Lathe clamping device for fan shell machining

The utility model relates to the technical field of fans, and discloses a fan shell machining lathe clamping device which comprises a connecting base, the upper surface of the connecting base is fixedly connected with two supporting plates, the inner wall of each supporting plate is fixedly connected with a hydraulic cylinder, the side faces, close to each other, of the two supporting plates are fixedly connected with two sets of limiting plates, and the limiting plates are fixedly connected with the connecting base. The outer surfaces of each set of limiting plates are jointly connected with a push plate in a sliding mode, and the telescopic ends of the two hydraulic cylinders are fixedly connected with the side faces, away from each other, of the two push plates correspondingly. By arranging the hydraulic cylinder, the stepping motor, the limiting plate, the push plate, the adjusting groove, the adjusting disc, the adjusting block, the clamping plate, the fixing plate and the fixing bolt, the fan shell can