二次电极间接法(以下简称“二间法”)是利用电火花机床所具有的极性效应实现的,是电火花加工冷冲模的新方法。用电加工方法加工出二次电极和凹模,借此再用电火花方法加工凸模,这种方法具有操作简单可靠、加工效率高、质量好、间隙能方便控制等特点,是多快好省制造硬质合金冷冲模的简便可靠方法。每个工厂只要有一般电火花机床就可以用“二间法”解决硬质合金模的加工问题。用“二间法”加工复合冷冲模时,由于凸模(冲头)不需拆 The secondary electrode indirect method (hereinafter referred to as “two methods”) is the use of the polar effect of EDM machine to achieve, is a new method of EDM die. The secondary electrode and the concave die are machined by the electric machining method, so that the punch is machined by the spark discharge method. The method has the advantages of simple and reliable operation, high processing efficiency, good quality, convenient control of the gap and the like, Province manufacturing simple and reliable carbide die cold method. Each factory as long as there is a general EDM machine can use the “two methods” to solve the problem of processing cemented carbide die. With the “two law” processing compound die, the punch (punch) without demolition