NEWS CENTER

1: The increasing complexity of mold geometry and the diversification of product applications have led to higher and higher requirements for the discharge precision of spark machines. The advantages of graphite electrodes are that they are easier to process, have high discharge machining removal rates, and have small graphite losses. 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 shape, and the copper electrodes are heavier and not suitable for machining large electrodes. These factors have caused some group-based spark machine customers to apply graphite electrodes.

2: Graphite electrodes are easier to machine, and the processing speed is significantly faster than copper electrodes. For example, using a milling process to process graphite, the processing speed is 2-3 times faster than other metal processing and does not require additional manual processing, while copper electrodes require manual grinding. Similarly, if a high-speed graphite machining center is used to manufacture electrodes, it will be faster, more efficient, and will not produce dust problems. During these machining processes, choosing tools with the right hardness and graphite can reduce tool wear and tear and copper damage. If the milling time of graphite electrode and copper electrode graphite electrode is specifically compared, graphite electrode is 67% faster than copper electrode, and in general electric discharge machining, the machining with graphite electrode is 58% faster than that with copper electrode. As a result, the machining time is greatly reduced, and the manufacturing cost is also reduced.

3: The design of graphite electrodes is different from that of traditional copper electrodes. Many mold factories usually have different reservations in roughing and finishing of copper electrodes, while graphite electrodes use almost the same reservation, which reduces the number of CAD/CAM and machining. This reason alone is enough to greatly improve the accuracy of mold cavities.

Of course, after a mold factory switches from copper electrodes to graphite electrodes, it should first be clear how to use graphite materials and consider other related 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 expected surface finish. Without increasing the time and polishing process, it is impossible for copper electrodes to produce such workpieces. In addition, graphite is divided into different grades, and the ideal machining effect can be achieved by using the appropriate grade of graphite and EDD parameters in a specific application. If the operator uses the same parameters as the copper electrode on a spark machine using graphite electrodes, then the results must be disappointing. If the material of the electrode is to be strictly controlled, the graphite electrode can be set to a non-loss state (loss less than 1%) during roughing, but the copper electrode is not used.

Graphite has the following high-quality properties unmatched by copper:

Machining speed: high-speed milling roughing is 3 times faster than copper; high-speed milling finishing is 5 times faster than copper

Good machinability, enabling complex geometric modeling

Light weight, less than 1/4 of the density of copper, the electrode is easy to clamp

The number of individual electrodes can be reduced because they can be bundled into combined electrodes

Good thermal stability, no deformation, no processing burrs