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Advantages of Graphite Electrodes (1)

Advantages of Graphite Electrodes (1)

The increasing complexity of mold geometry and the diversification of product applications have led to increasing requirements for the discharge accuracy of spark machines. The advantage of graphite electrodes is that they are easy to process, have a high removal rate by electrical discharge machining, and have low graphite loss. Therefore, some group based spark machine customers have abandoned copper electrodes and switched to graphite electrodes. In addition, some electrodes with special shapes cannot be made of copper, but graphite is easier to form, and copper electrodes are heavier, making them unsuitable for machining large electrodes. These factors have led to the application of graphite electrodes by some group based spark machine customers.

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Advantages of Graphite Electrodes (2)

Advantages of Graphite Electrodes (2)

Of course, after a mold factory switches from copper electrode to graphite electrode, it should first be clear how to use graphite materials and consider other relevant factors. Today, some group based spark machine customers use graphite for electrode discharge machining, which eliminates the process of mold cavity polishing and chemical polishing, but still achieves the desired surface finish. Without increasing the time and polishing process, it is impossible for copper electrodes to produce such a workpiece. In addition, graphite is divided into different grades, and using appropriate grades of graphite and spark discharge parameters for specific applications can achieve ideal machining results. If the operator uses the same parameters as copper electrodes on a spark machine using graphite electrodes, the results may be disappointing. If it is necessary to strictly control the material of the electrode, the graphite electrode can be set in a non loss state (loss less than 1%) during rough machining, but the copper electrode is not used.

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Information about graphite electrodes

Information about graphite electrodes

(1) Ordinary power graphite electrode. Graphite electrodes with a current density of less than 17A/cm2 are allowed to be used, mainly for ordinary power electric furnaces such as steelmaking, silicon smelting, and yellow phosphorus smelting.

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Classification of graphite electrodes

Classification of graphite electrodes

Ordinary power graphite electrode: It is allowed to use graphite electrode with current density lower than 17A/cm2, mainly used for ordinary power electric furnaces such as steel making, silicon smelting, yellow phosphorus smelting, etc. High power graphite electrode: It is allowed to use graphite electrodes with a current density of 18-25A/cm2, mainly used in high-power electric arc furnaces for steelmaking.

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What is a graphite electrode

What is a graphite electrode

Graphite electrode refers to a kind of high-temperature resistant graphite conductive material made from petroleum coke and pitch coke as aggregates, coal tar pitch as binder, through raw material calcination, crushing, milling, batching, kneading, molding, roasting, impregnation, graphitization, and mechanical processing. It is called artificial graphite electrode (abbreviated as graphite electrode), which is different from natural graphite electrode prepared using natural graphite as raw material.

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