Automatic unmanned equipment preassembling table and robot gripper for rear pipe arc welding workstation

The utility model provides an automatic unmanned equipment preassembling table and a robot gripper of a rear pipe arc welding workstation, and belongs to the technical field of mechanical equipment. The workstation comprises a welding room unit and a preassembling feeding and discharging unit; the welding room unit is composed of a welding room, and the preassembled feeding and discharging unit is arranged on one side of the welding room. The preassembling feeding and discharging unit is composed of an automatic pipe feeding machine, a preassembling configuration platform, an automatic feeding and discharging robot and a discharging belt line. An automatic feeding and discharging robot is arranged in the space position between the preassembling configuration platform and the welding room, and a robot gripper is arranged at the working end of a working arm of the automatic feeding and discharging robot. A working window in butt joint with the automatic feeding and discharging robot is formed in one side of the