The Advantages Of The Graphite Electrode

　　EDM with graphite electrode, also known as copper

　　1: the diversification of die geometry becomes more and more complex and product applications require discharge to spark machine accuracy is more and more high. The advantages of the graphite electrode is easy processing, electrical discharge machining removal rate is high, the graphite loss is small, therefore, part qunji spark machine customers abandoned copper electrode with graphite electrode. In addition, some special shape electrode can not use copper manufacturing, but graphite is easy to shape, and the copper electrode is heavy, not suitable for processing large electrode, these factors have caused some qunji spark machine client application of graphite electrode.

　　2: graphite electrode is easy to processing, and the processing speed is obviously faster than the copper electrode. For example, the milling of graphite, its processing speed than other metal processing speed of 2 ~ 3 times without the need for manual processing of additional, while copper electrode is needed and grinding. Similarly, if the high- speed machining center with graphite graphite electrode.

　　Fabrication of electrodes, speed will be faster, more efficiently, but also does not produce dust problem. In the process, select the hardness appropriate tools and graphite can reduce tool wear and breakage of copper consumption. If the milling time the specific comparison of graphite electrode and the copper electrode graphite electrode, graphite electrode with copper 67%, electrical discharge machining in the general case, processing using graphite electrode than the copper electrode fast 58%. In this way, the processing time is greatly reduced, but also reduce the cost of manufacture.

　　3: Design of graphite electrode and the traditional copper electrodes of different. Many mold factory usually reserve different on copper electrode rough machining and finish machining, and the graphite electrode is reserved for use almost the same amount, which reduces the number of CAD/CAM and machine processing, for this reason alone, is enough to improve the precision of die cavity in the very great degree. Of course, the mold factory by copper electrode conversion of graphite electrode, first of all should be clear is how to use graphite materials and other related factors.

　　Now some qunji spark machine customers using graphite with electric discharge machining, which eliminates the mold polishing and chemical polishing process still can achieve the desired surface finish. If not increase the time and polishing process, the copper electrode can not produce such artifacts. In addition, graphite is divided into different grades, the use of appropriate levels in the specific application of graphite and discharge parameters in order to achieve the ideal processing effect, if the operator parameters using the same and copper electrode in EDM with graphite electrode, then the result will be disappointing. If you want to strictly control the electrode material, the graphite electrode in the rough on the non loss state (loss of less than 1%), but not use copper electrode.

　　Graphite has excellent characteristics of the copper incomparable:

　　Processing speed: high speed milling roughing a copper piece 3 times; high speed milling of a copper block 5 times

　　Machinability is good, can realize the geometric modeling of complex

　　Light weight, insufficient density copper 1/4, easy electrode clamp

　　Can reduce the number of single electrode, because may be tied into combination electrode

　　Good thermal stability, no deformation and no machining burrs