Punching die based on uneven resistance of deep-drawing rib

Abstract

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.

Description

technical field [0001] The invention relates to a device in the technical field of metal plastic processing, in particular to a stamping die based on non-uniform drawbead resistance. Background technique [0002] Drawing ribs are mostly set on the pressing surface of the drawing die of complex sheet metal parts. Drawing ribs can control the resistance of the stretched sheet material entering the die, improve the formability of the sheet material, and avoid local wrinkling and cracking. Defects, play a crucial role in stretch forming. [0003] The current drawbead size design is usually equal in section along the length direction, and this drawbead can provide uniform drawbead resistance along the length direction to control the deformation of the sheet metal. For the stretching of inclined-bottom box-shaped stamping parts with unequal depths in industrial production, the design of the contour of the cross-section of the drawing rib is not conducive to the forming of the sha...

AI Technical Summary

Problems solved by technology

However, this patent does not consider the non-uniform drawbead resistance required for the stretching of unequal-depth inclined-bottom boxes, nor does it provide a high design mode for the cross-sectional height of the drawbead along the direction of the drawbead

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