Apr. 17, 2020
Graphite Electrode mainly uses petroleum coke and needle coke as raw materials, coal pitch as binder, and is made by calcination, batching, kneading, pressing, roasting, graphitization, and machining. The conductor that heats and melts the furnace charge can be divided into ordinary power graphite electrode, high power graphite electrode, and ultra-high power graphite electrode according to its quality index. What are the advantages of graphite electrodes? Let's take a look at the Graphite Electrode Suppliers.
The increasing complexity of mold geometry and the diversification of product applications have led to higher and higher requirements for the discharge accuracy of spark machines. The advantages of the graphite electrode are that it is easier to process, the discharge removal rate is high, and the graphite loss is small. Therefore, some spark machine customers have abandoned the copper electrode and used the graphite electrode. In addition, some electrodes with special shapes cannot be made of copper, but graphite is easier to form, and the copper electrode is heavier, which is not suitable for processing large electrodes. These factors have caused some spark machine customers to use graphite electrodes.
Industrial Graphite Electrodes are easier to process, and the processing speed is significantly faster than copper electrodes. For example, the milling process is used to process graphite, which is 2 to 3 times faster than other metal processing and does not require additional manual processing, and the copper electrode requires manual grinding. Similarly, if a high-speed graphite machining center is used to manufacture the electrode, the speed will be faster and the efficiency will be higher, and there will be no dust problem. In these processes, choosing tools and graphite with appropriate hardness can reduce the wear of the tool and the damage of the copper male. If you compare the milling time of graphite electrode and copper electrode graphite electrode, graphite is 67% faster than the copper electrode. In general discharge processing, the processing with the graphite electrode is 58% faster than that with the copper electrode. In this way, the processing time is greatly reduced, and the manufacturing cost is also reduced.
The design of graphite electrodes is different from traditional copper electrodes. Many mold companies usually have different reserves for roughing and finishing of copper electrodes, while graphite electrodes use almost the same reserve, which reduces the number of cad/cam and machine processing. For this reason alone, It is enough to greatly improve the accuracy of the mold cavity.
Of course, after the mold company switched from copper electrodes to graphite electrodes, it should first be clear how to use graphite materials and consider other related factors. Today, some spark machine customers use graphite for electrode discharge machining, which eliminates the process of mold cavity polishing and chemical polishing, but still achieves the expected surface finish. Without increasing the time and polishing process, it is impossible for the copper electrode to produce such a workpiece. In addition, graphite is divided into different grades. Only using appropriate grades of graphite and electrical discharge parameters under specific applications can achieve the desired processing effect. If the operator uses the same parameters as the copper electrode on the spark machine using graphite electrodes, Then the result is definitely disappointing. If you want to strictly control the material of the electrode, you can set the graphite electrode in a non-depleted state (loss is less than 1%) during roughing, but the copper electrode is not used.
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