Application Of Graphite Dies In Machining

- Oct 25, 2017-

NC machining speed, high cutting, easy to repair graphite machine processing speed, for the copper electrode $number times, finishing speed is particularly prominent, and its strength is very high, for ultra-high (50~90mm), ultra-thin (0.2~0.5mm) of the electrode, processing difficult deformation.Graphite Dies 

And in many cases, products need to have a good surface effect, this requires that when making electrodes as far as possible to make the whole common electrode, and the whole public electrode when the production of a variety of hidden angle, because of the easy to repair the characteristics of graphite, making the problem is easy to solve, and greatly reduce the number of electrodes, but the copper electrode can not do.Graphite Dies

Because the conductivity of graphite is better than that of copper, it is quicker to discharge than copper, which is $number times of copper. and its discharge can withstand a larger current, EDM roughing more favorable. At the same time, the same volume, graphite weight of copper 1/5 times times, greatly reduce the EDM load. For the production of large electrodes, the overall common electrode has an advantage.Graphite Dies

The sublimation temperature of graphite is 4,200 ℃, which is $number times of copper (the sublimation temperature of copper is 1100 ℃). At high temperatures, the deformation is minimal (the 1/3~1/5 of copper under the same electrical conditions), does not soften. Discharge energy can be transmitted to the workpiece efficiently and in low consumption. Because the strength of graphite is enhanced at high temperature, it can effectively reduce the discharge loss (1/4 of the graphite loss is copper) and ensure the processing quality.Graphite Dies

Graphite in roughing tool can be directly in the workpiece up and down knife, finishing to avoid the collapse of the angle, fragmentation occurs, often using a light knife fast way to process. In general, the graphite in the cut depth less than 0.2mm in the case of rare collapse, but also to obtain a better surface quality of the side wall. Graphite electrode CNC Machining When the dust is relatively large, may invade the machine tool guide screw and spindle, etc., which requires graphite processing machine tool has the corresponding treatment of graphite dust device, machine tool tightness is also better, because the graphite is poisonous.Graphite Dies