popis: |
Geopolymer was widely used for development purposes, but only a few were tested for machining purposes. This study focused on the parameter which can give effect to the tool wear in structural rubberized fly ash geopolymer (RFGP) and the most significant factor of machining in giving the best tool wear. This experiment was conducted using a CNC lathe machine with cutting speed 1000, 2000 and 3000 rpm, feed rate 0.05, 0.10 and 0.15 mm/rev and depth of cut 0.2, 0.4 and 0.6 mm. Taguchi L9 orthogonal array was used to design of experiment. Optimal cutting conditions was determined using signal-to-noise (S/N) ratio which calculated for VB max according to the “smaller-is-better” approach. The effects of the cutting parameters on tool wear were evaluated by analysis of variance (ANOVA). Results implied tool wear decreased with cutting speed. Therefore, the cutting speed of 2000 rpm, feed rate 0.15 mm/rev and depth of cut 0.4 mm demonstrated the lowest tool wear. The statistical analysis showed that the parameters that have the biggest effect on VB are the cutting speed and feed rate, respectively. |
