Processing method of graphite material for carbon electrode
In fact, for graphite electrodes and carbon electrodes, graphite is a very necessary raw material for production. So, what is the processing method of graphite material, the following will briefly explain this problem. Generally speaking, the processing methods of graphite materials mainly include pressure vibration method, NC automatic forming method and mechanical processing method.
The pressurized vibration method requires a special machine tool, and the electrode master mold has the opposite shape to the electrode. The graphite material and the forming tool are relatively placed during processing, leaving a certain gap. A processing fluid mixed with water and abrasive is poured into it. The graphite and the forming tool are subjected to ultrasonic vibration while passing through the processing fluid. Under the impact of the abrasive, the graphite is slightly peeled into the required shape. The abrasive is SiC, B4C or diamond. The coarser the abrasive, the faster the processing speed. When the machine tool is working, it adopts sealed type and water curtain type for processing, which is suitable for EDM processing for mass production.
The NC automatic forming method requires a special graphite electrode forming machine. It adopts the NC mode and has an automatic tool changing device, which can accommodate multiple tools. In order to improve the processing environment, the periphery of the processed graphite electrode is surrounded by a water curtain to prevent graphite dust from being scattered around. In addition, the wet machining method can also be used to prevent the tool from being worn and the graphite dust from being scattered by the water-soluble cutting fluid. The machine tool has a high-performance filtering device that can separate cutting fluid from graphite chips and ensure continuous processing for a long time. It is an ideal special equipment for graphite electrode processing and suitable for mold electrode processing.
The machining method is the main method adopted by domestic general mold production units. Graphite materials can be processed by turning, milling, drilling and grinding. In addition, graphite materials are prone to fly dust during mechanical processing, which adversely affects processing equipment and operators.
