Special dies for door frame of security door

The invention discloses special dies for a door frame of a security door and belongs to the technical field of fabrication design of machine tool accessories. A first set of dies comprises a first upper die and a first lower die, a V-shaped die tip is arranged on the lower portion of the first upper die, and two V-shaped notches are formed in the upper portion of the first lower die. A V-shaped notch is formed in the lower portion of a second upper die of a second set of dies, an angle knife edge is arranged on the upper portion of the second lower die, a screw hole and a spring hole are formed in the lower portion of the second lower die, and a lower die holder is also provided with a hoisting hole and a spring hole. A reset mechanism comprises a hoisting screw and a spring, the spring is arranged between the second lower die and the spring hole formed in the lower die holder, and the hoisting screw penetrates through the hoisting hole from the lower portion of the lower die holder and is connected with the second lower die through the screw hole. According to the bending technology of the special dies, a traditional technology needing three sets of dies and six working procedures is changed into the technology only needing two sets of dies and four working procedures, frequent die replacement in the bending formation process is avoided, and the production efficiency of a bending machine is greatly improved.