Die extending structure and die extending method using hydraulic moveable male die

Abstract

The invention discloses a die extending structure and a die extending method using a hydraulic moveable male die. The die structure comprises an elastic polyurethane supporting component, a supporting plate, a male die base plate, an edge-pressing ring, a moveable male die, a small male die, a female die and an upper die base, wherein the elastic polyurethane supporting component and the supporting plate are fixed on a lower die base; the male die base plate is supported on the elastic polyurethane supporting component and the supporting plate; the edge-pressing ring is positioned on the maledie base plate; the moveable male die and the small male die are embedded into the edge-pressing ring; the female die is positioned on the edge-pressing ring, the moveable male die and the small maledie and a groove is formed on the female die; the upper die base is fixed on the female die; a jacking rod used for vertically jacking the edge-pressing ring and passing through the male die base plate is fixedly arranged at the top end of the elastic polyurethane supporting component; a metal plate which is molded by extending is placed between the upper surfaces of the edge-pressing ring, the moveable male die and the small male die and the lower surface of the female die; and a hydraulic system used for jacking the moveable male die is arranged on the male die base plate. The method comprises the following steps of: jacking the moveable male die to a set position through a hydraulic force of a hydraulic cylinder; descending the upper die base and descending the female die by pressing the female die on the plate; and after molding, jacking the molded manufactured piece out. Cracks generated in a deep drawing process are prevented.

Description

technical field [0001] The invention relates to a sheet metal deep drawing forming die. In particular, it relates to a drawing die structure and a drawing method using a hydraulic pressure active punch to increase the drawing depth and reduce the number of drawing times by passing the metal sheet through the drawing die. Background technique [0002] Drawing is an important forming method of sheet metal. In the conventional drawing die mechanism, the forming method of reverse drawing is generally used. Its characteristic is that the concave die is in the upper die part, the punch is fixed on the lower die seat, and the blank holder is used to press the material. For the feature of the deep cavity with a small feature distance or a large forming depth, during the forming process, the flow resistance of the material Larger as the depth of drawing increases, it is often prone to cracking of metal sheets or insufficient forming of local details, resulting in waste products. ...

AI Technical Summary

Problems solved by technology

Due to the large depth and the close distance between each other, it is easy to cause the sheet metal to crack during the deep drawing process.

Images