Where can I collect high-purity graphite blocks in Xilingol League in 2022 (pay while loading)
Advantages of graphite electrodes: The increasing complexity of the mold geometry and the diversification of product applications lead to higher and higher requirements for the degree of discharge of the spark machine. The advantage of graphite electrode is that it is easier to process, the removal rate of EDM is high, and the loss of graphite is small. Therefore, some group spark machine customers have given up copper electrodes and switched to graphite electrodes. In addition, some special-shaped electrodes cannot be made of copper, but graphite is easier to form, and copper electrodes are heavy, which is not suitable for processing large electrodes. These factors have led some group-based spark machine customers to use graphite electrodes.
Graphite plates are easier to machine and significantly faster than copper electrodes. For example, using milling technology to process graphite, the processing speed is two or three times faster than other metal processing and does not require additional manual processing, while copper electrodes require manual grinding.
Likewise, if a high-speed graphite machining center is used to manufacture the electrodes, it is faster and more efficient without dusting problems. In these processes, choosing tools and graphite with appropriate hardness can reduce tool wear and copper damage. If you specifically compare the milling time of graphite and copper electrodes, graphite electrodes are 67% faster than copper electrodes. In general, graphite electrodes process 5% faster than copper electrodes in EDM. eighteen. As a result, processing time is greatly reduced, which also reduces manufacturing costs. The design of graphite plates is different from traditional copper electrodes. Many mold factories usually leave different allowances for rough machining and finishing of copper electrodes, while graphite electrodes use almost the same allowance, thus reducing the number of CAD/CAM and machining. For this reason alone, it is enough to improve the accuracy of the mold cavity to a large extent. Of course, after the mold factory changes from copper electrodes to graphite electrodes, it must first clarify how to use graphite materials and other related factors must also be considered. Today, some group-based EDM customers use graphite as the electrode for EDM, which saves the cavity polishing and chemical polishing processes, but still achieves the expected surface finish. It is impossible to manufacture such workpieces with copper electrodes without adding time and polishing steps. In addition, graphite is also divided into different grades. Only by using appropriate graphite grades and EDM parameters in specific applications can the ideal processing effect be achieved. If an operator uses the same parameters on a spark machine with graphite electrodes as copper electrodes, the results must be disappointing. For tight control of the electrode material, the graphite plate can be set to wear-free (less than 1% loss) during roughing, but copper electrodes are not used. Graphite has the following high-quality characteristics that copper cannot match: Processing speed: high-speed milling roughing is three times higher than copper block; high-speed milling finishing is five times higher than copper block, good machinability, complex geometry, lightweight, and less density than copper A quarter of the electrode is easy to clamp, which can reduce the number of individual electrodes, because it can be bundled to make a composite electrode, with good thermal stability, no deformation, and no processing burrs.
The chemical properties of elemental carbon are relatively stable at room temperature, insoluble in water, dilute acid, dilute alkali, and organic solvents; react with oxygen at different high temperatures to form carbon or carbon monoxide; among halogens, only fluorine can directly react with elemental carbon; Under heating, elemental carbon is more easily oxidized by acid; at high temperature, carbon can also react with many metals to form metal carbides. Carbon is being reduced and metals can be smelted at high temperatures. Graphite is a crystalline mineral of carbonaceous elements, and its crystalline framework is a hexagonal layered structure. The distance between each network layer is 340 pm, and the distance between carbon atoms in the same network layer is 142 pm; it belongs to the hexagonal crystal system with complete layered cleavage. The cleavage plane is mainly composed of molecular bonds, has a weak attraction to molecules, and is naturally buoyant. Graphite, diamond, carbon sixty, and carbon nanotubes are all simple substances of carbon, which are allotropes of each other.
Damp graphite electrodes should be dried before use.
Where can I collect high-purity graphite blocks in Xilingol League in 2022 (pay while loading)