Machining Requirements and Characteristics of Graphite Electrode Electromechanical

Machining Requirements and Characteristics of Graphite Electrode Electromechanical

Ⅰ. Processing requirements of the graphite electrode

1. Electrode production

The production of professional graphite electrode is mainly processed by high-speed machine tools. The stability of the machine tools should be good, the three-axis movement should be uniform and stable without vibration, and the rotation accuracy of the spindle should be as good as possible. Electrodes can also be processed on general machine tools, but the process of programming toolpaths is different from that of copper electrodes.

2. EDM electrical discharge machining

Graphite electrode is carbon electrode. What is graphite electrode used for? Because graphite has good electrical conductivity, it can save a lot of time in electrical discharge machining, which is one of the reasons why graphite is used as an electrode.

Ⅱ. The processing characteristics of graphite electrode

Industrial graphite is hard and brittle, and the tool wear is more serious during CNC machining. It is generally recommended to use cemented carbide or diamond-coated tools. During rough machining of graphite, the tool can be directly applied on the workpiece. In order to avoid chipping during finishing, the method of light knife and fast walking is often used. Generally speaking, graphite seldom collapses when the cutting depth is less than 0.2mm, and good sidewall surface quality can be obtained. The dust generated during CNC machining of graphite electrode is relatively large, which may invade the guide screw and spindle of the machine tool. This requires the graphite processing machine tool to have a corresponding device for processing graphite dust, and the machine tool must have good airtightness, because graphite is poisonous.

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