Metal plate punch forming device

The utility model relates to a sheet metal punch forming device which comprises a base, an upper die and a lower die, a fixing plate is fixedly installed at the upper end of the base, a plurality of fixing rods are fixedly installed at the edge of the upper end of the fixing plate, a supporting plate is fixedly installed at the top ends of the fixing rods, and the upper die is installed on the supporting plate through a control mechanism. The lower die is fixedly installed in the middle of the upper end of the fixing plate, an ejection mechanism acting on the metal plate is installed on the lower die, and a fixing mechanism acting on the metal plate is further installed on the lower die. When the metal plate stamping die is used, a metal plate is fixed through the fixing mechanism, then the upper die is controlled by the hydraulic air cylinder to stamp the metal plate, after work is completed, the pull ring is pulled, the fixing piece is pulled into the movable groove, and at the moment, the movable plate sta