Automatic welding system design for transformer station grounding steel based on PLC

Based on the analysis of the type of grounded flat steel welding, the transformer station grounding flat steel automatic welding system is designed by using the XDM PLC as the main controller, and the three-axis motion mechanism and the R-axis rotation mechanism as actuators. According to working requirements, such as four-dimensional space degree of freedom welding requirements, system hardware configurations, the actuator design, system hardware selection, and the hardware connection form of the system are determined at first. The paper introduces the composition and working principle of the automatic welding system, focusing on the coordinate transformation relationship in the visual measurement, and gives the calibration process. The compensation methods after the rotation of the welding torch at each inflection point are discussed, and the different welding parameters are used according to different seam types during the welding process. The flow chart of control program is given out for the welding gun attitudes adjustment. The testing welding result shows this designed system can track the welding seam quite well and welding quality is satisfying, the more, this systemcan improve the welding efficiency greatly.