Plate overturning mechanism

The utility model belongs to the technical field of plate machining, and relates to a mechanical device of plate machining, in particular to a plate overturning mechanism. The plate overturning mechanism comprises a machine frame, an air cylinder arranged below the machine frame and idler wheels arranged on the machine frame. A plate transverse tightening device is arranged between the machine frame and idler wheels. A plate overturning device is arranged above the idler wheels. The plate overturning device comprises a plate roller mechanism and a plate longitudinal clamping mechanism. By the adoption of the plate overturning mechanism, full-automatic overturning of plates can be achieved, the production efficiency of plate machining is improved, the labor intensity of operation personnel is relieved, and continuous automatic production is achieved when the plate overturning mechanism is used in cooperation with other machining devices.