1. Low density and low quality
The density of graphite is only 1/5 of that of copper, and graphite electrodes can greatly reduce the load during spark machining.
2. Smaller thermal expansion rate
The thermal expansion rate of graphite is 1/4 of that of copper, which can effectively reduce the deviation caused by the heating deformation of the electrode.
3. Good processability
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The cutting resistance of graphite materials is relatively small, and its processing efficiency is about twice to three times that of copper. The use of graphite materials can reduce the processing of electrodes.
4. It is easier to realize the processing of thin rib styles
The processing of copper electrodes produced by cutting heat is prone to thermal deformation. Because of the plastic nature of the material, elastic deformation will easily occur when processing thin ribs, causing processing shock; while graphite itself is sintered from particles, which is heat- resistant and brittle. Features, can reduce processing deformation and vibration.
5. Outstanding electrical discharge roughing efficiency
The melting point of copper is &#;, and the temperature at the moment of discharge can reach &#;. The copper electrode is easy to wear, while the graphite will sublime at &#;. Therefore, the graphite electrode is easier to withstand large currents and can also complete more micro Electrode consumption.
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