The advantages of graphite electrode are easy to process, high removal rate of discharge machining, and small graphite loss. Therefore, some customers of group based spark machine give up copper electrode and use graphite electrode. In addition, some special shape of the electrode can not be made of copper, but graphite is easier to shape, and copper electrode is heavy, not suitable for processing large electrodes, these factors have caused some group based spark machine customers to use graphite electrode.
Graphite has the following incomparable high quality characteristics of copper:
Machining speed: high speed milling rough machining is 3 times faster than copper; High speed milling finishes 5 times faster than copper
Good machinability, can realize complex geometric modeling
Light weight, less than 1/4 of the density of copper, electrode easy to grip
The number of individual electrodes can be reduced because they can be bundled into a composite electrode
Good thermal stability, no deformation and no machining burr