Process Of Machined Graphite Parts

- Sep 09, 2017-

     Continuous casting graphite mold for copper, platinum, gold, silver, other non-ferrous metals and steel, stainless steel and other continuous casting molds. It has good thermal conductivity, high temperature self-lubricating, good wear resistance, high mechanical strength characteristics. According to the casting method can be divided into horizontal continuous casting mold or vertical (UP) continuous casting mold two. According to the casting materials are: brass continuous casting mold, copper continuous casting mold, gold, silver, platinum and other jewelry mold casting, stainless steel mold 4. According to the shape of the casting products have round bar mold, hollow pipe mold, special-shaped mold 3 kinds. The single hole graphite mold and porous graphite mold were divided by the number of holes.Machined Graphite Parts
     Graphite electrode material is different from copper, according to the size of granularity, it is divided into various grades. According to the quality requirements of the mold, material selection is the key, it directly affects the electrical processing speed, surface roughness, processing precision and so on. Machined Graphite Parts
     Therefore, according to the different processing situation, should choose the graphite electrode material reasonably. The pulse width is the duration of the voltage pulse at both ends of the discharge gap added to the electrode and the workpiece. Pulse width to determine the pulse energy of a single pulse, with the increase of pulse width, the more the corrosion of the workpiece, the deeper the corrosion pits, the greater the surface roughness of workpiece. The larger the pulse width, the lower the electrode loss. When the current is constant, the pulse width is increased and the processing speed decreases. Because the pulse width is too long, not normal discharge processing, but in the workpiece surface ablation, processing instability.Machined Graphite Parts
     The pulse interval is the interval between two voltage pulses, which changes the energy of each discharge in the pulse interval and the erosion of the workpiece, while the pulse interval affects the processing speed and the processing stability, the surface roughness is almost constant, and the processing speed and the electrode loss change. Machined Graphite Parts
     The pulse interval increases, the processing speed is reduced, the pulse interval reaches a certain value, if the pulse interval increases, the electrode loss will increase, because the pulse interval increases, the ionization of the polar medium is quite sufficient, which is advantageous to form the covering layer, thus the electrode loss decreases. But the pulse interval is too small, the ionization between the electrode and the workpiece is not sufficient, it may produce ablation phenomenon and process instability on the electrode and workpiece surface.Machined Graphite Parts