28-08-2017, 01:21 PM
Electro-chemical (ECDM) machining of high-strength, high-temperature electrical ceramic such as aluminum oxide (Al2O3) by the trepanation method (ie the orbital movement of the tool) has shown the possibility of drilling holes large by comparatively smaller electrodes efficiently and economically. However, with greater machined depth, conventional electrode configurations and machining parameters show that machining performance gradually deteriorates with increasing tool depth and ultimately causes micro cracks in the machined surface due to thermal shocks At high voltage. To reduce this problem and to improve the machining performance during the Al2O3 trephining operation, a 1.5 mm diameter spring-loaded cylindrical abrasive electrode has been used under the effect of the three most influent parameters, namely the tension Pulsed continuous feed, work factor and electrolyte conductivity, each at five different levels to evaluate the volume of material removed, the depth machined and the diameter cut.