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高纯石墨(上海碳素厂生产X-600,X-650等)用作工具电极来加工成型模具型腔,与紫铜电极相比,石墨电极比重只有紫铜的1/5,而且石墨电极可以由切削加工或振动成型,加工比紫铜方便,石墨电极电加工成型模具型腔时,其本身的损耗也小。上海地区许多工厂如上无二厂,华通开关厂等均在应用石墨电极方面取得相当成熟的经验。在机加工石墨电极时应特别注意爆角的问题。为此可以采用以下两种方法。第一种方法:铣刀从始端加工到近尾端
High-purity graphite (Shanghai Carbon Factory produces X-600, X-650, etc.) is used as a tool electrode for processing the mold cavity. Compared with the copper electrode, the graphite electrode has a specific gravity of 1/5 of that of copper and the graphite electrode can be made of Cutting or vibration molding, processing more convenient than copper, graphite electrode processing mold cavity, its own loss is small. Many factories in Shanghai, as above, Wumart, Hua Tong switchgear and so on, have obtained quite mature experience in the application of graphite electrodes. When machining graphite electrodes, special attention should be given to the problem of explosion angle. The following two methods can be used for this purpose. The first method: milling cutter from the beginning to the end of finishing