PLC-based automatic tube plate welding machine control system

The utility model discloses a PLC-based automatic tube plate welding machine control system. The PLC-based automatic tube plate welding machine control system comprises a PLC module, a power source, a text displayer, a stepping motor with a speed reducer, a stepping motor driver, a relay and an isolation transformer; the power source is a multiplexed output direct current power source; the text displayer is a human-computer interaction platform for a PLC capable of inputting welding process parameters; the PLC module is connected with the stepping motor driver in a serial port communication mode or through pulse signal, direction signal and off-line signal wires; the relay is an electromagnetic relay or an electronic relay or a relay of other type and used for achieving the electrical isolation of control over arcing and arc quenching time of a welding gun from the PLC. The PLC-based automatic tube plate welding machine control system is simple in structure, can be matched with field general welding power source equipment, is applicable to a consumable electrode welding method, solves the problem that the circumferential movement of the welding gun is difficult to achieve by manual operation, and can accurately control the arcing and arc quenching time in the welding process.