Automatic stirring friction welding device and method for ultra-thin plate

The automatic friction stir welding device comprises a main shaft, the main shaft is sleeved with a connecting shell through a bearing, the bottom of the connecting shell is fixedly connected with a laser range finder, the bottom of the main shaft is provided with a cutter handle, and the bottom of the cutter handle is connected with a stirring tool in an inserted mode. Welding following pressing devices are fixedly connected to the two sides of the bottom of the connecting shell, a constant displacement/constant pressure control module is arranged at the connecting end of the laser range finder, a pressure sensor is arranged at the connecting end of the constant displacement/constant pressure control module, a base plate is installed at the bottom of the pressure sensor, four pressing plates are arranged at the top of the base plate, and welded materials are arranged at the top of the pressure sensor. The top of the welded material is in contact with the pressing plate, additional cover plate materials are n