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Precautions For The Use Of Graphite Electrodes

Oct. 22, 2019

The Graphite Electrodes is mainly made of petroleum coke and needle coke, and the coal bitumen is used as a binder. It is made by calcination, compounding, kneading, pressing, roasting, graphitization and machining. It is to discharge electric energy in the form of electric arc in the electric arc furnace. The conductor that heats and melts the charge can be divided into a common power graphite electrode, a high power graphite electrode and an ultra high power graphite electrode according to its quality index.

The advantages of the graphite electrode are that the processing is easier, the discharge processing rate is high, and the graphite loss is small. Therefore, some group-based spark machine customers give up the copper electrode and switch to the graphite electrode. In addition, some special shaped electrodes can not be made of copper, but graphite is easier to form, and the copper electrode is heavier and not suitable for processing large electrodes. These factors have caused some group-based spark machine customers to apply graphite electrodes. Graphite electrodes are easier to process and process faster than copper electrodes. For example, the use of milling technology to process graphite, its processing speed is 2 to 3 times faster than other metal processing and does not require additional manual processing, while copper electrodes need to be frustrated by human hands. Similarly, if a high-speed graphite machining center is used to make the electrode, the speed will be faster, the efficiency will be higher, and no dust problem will occur. In these processes, the choice of tools and graphite with the right hardness reduces the wear loss of the tool and the breakage of the copper electrode. 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 the general case of electrical discharge machining, the processing using the graphite electrode is 58% faster than the copper electrode. As a result, the processing time is greatly reduced, and the manufacturing cost is also reduced. Graphite electrodes are different from conventional copper electrodes. Many mold shops usually have different reservations for roughing and finishing of copper electrodes, while graphite electrodes use almost the same amount of reservation, which reduces the number of CAD/CAM and machining times. For this reason alone, It is enough to greatly improve the accuracy of the mold cavity.

So what problems should the graphite electrode pay attention to during use? The Graphite Electrodes Factory will tell you.

Note on the use of graphite electrodes:

Graphite Tile

Graphite Tile

1. Damp graphite electrodes should be dried before use.

2. Remove the foam protective cap on the spare graphite electrode hole and check if the internal thread of the electrode hole is complete.

3. Clean the surface of the spare graphite electrode and the internal thread of the hole with compressed air without oil and water; avoid cleaning with steel wire or metal brush.

4. Carefully screw the joint into the electrode hole of the end of the spare graphite electrode (it is not recommended to directly insert the joint into the electrode removed from the furnace). Do not hit the thread.

5. Screw the electrode spreader (a graphite spreader is recommended) into the electrode hole at the other end of the backup electrode.

6. When lifting the electrode, pad the soft material to the bottom of the spare electrode connector to prevent the ground from damaging the joint; use the hook to extend into the lifting ring of the spreader, and lift the lifting electrode to prevent the electrode from being loosened by the B end. Take off or collide with other fixtures.

7. Hang the spare electrode above the electrode to be connected, and then align it with the electrode hole and slowly drop it; rotate the spare electrode to make the screw hook rotate down with the electrode; when the two electrode end faces are 10-20mm apart, use compressed air again. Clean both ends of the electrode and the exposed part of the joint; do not over-exact when the electrode is fully lowered at the end, otherwise the electrode hole and the thread of the joint may be damaged due to a violent collision.

8. Screw the spare electrode with a torque wrench until the end faces of the two electrodes are in close contact (the correct connection between the electrode and the joint is less than 0.05 mm).

The above is the aspect that should be noted when using graphite electrodes. If you are interested in graphite electrodes, you can contact us. Our company produces Graphite Tile, graphite electrodes and other products, which will surely satisfy you.


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