COMPUTER CONTROL OF THE PROCESS OF RESISTANCE WELDING IN THE LABVIEW GRAPHICAL PROGRAMMING ENVIRONMENT
The program code of the corrective system for automatic regulation of heat input to the interelectrode zone in the process of resistance spot welding and resistance projection welding was developed. The computer control is carried out in the LabVIEW graphical programming environment. It comprises the wait to press the welding machine pedal and the start of the welding cycle unit, which, by means of timers-counters, counts time intervals for pre-compression, welding, peening and pause, as well as controls the activation of coils of electropneumatic valves of compression and peening. The welding current is switched on after the time of preliminary compression is counted, by setting the control voltage and changing the opening angle of the a thyristor contactor.