Bending device for transformer insulating cardboard

The utility model relates to the technical field of paperboard bending, in particular to a bending device for a transformer insulating paperboard. According to the technical scheme, the paperboard comprises a paperboard body, a workbench, side pressing plates and springs, a supporting seat is welded to the lower surface of the workbench, a fixing arm is fixed to one side of the upper surface of the workbench through bolts, a U-shaped rod is slidably installed on the fixing arm, lower pressing plates are installed at the two ends of the U-shaped rod in a threaded mode, and a baffle ring is installed on the U-shaped rod in a threaded mode; a U-shaped rod is arranged on the side pressing plate, a spring is connected to the U-shaped rod in a sleeving mode and located between the lower surface of the fixing arm and the upper surface of the baffle ring, rotating shafts are symmetrically welded to the side pressing plate, the rotating shafts are rotationally installed on the outer wall of the fixing arm, and a press