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A kind of sheet metal electromagnetic force inverse expansion deep drawing method and forming device

A technology of electromagnetic force and expansion, which is applied in the field of sheet electromagnetic force inverse expansion deep drawing forming method and forming device, and can solve the problems of increasing punch production cost, reducing the quality of deep drawing parts, and being unable to realize industrial application.

Active Publication Date: 2020-10-27
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this method has obvious limitations: (1) The punch is often made of steel, and the coil is wound with high-conductivity materials such as copper. In order to avoid contact between the coil and the steel mold, insulating materials need to be filled between the coil and the steel mold ; (2) From the document "Electromagnetic pulse-assisted incremental drawing of aluminum cylindrical cup", it can be seen that after the coil is discharged, the sheet material bulges, and the pressing of the punch cannot make the bottom of the sheet material flat, and there will always be a bulge on the top of the sheet material , which greatly reduces the quality of drawn parts
Therefore, setting the coil in the punch will significantly increase the production cost of the punch and reduce the service life of the punch, and cannot achieve deep drawing of high-quality parts, so that real industrial applications cannot be realized

Method used

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  • A kind of sheet metal electromagnetic force inverse expansion deep drawing method and forming device
  • A kind of sheet metal electromagnetic force inverse expansion deep drawing method and forming device
  • A kind of sheet metal electromagnetic force inverse expansion deep drawing method and forming device

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Experimental program
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Embodiment 1

[0038] Figure 1 to Figure 5 It shows the first embodiment of the electromagnetic force anti-expansion deep drawing method of the present invention, including the following steps:

[0039] S1: Set the same translation path 2 and anti-expansion drawing path 3;

[0040] S2: Place the sheet material 1 on the translation path 2 and cover it on the anti-expansion drawing path 3;

[0041] S3: Apply radial electromagnetic force to the sheet 1 to push the sheet 1 to the anti-expansion drawing path 3, and at the same time apply axial electromagnetic force to the sheet 1 under the anti-expansion drawing path 3 to make the sheet 1 upward anti-expansion ;

[0042] S4: Apply an axial thrust to the sheet 1 above the anti-expansion drawing path 3 to draw the sheet 1 downward;

[0043] S5: keep step S3 to step S4 and continue until the forming is completed.

[0044] In the sheet metal electromagnetic force anti-expansion deep drawing forming method of the present invention, the sheet mate...

Embodiment 2

[0047] figure 1 as well as Figure 6 to Figure 11 It shows the second embodiment of the electromagnetic force anti-expansion drawing forming method of the present invention, the forming method is basically the same as the embodiment 1, the only difference is: in this embodiment, in step S3, the radial electromagnetic force is changed from The sheet 1 is applied above and below and acts on the ends of the sheet 1 . The radial electromagnetic coils are arranged on the upper and lower sides of the sheet, and form a radial electromagnetic force at the end of the sheet, which can realize the step-by-step forming of the flanging, and the required single radial electromagnetic force is relatively small.

[0048] In this embodiment, in step S3, a wave-shaped anti-expansion structure is formed in the anti-expansion drawing path 3, which is suitable for forming requirements with a large drawing depth.

[0049] Device embodiment 1

[0050] Figure 2 to Figure 5It shows the first embo...

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Abstract

The invention provides a plate electromagnetic force anti-expansion drawing forming method and forming device. The method is characterized in that S1, a horizontal moving path and a reverse expansiondeep drawing path are arranged; S2, a plate material is placed on a translation path; S3, radial electromagnetic force is applied to the plate material to enable the plate material to extrude towardsthe reverse expansion deep-drawing path, and meanwhile, an axial electromagnetic force is applied to the plate material under the reverse expansion deep drawing path, so that the plate material is swelled upwards; S4, axial thrust is applied to the plate material so as to enable the plate material to stretch downwards; and S5, the step S3 to the step S4 are kept to recycle until forming is finished. The device comprises a female die, an edge pressing ring, a male die and an ejector rod, wherein the edge pressing ring is arranged above the female die and the translation path is formed between the edge pressing ring and the female die, the concave die is provided with a penetrating back-expanding deep-drawing path, the plate material is arranged on the horizontal-moving path, the male die and the ejector rod are arranged above the plate material in a split mode, a radial side pushing coil is arranged near the horizontal moving path, and an axial reverse expansion coil is arranged at thetop of the ejector rod. The forming device has the advantages of being uniform and stable in forming, capable of improving forming efficiency and forming quality and the like.

Description

technical field [0001] The invention mainly relates to the technical field of high-speed forming for plastic processing of materials, and in particular to a method and a forming device for sheet metal anti-expansion deep-drawing forming by electromagnetic force. Background technique [0002] Electromagnetic pulse forming is a method of high-speed machining of metal workpieces using pulsed magnetic field force. The research shows that under high-speed impact, the material produces a dynamic behavior different from the quasi-static deformation behavior of the traditional processing method, that is, the material appears crystal twinning, tissue phase transformation, and adiabatic shear under the impact of deformation elastic waves and plastic waves. isodynamic behavior. Therefore, it can effectively improve the forming limit of hard-to-deform materials such as aluminum alloys, magnesium alloys and titanium alloys, and reduce springback. [0003] In the document "A Device and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D26/14
Inventor 崔晓辉杜志浩喻海良肖昂
Owner CENT SOUTH UNIV