DISTRIBUTION OF ELECTRIC POTENTIAL DURING ELECTROMECHANICAL TREATMENT OF CYLINDRICAL PARTS WITH THREE ELECTRODE TOOLS

Further productivity increase and energy consumption reduction during electromechanical treatment (EMT) of machine parts is possible due to development and application of a three-tool impact on the treated surfaces. In this regard, power equipment for EMT, operating on linear voltage of the electrical power supply, should be used. Taking into account practical zero lag of the electric field associated with low frequency of the current in the active circuit of the EMT, we solved the problem of distributing electrical potentials in a cylindrical part along the radius of the cylinder, on the basis of the Laplace equation, as well as the deviation angle of the desired point from the initial position and the position of the electrode-tool along the axis of the cylinder. The obtained dependences were confirmed by practical experiments, which allowed to construct the surfaces of potential response of a cylindrical part during EMT, depending on the current radius values and cylindrical part length, as well as the deviation angle in the transverse plane of the desired point from the initial coordinate. Thereupon, it is possible to determine the features of heat release in the part during EMT with three tool electrodes. It allows to evaluate the nature of heat distribution over the volume of cylindrical parts during EMT, determine the parameters of the required current source, select the suitable treatment modes, and determine the nature of temperature changes in the workpiece, including in the area of its contact with the tool electrode.