In the 1960s, as a copper electrode materials are widely used, the utilization rate of about 90%, graphite, only about 10%; the 21st century, more and more users began to choose as a graphite electrode materials in Europe, more than 90% The graphite electrode materials. Copper, which had been dominant electrode materials, graphite electrodes and its advantages compared to almost disappear. What led to this dramatic change? Of course, is that a lot of advantages Graphite electrodes.
(1) processing speed: Generally, the graphite machining copper faster than the speed of 2 to 5 times; and the discharge of copper faster than the speed of processing two or three times;
More information is not easy to deformation: thin bars in the processing of the electrode on the obvious advantage; copper in the softening point of about 1000 degrees, vulnerable to heat resulting from deformation; graphite sublimation temperature of 3650 degrees; coefficient of thermal expansion of the copper is only 1 / 30.
(2) lighter weight: the density of graphite only copper 1 / 5, to carry out large-scale EDM electrode, the machine can effectively reduce (EDM) of the burden; more suitable for large-scale die in the application.
(3) consume a smaller discharge; sparks as a result of oil also contains C atoms in the discharge process, heat the oil in the spark leading to C atoms are broken out in favor of the graphite electrode surface to form a protective layer, the compensation of graphite electrodes Wear and tear.
(4) no burr; copper electrode in the process is completed, be carried out by hand to remove the burr dressing, and the graphite processing glitch did not save a great deal of cost, at the same time it easier to automate production;
(5) graphite easier for grinding and polishing; graphite as a result of cutting resistance of copper is only 1 / 5, more easily carry out the hand-grinding and polishing;
(6) material costs lower, more stable prices; in recent years due to rising copper prices, now isotropic graphite copper price lower than the same size, the universality of Japanese carbon graphite products, the price of copper than the price of low - 30% to 60%, and price stability, short-term price fluctuations is very small.
It is this unparalleled advantages, gradually replacing copper graphite EDM electrodes into the material of choice
(1) processing speed: Generally, the graphite machining copper faster than the speed of 2 to 5 times; and the discharge of copper faster than the speed of processing two or three times;
More information is not easy to deformation: thin bars in the processing of the electrode on the obvious advantage; copper in the softening point of about 1000 degrees, vulnerable to heat resulting from deformation; graphite sublimation temperature of 3650 degrees; coefficient of thermal expansion of the copper is only 1 / 30.
(2) lighter weight: the density of graphite only copper 1 / 5, to carry out large-scale EDM electrode, the machine can effectively reduce (EDM) of the burden; more suitable for large-scale die in the application.
(3) consume a smaller discharge; sparks as a result of oil also contains C atoms in the discharge process, heat the oil in the spark leading to C atoms are broken out in favor of the graphite electrode surface to form a protective layer, the compensation of graphite electrodes Wear and tear.
(4) no burr; copper electrode in the process is completed, be carried out by hand to remove the burr dressing, and the graphite processing glitch did not save a great deal of cost, at the same time it easier to automate production;
(5) graphite easier for grinding and polishing; graphite as a result of cutting resistance of copper is only 1 / 5, more easily carry out the hand-grinding and polishing;
(6) material costs lower, more stable prices; in recent years due to rising copper prices, now isotropic graphite copper price lower than the same size, the universality of Japanese carbon graphite products, the price of copper than the price of low - 30% to 60%, and price stability, short-term price fluctuations is very small.
It is this unparalleled advantages, gradually replacing copper graphite EDM electrodes into the material of choice
