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Electromagnetic progressive mold-free integral compound forming method and device for metal sheets

A technology of composite forming and sheet metal parts, applied in the field of part forming and manufacturing, it can solve the problems of poor surface forming quality and inability to form integral parts of sheet metal parts, shorten the forming cycle, solve the problems of mold design and processing, and reduce the production cost. Effect

Active Publication Date: 2018-09-18
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Through the above process, the precise overall forming of sheet metal parts can be realized, thereby solving the technical problems of poor surface forming quality of sheet metal parts, inability to form integrally or needing to use molds to achieve forming

Method used

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  • Electromagnetic progressive mold-free integral compound forming method and device for metal sheets
  • Electromagnetic progressive mold-free integral compound forming method and device for metal sheets
  • Electromagnetic progressive mold-free integral compound forming method and device for metal sheets

Examples

Experimental program
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Effect test

Embodiment 1

[0064] An embodiment of the present invention provides an electromagnetic progressive moldless integral forming device for sheet metal parts, which includes a discharge coil and a blank holder assembly, wherein,

[0065] The discharge coil is a planar spiral coil, the number of coil layers is 1 to 3 layers, and the cross section of the coil wire adopts a rectangular cross section. Such as figure 1 Shown is a blank holder assembly, which includes an upper blank holder 4, a lower blank holder 3, a support rod 2, and a base 1, wherein the inner and outer diameters of the upper and lower blank holders are designed according to the size of the specific target forming part, and the upper and lower press The matching edge rings can clamp and fix the plate 6 to be formed; the upper and lower edge rings are provided with 8 pairs of perforations in one-to-one correspondence;

[0066] Such as figure 2 Shown is support rod 2, and there are 8 support rods 2, each support rod 2 has a bos...

Embodiment 2

[0069] Assume that the shape of the target formed part is a bulge with a maximum diameter of 1000mm, a thickness of 3mm, and a maximum depth of 400mm, made of aluminum alloy.

[0070] Such as Figure 4 As shown, it is the technical roadmap of the electromagnetic progressive moldless overall composite forming method. It uses finite element simulation first, and compares the size of the simulated part with the size of the part to be formed. If the two are consistent, the simulated discharge parameters and discharge path can be used. Carry out moldless electromagnetic progressive forming, otherwise reset the discharge parameters and discharge path. Finally, the coreless spinning equipment is used for precise shaping. Through the above process, the precise overall forming of sheet metal parts can be realized.

[0071] Specifically, the electromagnetic progressive moldless overall composite forming method in this embodiment includes the following steps:

[0072] Step 1: Design t...

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Abstract

The invention discloses an electromagnetic progressive mold-free integral compound forming method and device for metal sheets and belongs to the related technical field of part shaping and manufacturing. The method comprises the following steps: designing an edge pressing assembly according to the dimension of a target shaping part; establishing a finite element model and carrying out simulated forming analysis; providing a forming device, setting discharge parameters and discharge paths according to the simulated result for electromagnetic progressive mold-free integral forming to obtain a preformed part; and clamping the preformed part on core mold-free spinning equipment to be shaped to obtain the final shape meeting the processing demands. The method and device disclosed by the invention achieve mold-free integral forming of large shell parts, so that the defect that the surface of the part is uneven is avoided effectively, and the forming precision and the surface quality of the formed part are improved greatly. In addition, the method is high in universality. One set of edge pressing assembly is only needed if different products are processed, so that the production period isshortened greatly, and the production cost of the large metal sheet is lowered remarkably.

Description

technical field [0001] The invention belongs to the technical field related to part forming and manufacturing, and more specifically relates to a method and device for electromagnetic progressive dieless integral composite forming of a sheet metal part. Background technique [0002] With the continuous improvement of comprehensive national strength, my country has made great breakthroughs in the field of aerospace. As a carrier for exploring the universe, space rockets have also made great achievements. However, the formation of the tank bottom of the space launch vehicle is always a difficult problem. At present, the bottom of the storage tank mostly adopts the combined structure of melon petals and top cover ellipsoid, which are connected by welding process. The parts formed by this method will produce large welding residual stress, and the mechanical properties are difficult to control. However, direct spinning with spinning equipment requires large-scale spinning equip...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D26/14B21D31/00
Inventor 黄亮赵明杰李建军张启宪肖望
Owner HUAZHONG UNIV OF SCI & TECH
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