Pyrolytic Graphite EDM Graphite Blocks for Sale

EDM graphite, also known as graphite for EDM, is a new type of material, which is now more and more widely used in the precision mold processing industry. At present, in mold processing plants in developed European countries, more than 90% of mold processing electrode materials are graphite. Copper, the once dominant electrode material, has almost lost its advantages compared with graphite electrodes. Why is this so? Because graphite has a huge advantage as an electrical discharge material for EDM, since spark oil also contains C atoms, during electrical discharge machining, the high temperature causes the C atoms in the spark oil to be decomposed, thereby forming a protective film on the surface of the EDM graphite electrode , The loss of graphite electrode is compensated, so the loss of graphite electrode is very small, so the service life is long.

Advantages of EDM graphite electrode:

1. The processing speed is faster. Under normal circumstances, the machining speed of graphite can be 2-5 times faster than copper, and the discharge speed is 3-5 times faster than copper.

2. The material is not easy to deform, and it has obvious advantages in the processing of thin rib materials. The softening point of copper is about 1000 degrees, and it is easily deformed by heating. The sublimation temperature of graphite is 3650 degrees, and the thermal expansion coefficient is only 1/30 of copper.

3. Lighter weight. The density of graphite is only 1/5 of that of copper. When large electrodes are used for electrical discharge machining, it can effectively reduce the burden on machine tools (EDM), and is more suitable for large mold applications.

4. Discharge consumption is smaller. Since the spark oil also contains C atoms, during electrical discharge machining, the high temperature causes the C atoms in the spark oil to be decomposed, which in turn forms a protective film on the surface of the graphite electrode, which compensates for the loss of the graphite electrode.