Automatic feeding and discharging device used in cooperation with plate cutting machine exchange workbench

The utility model discloses an automatic feeding and discharging device used in cooperation with an exchange workbench of a plate cutting machine, and aims at providing the automatic feeding and discharging device capable of improving the plate machining efficiency. The device comprises a portal frame, a plate lifting walking device installed on the portal frame and a finished product transfer rail car. Explaining according to the following coordinate axes: X, Y and Z axes; the upper frame body is installed at the upper end of the portal frame and can move relative to the portal frame in the X-axis direction, the lower frame body is located below the upper frame body and connected with the upper frame body, the vacuum suction cup set is installed at the lower end of the lower frame body, and the guide rods are fixedly connected to the lower frame body at intervals in the Y-axis direction. The two comb tooth mechanisms are symmetrically located at the two ends of the guide rod and are in sliding fit with the g