Processing method of graphite material of carbon electrode

Update:12-10-2019
Summary:

For graphite electrodes and carbon electrodes, graphite […]

For graphite electrodes and carbon electrodes, graphite is a very important raw material for production. So, what is the processing method of graphite materials? The following will mainly explain this problem briefly. Generally speaking, the processing methods of graphite materials mainly include pressure vibration method, numerical control automatic forming method and mechanical processing method.

The pressurized vibration method requires a special machine tool, and the electrode master is opposite in shape to the electrode. The graphite material and the forming tool are placed opposite each other during processing, leaving a certain gap. A working fluid mixed with water and abrasive is injected therebetween. The graphite and the forming tool are ultrasonically vibrated while passing through the working fluid. Under the action of abrasive impact, graphite is slightly stripped to the desired shape. The abrasive is SiC, B4C or diamond, and the thicker the abrasive, the faster the processing speed. The machine tool is processed by sealing and water curtain, which is suitable for EDM forming in mass production.

CNC automatic forming method requires a special graphite electrode forming machine, which adopts numerical control mode and has automatic tool changing device, which can accommodate multiple tools. In order to improve the processing environment, the graphite electrode is surrounded by a water curtain to prevent the graphite dust from being scattered. Alternatively, the wet processing method can be used to prevent the tool from being worn and the graphite dust from scattering by the water-soluble cutting fluid. The machine tool has a high-performance filter device, which can separate the cutting fluid and graphite chips, and can ensure continuous processing for a long time. It is an ideal special equipment for graphite electrode processing and is suitable for electrode processing of molds.

The machining method is the main method adopted by the domestic general mold production unit. Graphite materials can be processed by turning, milling, drilling and grinding. In addition, graphite materials are prone to fly ash during machining, which adversely affects processing equipment and operators.