Graphite has the characteristics of low electrode loss and high discharge machining removal rate, making it an excellent electrode material, gradually replacing copper electrodes, and some electrodes with complex shapes cannot be made of copper, so graphite electrodes are more and more widely used. For processing graphite electrodes, you can choose to use CNC graphite engraving machine for rapid processing. But graphite processing also has certain difficulties.
Graphite carving electrode processing
(1) The production cycle of graphite electrodes is long. The CNC machining production cycle of ordinary power graphite electrodes is about 45 days, the production cycle of ultra-high power graphite electrodes is more than 70 days, and the production cycle of graphite electrode joints that require multiple dipping is longer.
(2) High energy consumption. The production of 1t ordinary power graphite electrode requires about 6000kW h of electricity, thousands of cubic meters of gas or natural gas, and about 1t of metallurgical coke particles and metallurgical coke powder.
(3) There are many production processes. The production process includes raw material calcination, crushing and grinding, batching, kneading, molding, roasting, impregnation, graphitization and mechanical processing. Its production requires a lot of special mechanical equipment and kilns with special structures, the construction investment is relatively large, and the investment recovery period is relatively long.
(4) A certain amount of dust and harmful gases are generated in the production process, and it is necessary to take perfect ventilation and dust reduction and environmental protection measures to eliminate harmful gases.
(5) The carbonaceous raw materials such as petroleum coke and coal tar pitch required for the production are by-products of the production and processing of oil refining enterprises and coal chemical enterprises. It is difficult to fully guarantee the quality and stability of the raw materials, especially the production of high-power and ultra-high-power graphite electrodes. The use of needle coke, modified electrode pitch and special impregnant pitch with low quinoline insoluble content urgently requires the attention and active cooperation of my country’s petroleum and coal chemical processing enterprises.
Graphite special engraving machine
Although graphite is an easy-cutting material, the loss of the tool is particularly large, and the dust generated during the processing will not only wear the internal parts of the machine tool (screw, guide rail, etc.), but even threaten the physical and mental health of the operator, so the graphite material The processing requires the use of processing equipment with good sealing performance. The graphite special engraving and milling machine has good sealing performance. According to the processing characteristics of graphite materials, it is equipped with multiple protections. A multi-layer protective armor is installed on the guide rail surface to effectively protect the screw guide rail. It is equipped with a high-efficiency dust collection system. Effectively absorb graphite dust. In other respects, the castings of graphite engraving and milling machine have stable structure, high machining accuracy and long service life, which can meet the needs of heavy cutting or high-speed cutting of machine tools.
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