The invention discloses a
punching die based on uneven resistance of a deep-drawing rib, belonging to the technical field of
metal plasticty
machining. The
punching die comprises a convex die, a concave die, a blank holder, a convex die base plate, a lower die plate, a guide post, a guide sleeve, a guide plate and a convex die
gasket, wherein the convex die and the convex die base plate are fixedly connected with each other, the convex die base plate is fixedly arranged on the lower die plate, the lower die plate is connected with a downwardly-arranged motion mechanism of a pressure
machine, the blank holder is connected with the pressure
machine, the guide plate is arranged in the blank holder and contacted with the convex die, the guide post and the guide sleeve are respectively arranged in the blank holder and the concave die, and the positions of the guide post and the guide sleeve are matched with each other, the concave die is fixedly connected with an upper slider of the pressure
machine, and two sides corresponding to the positions of the convex die are respectively provided with two deep-drawing ribs with
variable resistance and two corresponding lower grooves on a material pressing surface of the blank holder. By adopting the invention, the flow evenness of metals of a
flange part and a side wall part of box-shaped components with inclined bottom surfaces is remarkably improved, and local crushing or wrinkling conditions caused by even increase or even decrease of the resistance of the deep-drawing ribs are avoided.