Compound die for cup punching for steel shell

Abstract

The invention discloses a compound die for cup punching for a steel shell. The compound die for cup punching for the steel shell comprises an upper die part and a lower die part, wherein the upper die part is divided into an upper die for blanking and an upper die for stretching, the upper die for stretching is fixed to the bottom surface of a punch press sliding block, the upper die for blanking is in floating connection with the lower die part, the lower die part comprises a lower die, a discharging plate and a stripping device, and the upper die for blanking comprises an upper knife edge for blanking, a pressing ring and a pressing spring; and the upper die for stretching comprises a stretching punch and a nitrogen spring, when the sliding block moves downwards, the upper die for stretching moves downwards, the nitrogen spring abuts against the upper die for blanking and pushes the upper die for blanking to move downwards, a limiting column is arranged on a lower die fixing plate, when the upper die for blanking moves downwards and abuts against the limiting column, the upper die for blanking and the lower die are matched to complete blanking and pressing, the sliding block continues moving downwards, the stretching punch completes stretching, and when the sliding block moves upwards, the stripping device completes stripping for the cup shell. The compound die for cup punching for the steel shell is reasonable in structure, can stably and reliably realize the four actions of blanking, pressing, stretching and stripping so as to realize a stable, reliable and continuous cup punching process, and can basically eliminate the defects of the rim of the cup shell and increase the production efficiency.

Description

technical field [0001] The invention belongs to the technical field of battery steel shell stamping, and relates to a cup punching die, in particular to a composite steel shell punching cup die, which is used for punching steel shells of alkaline zinc-manganese batteries. Background technique [0002] Alkaline battery steel case is made of thin steel strip through multi-station stretching. Usually, the first station completes blanking and first-stage stretching through a composite mold, referred to as punching cup. In fact, to complete the "blanking + stretching" action, there are four main actions in the extension: blanking, pressing, stretching, and stripping. At present, the domestic punch press industry is generally a single-slider general-purpose punch. In general, a composite mold is installed on a single-slider general-purpose punch to realize the four actions and realize continuous punching. The stability and reliability are not high, which is more typical at present...

AI Technical Summary

Problems solved by technology

[0007] b. The relative movement distance of the pressing ring 1.4 is too large. Under the action of the pressing spring 1.7, the initial pressing force and the final pressing force are quite different, which often causes the edge of the cup shell to be pressed, which is not conducive to the subsequent multiple The station is further stretched step by step

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