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在晶体管或可控硅式电火花成形机床上用石墨或铜作电极加工钢工件时,可采用粗规准(低频宽脉冲)加工,生产率高且电极损耗小;但使用钢电极加工钢工件即“钢打钢”时,因极易拉弧烧伤,就不可使用粗规准,只能进行中、精规准加工,生产率低且电极损耗大,因此,在使用“钢打钢”加工冲模(即穿孔加工)时,一般需要对凹模进行充分的预加工,以尽量减少电加工量。采取在钢电极端部镶上石墨的方法可以大大地改善上述状况,用镶拼的石墨作为辅助电
In the transistor or silicon controlled EDM machine with graphite or copper for electrode processing of steel parts, the use of rough standard (low-bandwidth pulse) processing, high productivity and small electrode loss; but the use of steel electrode processing of steel parts that “Steel hit steel”, due to easy arc pull burn, you can not use the coarse standard, only in the fine standard processing, low productivity and electrode loss, therefore, the use of “steel hit steel” processing die That is, perforated processing), the general need for full preform die, in order to minimize the amount of electrical processing. Taking the method of inlaying graphite at the end of the steel electrode can greatly improve the above-mentioned situation, and use the inlaid graphite as auxiliary electricity