Mold and shaping technique for metal sheet material deep-drawing cup shell

Abstract

The invention discloses a die assembly of metal plate deep-drawing cup shells and shaping process. The invention comprises an upper die holder and a lower die holder, wherein a punch and a cavity die which are mutually corresponded are respectively arranged on the upper die holder and the lower die holder, a discharging screw which is connected with the upper die holder and a flanging spring which is sleeved on the discharging screw are arranged on the outer side of the punch, a blank holder is arranged on the lower end of the discharging screw, a holding frame which is fixedly connected with the lower die holder is arranged on the outer side of the cavity die, a conical pushing block and a rubber pad are arranged in turn in the holding frame from top to bottom, a conical enclasping element which is matched with the punch is arranged in the conical pushing block, a spring holder is arranged on the lower end of the lower die holder, a material squeezing spring is arranged in the spring holder, and a push rod which is extended through the rubber pat, the conical pushing block, and a conical clamping element is arranged on the upper end of the material squeezing spring. The invention carries out enclasping along the side-wall direction during the deep-drawing process of cup shells, material flowing tendency can be changed flexibly and actively, which enables wall thickness to be changed evenly, maximum thinning-out quantity on a dangerous cross portion during the process for drawing can be minimized and drawing breakage can be avoided.

Description

technical field [0001] The invention belongs to the field of material forming and moulds, and in particular relates to a mold and a forming process for a sheet metal drawing cup-shaped part. Background technique [0002] Sheet metal stamping has been widely used in many fields. How to make full use of the forming properties of materials, discover new forming processes and methods, and improve forming efficiency and quality is an important topic facing the entire industry, and it is also a hot research topic in plastic processing circles at home and abroad. Cup-shaped deep drawing is the most widely used forming process in the field of sheet metal stamping and forming. Deep forming efficiency and quality, especially the research on blank holder force, punch fillet, die fillet, lubrication conditions and other process parameters and die structure. However, as far as the current technology and achievements are concerned, they are still at the stage of perceptual understanding...

AI Technical Summary

Problems solved by technology

However, as far as the current technology and achievements are concerned, they are still at the stage of perceptual understanding. The determination and optimization of process parameters and mold structure often require long-term repeated experiments, which can be obtained by summarizing and inducing to improve the drawing efficiency and quality of cup-shaped parts. The effect is not obvious

Due to the uneven deformation and uneven wall thickness distribution of the cup-shaped parts during the deep-drawing process, the deep-drawing cracks always occur first at the place where the wall thickness is the largest and thinner, which leads to the failure of the entire deep-drawing forming, and the cracking defects The generation of the metal has a lot to do with the flow tendency of the metal during the deep drawing process

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