Model of Temperature Control by Electrically Stimulating Action Parameters

— Technologies for pressure shaping of metal workpieces using powerful current pulses are becoming increasingly widespread both in Russia and abroad. Unique electromechanical processes are studied and improved in laboratory and production environments. The application of current to the workpiece is accompanied by a change in its physical properties as a result of the so-called electroplastic effect (EPE). At the same time, the temperature of the workpiece in the deformation zone increases. An automatic force and temperature regulation system is necessary for maintaining high-quality and reliable operation of the drawing mill at electrostimulated drawing (ESW). In order to implement the temperature control circuit, it is necessary to synthesize the transfer function of the control object—steel wire wrought under pressure by rolling or drawing. The synthesis and analysis of the parameters of the temperature control object model are considered. Several known relations are used, such as the dependence of the pulse generator power on the calculated parameters (initial temperature, diameter, specific weight and electrical resistance of the workpiece, pulse duration), dependence of the generator’s RMS current on the amplitude and frequency of pulse reproduction, dependence of the magnetic permeability of the workpiece on its temperature, and dependence of the specific electrical resistance of the conductor material on temperature. The Matlab–Simulink software suite is used to synthesize a model of the temperature control object as a function for parameters of a generator of powerful current pulses (amplitude and frequency), as well as the parameters of the workpiece in processing (diameter, sample length, linear velocity, initial temperature, and resistivity at the initial temperature). The model is analyzed, and transients in different operating modes are presented. The developed model is used for deriving the dependences of the temperature, power, and equivalent resistance on the parameters of the generator and the workpiece at various generator pulse frequencies and workpiece diameters. The developed model can be used for laboratory studies of the electroplastic effect, as well as in producing electrostimulation drawing autocontrol systems in order to implement the controlled object as a model.