Automatic welding line for flexible engine room and welding method thereof

The invention discloses an automatic welding line for a flexible engine room. The automatic welding line includes a PLC control system, a conveyor line controlled by the PLCcontrol system, a transferrobot and a welding robot, and further includes a workpiece pre-positioning device and a welding bench; the workpiece pre-positioning device is used for storing parts of anengine roomtransferred fromthe conveyor line and transmitting model data information to the PLC controlsystem; and the welding bench is provided with a conveying mechanism controlled by the PLC control system, one end of the conveying mechanism is located in a working range of the welding robot, and a welding clamp storage table is arranged at the other end of the conveying mechanism, and complete sets of welding clamps arranged on the welding clamp storage table can be switched between a preparation station and a working station facing the welding bench through the PLC controlsystem. The invention further discloses a welding method of the weldi