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Ultra-high power graphite electrode:
Graphite electrodes is mainly made of petroleum coke and needle coke as refractory raw materials, and coal tar pitch as a binder, which is prepared by calcining, compounding, kneading, pressing, calcining, graphitizing and machining and is released in an electric arc furnace Electrical energy on the charge heating and melting of the conductor.
Ultra-high-power graphite electrode are graphite electrodes that allow current densities greater than 25 A / cm2 and are mainly used in ultra-high-power steelmaking electric arc furnaces.
HP Graphite electrode advantages:
(1) Processing speed is faster: Under normal circumstances, graphite machining speed can be 2 to 5 times faster than copper; and discharge processing speed is 2 to 3 times faster than copper;
(2) The material is more difficult to deform: obvious advantages in the thin-walled electrode processing.
(3) lighter weight: the density of graphite is only 1/5 of copper, large electrode for electrical discharge machining, can effectively reduce the machine tool (EDM) burden; more suitable for large mold applications.
According to the use of different power and current, using different refractory raw materials and production technology, can be divided into ordinary power graphite electrodes, high power graphite electrodes, ultra-high power graphite electrodes. Graphite electrode has good electrical properties and chemical stability, high mechanical strength at high temperature, low impurity content, good vibration resistance, is a good conductor of heat and electricity.
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Graphite electrodes are widely used in steel-making electric arc furnaces, refining furnaces, ferroalloy production, industrial silicon, yellow phosphorus, corundum and other submerged arc furnaces and other arc furnaces that produce high temperatures.
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HP Graphite electrode has good electrical properties and chemical stability, high mechanical strength at high temperatures, less impurities, good vibration resistance. It is a good conductor of heat and electricity.
Article Source: HP Graphite Electrode
Company name: Henan Xinmi Changxing Refractory Materials Co.,Ltd
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Website:http://www.chinafirebrick.com/
Advantages of graphite electrodes
(1) The increasing complexity of mold geometries and the diversification of product applications have led to higher and higher requirements for the discharge accuracy of spark machines. The advantages of graphite electrodes are easier processing, high EDM removal rate, and low graphite loss. Therefore, some group-based spark machine customers have abandoned copper electrodes and switched to graphite electrodes. In addition, some special-shaped electrodes cannot be made of copper, but graphite is easier to mold, and copper electrodes are heavier and are not suitable for processing large electrodes. These factors have caused some group-based spark machine customers to use graphite electrodes.
(2) Graphite electrodes are easier to process, and the processing speed is significantly faster than copper electrodes. For example, milling graphite is used to process graphite, its processing speed is 2 to 3 times faster than other metal processing and no additional manual processing is required, while copper electrodes need to be frustrated by hand. Similarly, if a high-speed graphite machining center is used to manufacture the electrode, the speed will be faster, the efficiency will be higher, and the problem of dust will not occur. In these processes, the selection of tools and graphite with appropriate hardness can reduce the wear of the tools and the damage of the copper electrodes. If the milling time of the graphite electrode and the copper electrode is specifically compared, the graphite electrode is 67% faster than the copper electrode. In general, the discharge processing using the graphite electrode is 58% faster than using the copper electrode. In this way, the processing time is greatly reduced, and the manufacturing cost is also reduced.
(3) The design of graphite electrodes is different from traditional copper electrodes. Many mold makers usually have different reserves for roughing and finishing of copper electrodes, while graphite electrodes use almost the same reserves, which reduces the number of CAD / CAM and machining processes. For this reason alone, It is enough to greatly improve the accuracy of the mold cavity.
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