uhp 450 graphite electrode
Why use uhp 450 graphite electrode?
Today, in Europe, where manufacturing technology is leading, more than 90% of the uhp 450 graphite electrode materials used by mold companies use graphite. But in China, most mold companies still choose copper as the main material for uhp 450 graphite electrode.
According to the characteristics of graphite materials, the following comprehensive analysis of the advantages of EDM.
Graphite material has fast electric spark discharge speed and high efficiency.
Uhp 450 graphite electrode loss The uhp 450 graphite electrode has the characteristics of being able to withstand high current conditions. In addition, under the appropriate roughing conditions, the erosion products and working fluid produced during the processing of carbon-containing steel workpieces are at high temperatures. The carbon particles in the resulting decomposition products will adhere to the surface of the uhp 450 graphite electrode to form a protective layer under the effect of the polarity effect, which ensures the uhp 450 graphite electrode in the rough processing. Very small loss, even “zero loss” 3 Surface quality The particle diameter of graphite material directly affects the surface roughness of EDM, the smaller the diameter, the lower the surface roughness value.
A few years ago, graphite materials with a particle diameter of φ5μm were used, and the best surface for EDM can only reach VDI18 (Ra0.8μm). Nowadays, the particle diameter of graphite materials can reach within φ3μm, and the best surface for EDM can be stably achieved. VDI12 (Ra0.4μm) or finer grade. Machining accuracy The thermal expansion coefficient of graphite material is small, and the thermal expansion coefficient of copper material is 4 times that of graphite material. Therefore, in electrical discharge machining, uhp 450 graphite electrode is less prone to deformation than copper uhp 450 graphite electrode, and a more stable and reliable machining accuracy of 5uhp can be obtained. 450 graphite electrode weight Graphite material is less dense than copper, and the weight of the uhp 450 graphite electrode of the same volume is only 1/5 of that of the copper uhp 450 graphite electrode.
It can be seen that the larger uhp 450 graphite electrode is very suitable for using graphite material, which greatly reduces the load on the spindle of the EDM machine tool. The uhp 450 graphite electrode will not cause problems such as inconvenience in clamping and yaw displacement during processing due to its heavy weight. It can be seen that it is meaningful to use uhp 450 graphite electrode in the processing of large molds.
Difficulty in making uhp 450 graphite electrode
The machining performance of graphite material is good, and the cutting resistance is only 1/4 of copper. Under the correct processing conditions, the efficiency of milling uhp 450 graphite electrode is 2 to 3 times that of copper uhp 450 graphite electrode. The uhp 450 graphite electrode is easy to clear the corners, and the workpieces that are usually completed by multiple uhp 450 graphite electrodes can be designed into a whole uhp 450 graphite electrode for processing. The 7uhp 450 graphite electrode has good adhesion to the installation and use of graphite materials. The method of using conductive glue to bond graphite to the fixture for milling uhp 450 graphite electrode and electrical discharge machining can eliminate the process of machining screw holes on the uhp 450 graphite electrode material and save working time.
Copper material is a non-renewable resource, and the price trend will become more and more expensive, while the price of graphite material tends to stabilize. In recent years, the price of copper materials has continued to rise, and major graphite manufacturers continue to improve the process of making graphite to make it more cost-effective.