Optimization of the Interelectrode Gap in Electrical Discharge Grinding with Changing Electrode Polarity

The paper investigates the process of electrical discharge diamond grinding with changing the polarity of electrodes in time in the cutting zone for processing various materials, and the value of the interelectrode gap is determined. The study aims to determine the optimal value of the interelectrode gap during electrical discharge grinding using the mathematical method of planning experiments. The mathematical method of planning experiments was used, which allows solving the optimization problem under conditions of incomplete knowledge of physical processes’ mechanism. The experiment’s planning gave the result with small errors and made it possible to minimize the number of experiments. As a result of experimental studies, a mathematical model of the limiting interelectrode gap from the electrical modes of electrical discharge diamond grinding was built. The functional dependence of the interelectrode gap was obtained, with the help of which it is possible to determine the value of the optimal interelectrode gap for various electrical parameters of electrical discharge grinding. It was established that the most significant factors that affect the interelectrode gap are the voltage of the ignition pulse and the amplitude of the discharge current.