Impact force for micro-detonation of striking arc machining of silicon nitrides using the Taguchi method

Impact force during the process of micro-detonation of striking arc machining (MDSAM) for silicon nitrides was investigated experimentally. Based on the generation principles, the orthogonal experimental design and regression analysis were employed to build the empirical model in order to understand the effects of processing parameters on impact force. It was demonstrated that for working current, working gas pressure and nozzle diameter of the micro-detonation generator, there were significant effects while for pulse width and working distance, there was hardly effect. In particular, the impact force decreased with working current and increased with working pressure and nozzle diameter. The exponential empirical model showed a good regression relationship between the processing parameters and impact force, which was verified by the experimental results. The present study could also present an important example to reveal the machining mechanism of MDSA and to provide a methodology for the control of MDSAM process.