Mirror spark machine

1, About PGM powder solution
Conductive powder into the discharge gap, equivalent to the access between the two poles of small conductors, but also make the discharge gap in the electric field distortion, the gap in the dielectric breakdown resistance decreased, discharge prone, the discharge gap increased accordingly . The increased discharge gap reduces the priming effect of the eroded product on the discharge and facilitates the flow and discharge of the eroded product, thereby reducing the occurrence of discharge concentration and uniformly distributing the discharge on the processed surface.
The discharge gap increases and the discharge channel becomes thick. Under the same discharge pulse energy, the heating area of the workpiece surface increases and the heating intensity decreases, forming large and shallow discharge pits on the surface of the workpiece. At the same time, the increase of the discharge gap also reduces the discharge ability of the discharge to the molten metal, so that more molten metal re-solidifies on the surface of the workpiece to further reduce the depth of the discharge pits. Therefore, mixed powder EDM in the workpiece surface to form large and shallow discharge pits.
Mixed powder EDM in the workpiece surface to form a large and shallow discharge pits and discharge pits uniform distribution is to reduce the roughness of the machining surface roughness of the root causes
The original PIKA surface processing, as the discharge energy can only focus on the smaller discharge area; discharge area becomes larger, the electrostatic capacitance also becomes larger. Therefore, the discharge energy concentrated in one place.
Large-scale PIKA processing (mirror processing) is also limited, if the EDM add special additives, double the surface of the workpiece formed a low conductive layer, the concentration will be small discharge