RESEARCH AND DEVELOPMENT OF THE ARC VOLTAGE PID-CONTROLLER MODEL DURING SURFACING

The development and testing of a PID-controller model capable of automatically adjusting and maintaining the specified arc voltage during electric arc welding are presented. Some features of arc surfacing processes are analyzed. In particular, the choice of surfacing modes, as well as the main devices - potentiometers, which are used in the electrical circuits of surfacing installations to regulate the main parameters of surfacing modes - voltage and current. Evidence is presented for the need to control the voltage directly on the arc, rather than the voltage on the power source, to regulate the welding process. Based on this analysis, a model of the PID- controller of the arc voltage during arc welding was created using the Simulink MATLAB program. The test results of the PID-controller show that the device provides more accurate and stable setting of the deposition mode than traditional control methods. The PID-controller will make it possible to significantly reduce possible errors in the development and use of technologies of automatic arc welding of various parts and products. References 10, figures 6, table 1.