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Device for improving forming limit in hydromechanical deep drawing of sheet material and method thereof

A liquid-filled deep drawing and forming limit technology, which is applied in the field of metal plate liquid-filled deep drawing forming devices, can solve the problems of large drawing ratio, cracking forming limit and limitation of the bottom of drawn parts, etc., and achieve low cost and improved deep drawing Forming limits, easy-to-achieve effects

Inactive Publication Date: 2008-10-01
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a device and method for improving the forming limit of sheet metal filling deep drawing, so as to solve the problems caused by the large drawing ratio and deformation of the flange part of the sheet metal caused by the deep drawing parts of aluminum-magnesium alloy and other plates. The problem that the cracking and forming limit are limited due to excessive tensile stress

Method used

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  • Device for improving forming limit in hydromechanical deep drawing of sheet material and method thereof
  • Device for improving forming limit in hydromechanical deep drawing of sheet material and method thereof

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specific Embodiment approach 1

[0008] Specific implementation mode one: combine figure 1 and figure 2 Describe this embodiment, this embodiment is made up of blank holder 1, die 3, punch 4, dowel 5 and spring 6; 1-1 is coaxial with the concave mold cavity 3-1 of the concave mold 3 and has the same aperture, one end of the punch 4 is placed in the cavity 1-1, and one end of the dowel 5 is placed in the blank holder 1 and the concave mold 3 Between, the other end of dowel rod 5 is fixedly connected with spring 6. Place the sheet between the die and the blank holder, and connect the outer end of the sheet to the vertical rods. The dowels are arranged along the circumference of the sheet. The number of dowels can be adjusted according to the shape of the sheet. According to the specific material of the sheet metal, springs of different rigidity and length can be selected according to the different materials of the sheet metal forming, and radial pressure is applied to the surrounding area of ​​the deformatio...

specific Embodiment approach 2

[0009] Specific implementation mode two: combination figure 1 and figure 2 This embodiment is described. In this embodiment, a liquid injection hole 3-2 is horizontally arranged on the die 3, and the liquid injection hole 3-2 communicates with the cavity 3-1 of the female die. The purpose of such setting is to inject liquid into the cavity of the concave mold to realize the liquid-filled deep drawing of the sheet.

specific Embodiment approach 3

[0010] Specific implementation mode three: combination figure 1 and figure 2 Describe this embodiment, this embodiment is completed by the following steps: 1. inject the liquid into the concave mold cavity 3-1; 2. place the blank 2 on the concave mold 3; 4. Place one end of the dowel bar 5 on the outer end of the sheet material 2; 5. Connect the other end of the dowel bar 5 to the spring 6; 6. The punch is 4-way Moving down, the sheet material 2 is deformed and flows into the concave mold cavity 3-1. At the initial drawing, the spring is in a compressed state, and the elastic force applied to the sheet is relatively large. As the drawing progresses, the spring gradually elongates, and the elastic force gradually decreases until the end of drawing, and the elastic force decreases to zero. This variation of elastic force is consistent with the variation of the radial tensile stress in the deformation zone of the sheet metal during the deep drawing process. In this embodiment...

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Abstract

The invention discloses a device and a method for improving the limit of hydraulic deep drawing molding of plank stuff, which relates to a hydraulic deep drawing molding device of metal plank stuff and a method thereof, and solves the problem that as the deep drawing plate parts such as the plate parts made of magaluma have large deep drawing rate and deformed plank flange parts, the bottom of the deep drawing plate parts is easy to fracture and has limitation to the molding limit due to overlarge pulling stress. A stamping ring (1) is arranged at the upper part of a cavity die (3), a die space (1-1) of the stamping ring (1) has the same shaft and the same pore diameter with a die space (3-1) of the cavity die (3), one end of a male die (4) is arranged in the die space (1-1), one end of a dowel steel (5) is arranged between the stamping ring (1) and the cavity die (3), and the other end of the dowel steel (5) is fixedly connected with a spring (6). The device and the method for improving the limit of the hydraulic deep drawing molding of plank stuff realize the radial pressure exertion and controllability at a position of a deformed region at the outer side of the plate parts, are favorable for the deep drawing molding of the plate parts with complicated shapes, have simplicity, reliability, lower cost and easy implementation, and can remarkably improve the limit of the deep drawing molding of the plate parts.

Description

technical field [0001] The invention relates to a liquid-filled deep drawing forming device and method for a metal plate. Background technique [0002] Liquid-filled deep drawing of sheet metal is a manufacturing technology that uses liquid as the force transmission medium instead of the rigid die, so that the sheet is pressed against the punch under the action of liquid pressure to realize the forming of sheet metal parts. As an advanced flexible forming technology, it has a forming limit It has the advantages of high precision, high dimensional accuracy and good surface quality, and is especially suitable for forming and processing parts with complex structures and low plasticity materials, such as aluminum alloys, magnesium alloys, high-temperature alloys, and tailor-welded blanks with complex structures. [0003] Compared with deep-drawing steel and other materials, light materials such as aluminum alloy and magnesium alloy have small hardening index and anisotropy index...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D26/02B21D22/20B21D26/021B21D26/031
Inventor 刘晓晶李峰李超
Owner HARBIN UNIV OF SCI & TECH
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