Punching mechanism of forming trimming die

The utility model relates to the technical field of die machining, and discloses a punching mechanism of a forming trimming die, which comprises a base, two mounting plates are fixedly connected to the outer wall of the top of the base, a lower die is located between the two mounting plates, two guide rails are fixedly connected to the outer walls of the tops of the two mounting plates, and sliding blocks are slidably connected to the outer walls of the guide rails. According to the stamping die, when the pressing plate drives the upper die to press downwards to stamp a workpiece placed on the lower die, the second wedge-shaped blocks are driven to extrude the two first wedge-shaped blocks downwards, the two first wedge-shaped blocks are driven to drive the sliding blocks to slide inwards on the outer walls of the guide rails, and then the upper die and the lower die are pressed downwards to stamp the workpiece placed on the lower die. Compared with the prior art, forming and edge cutting are integrated, an i