现国内模具型腔加工一般用仿形车床、电火花机床上加工。电火花机床因加工速度快,质量相对好,特别是复杂模具,因此应用较广泛。电火花机床加工时,一般情况下石墨电极为正极,工件(模具)为负极,当电极与工件相互靠近时,极间电压将使电解液击穿而形成火花放电,放电区把该区工件熔化,加工出所需模具形状。石墨电极在加工模具过程中,石墨会发生不同程 The domestic mold cavity processing is generally copying the lathe, EDM machine processing. EDM machine because of processing speed, quality is relatively good, especially the complex mold, so the more widely used. EDM machine processing, under normal circumstances the graphite electrode is positive, the workpiece (mold) is negative, when the electrode and the workpiece close to each other, the voltage between the electrodes will break down the formation of electrolyte spark discharge, the discharge zone to melt the workpiece parts , Processed the shape of the required mold. Graphite electrode in the process of processing the mold, graphite will occur in different ways