Diamond - ECM Grinding of Ceramic-Metal Tungsten

AbstractThe reasoning of the diamond electrochemical grinding (DECMG) method of machining of rectangular ceramic metal - tungsten base plates (the surface 80-500 mm2) with their vacuum fastening on the table of the machine-tool is stated. The optimal grinding conditions using the cup diamond wheel bonded by the Cu-Al-Zn base in the electrolyte an aqueous solution of Na2HPO4 and Na2CO3 with additives are given. Depending on the relative position of the work- piece and the grinding wheel the electrode voltage was variable from 2.5V up to 5V, and the electrolyte flow rate supplied through two nozzles was variable too. The characteristics of DECMG in various processing zones as well as components that make stock removal during the double, forward and backward strokes of the machine-tool table are shown. Due to the machining of the plates using delicate grinding conditions they managed to have their predeter- mined sizes, surface roughness, the structure of the surface layers, the reflection power, the absence of defects and service life of the plates. Plates were machined following the request of a research organization for applications in the nuclear and thermonuclear technology. Information can be useful for researchers and developers of physical, chemi- cal and combined methods of machining