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晶体管或可控硅式电火花成型机床在用石墨或铜做电极加工钢工件时,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,就不可使用粗规准,因其极易拉弧烧伤,只能进行中、精加工,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,需要对凹模进行充分的预加工,尽量减少电加工量,这对于复杂型孔十分不便,但是,不这样做就会使电加工的工时成倍的延长。然而采取在钢电极端部镶上石墨的方法则可以大大的改善加工状况。用镶拼的
Transistor or SCR silicon EDM machine tools in the use of graphite or copper 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 the steel ”, you can not use the coarse standard, because of its extremely easy arc burns, only in, finishing, low productivity and electrode loss. Therefore, the use of “steel hit steel” processing die (ie, perforation processing), the need for full preform die, try to reduce the amount of electrical processing, which is very inconvenient for complex holes, but do not do so will make the electricity The processing time is exponentially extended. However, the method of applying graphite to the end of the steel electrode can greatly improve the working condition. Use the mosaic