电火花工艺用于型孔加工已十分普遍,在锻模型腔加工中也发挥了很好的作用,与仿形铣比,效率高成本低,经济效果显著。由于脉冲电源的发展,电火花也大量用于加工压印模。但在塑压模型腔加工方面进展不大。原因是塑压模本身要求高,型腔比压印模深得多,比锻模光洁度和精度高得多,而且起模斜度小。所以,精加工难度大是其中的关键。从70年代末, EDM for the hole processing has been very common in the forging cavity processing also played a very good role, and profiling milling, high efficiency and low cost, the economic effect is significant. Due to the development of pulse power, EDM is also widely used in processing stamping die. However, little progress has been made in plasticizing the mold cavity. The reason is that the plastic mold itself requires high, the cavity is much deeper than the stamping die, forging finish and precision is much higher than the forging die, and the mold taper is small. Therefore, the difficulty of finishing is one of the key. From the late 70s,