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Material Properties Of High Power Graphite Electrodes

Released on May. 06, 2019

1.CNC processing speed, high machinability, easy to trim

The graphite machine has a fast processing speed of 3-5 times of copper electrode, and the finishing speed is particularly outstanding, and its strength is very high. For ultra-high (50-90mm), ultra-thin (0.2-0.5mm) Graphite Electrode, it is not easy to process. Deformation. Moreover, in many cases, the product needs to have a good grain surface effect, which requires that the electrode be made as an integral public electrode as possible, and the overall male electrode is produced with various invisible clear angles. Due to the easy trimming characteristics of graphite, This problem is easily solved and the number of electrodes is greatly reduced, while the copper electrode cannot.

2. Light weight and low cost

In the manufacturing cost of a set of molds, the CNC machining time, EDM time, and High Power Graphite Electrodes loss of the electrode account for the majority of the total cost, which are determined by the electrode material itself. Compared with copper, graphite has a machining speed and EDM speed of 3 to 5 times that of copper. At the same time, the extremely low wear characteristics and the fabrication of the overall male graphite electrode can reduce the number of electrodes and reduce the consumables and machining time of the electrode. All of this can greatly reduce the cost of making the mold.

3. Fast EDM forming, small thermal expansion and low loss

Since graphite is more conductive than copper, its discharge rate is faster than copper, which is 3 to 5 times that of copper. And it can withstand a large current when discharging, and it is more advantageous when the electric spark rough machining. At the same time, the graphite weight is 1/5 times that of copper under the same volume, which greatly reduces the load of EDM. It is very advantageous for making large electrodes and overall male electrodes. The sublimation temperature of graphite is 4200 ° C, which is 3 to 4 times that of copper (the sublimation temperature of copper is 1100 ° C). At high temperatures, the deformation is minimal (1/3 to 1/5 of copper under the same electrical conditions) and does not soften. The discharge energy can be transferred to the workpiece efficiently and with low cost. Since the strength of graphite is enhanced at a high temperature, the discharge loss can be effectively reduced (the graphite loss is 1/4 of that of copper), and the processing quality is ensured.

High Power Graphite Electrodes

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