Stretching mould with rib resistance capable of being adjusted

Abstract

The invention relates to a stretching mould with rib resistance capable of being adjusted. The stretching mould with the rib resistance capable of being adjusted comprises an upper mould body and a lower mould body, and the upper mould body comprises an upper mould seat, a female mould arranged on the upper mould seat and a concave rib arranged on the upper mould seat. The lower mould body comprises a lower mould seat, an edge pressing ring arranged on the lower mould seat, an edge pressing ring protruding rib arranged on the lower mould seat and a male mould arranged on the lower mould seat. Protruding rib supporting rods for controlling the protruding stroke of the edge pressing ring protruding rib are arranged on the lower mould seat, the concave rib is matched with the edge pressing ring protruding rib, and the female mould is matched with the male mould. The stretching mould has the advantages that the protruding stroke of the edge pressing ring protruding rib can be controlled through the protruding rib supporting rods, the time for generating stretching resistance can be controlled, the strength of the stretching resistance can be controlled by controlling the height of the edge pressing ring protruding rib, and therefore the material flow-in quantity can be controlled better, and the phenomenon of wrinkling and deforming caused by later too fast feeding is reduced.

Description

technical field [0001] The invention relates to a stamping die, in particular to a stretching die in the stamping die which can adjust rib resistance. Background technique [0002] Such as figure 1 , 2 As shown, the traditional stretching die includes a patrix and a lower die, the lower die includes a lower die base 31, a punch 32, a blank holder 33 and a blank holder rib 34, and the upper die includes a patrix 41, a punch Rib 42 and die 43 can be stretched and formed by punch 32 and die 43. In the process of stretch forming, the inflow of material can be controlled by the concave rib 34 of the blank holder and the convex rib 42 of the upper die. Thin plate parts can well control the inflow of materials; but for thick plate parts with side walls such as girders, the tensile resistance cannot be controlled during the stretching process, which will easily cause the side walls to become trumpet-shaped, wrinkled and deformed, and there is a large return bomb problem. Conten...

AI Technical Summary

Problems solved by technology

[0002] like figure 1 , 2 As shown, the traditional stretching die includes a patrix and a lower die, the lower die includes a lower die base 31, a punch 32, a blank holder 33 and a blank holder rib 34, and the upper die includes a patrix 41, a punch Rib 42 and die 43 can be stretched and formed by punch 32 and die 43. In the process of stretch forming, the inflow of material can be controlled by the concave rib 34 of the blank holder and the convex rib 42 of the upper die. Thin plate parts can well control the inflow of materials; but for thick plate parts with side walls such as girders, the tensile resistance cannot be controlled during the stretching process, which will easily cause the side walls to become trumpet-shaped, wrinkled and deformed, and there is a large return impeachment problem

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