Processing Accuracy Of Graphite Materials

The thermal expansion coefficient of graphite materials is small, and the thermal expansion coefficient of copper materials is four times that of graphite materials. Therefore, graphite electrodes are less likely to deform than copper electrodes in electrical discharge machining, and more stable and reliable processing accuracy can be obtained. Especially when processing deep and narrow ribs, local high temperature easily bends and deforms copper electrodes, but graphite electrodes do not. For copper electrodes with large depth-to-diameter ratios, it is necessary to compensate for a certain thermal expansion value to set Corrected dimensions, while graphite electrodes are not needed.