In the years of manufacturing practice, we have summarized the EDM process of the forging die as follows. First, the choice of electrode materials In the electrical processing, we used graphite, copper, cast iron and steel as electrode materials. The best effect on large forging dies is graphite. Graphite has the following special advantages: (1) Light weight, its density is 1.6-1.9g/cm~3, and the density of copper is 8.9g/cm~3.
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