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Electromagnetic forming method and device of metal plate

An electromagnetic forming and metal plate technology, which is applied in the field of metal forming and manufacturing, can solve the problems of low structural strength of forming coils, uncontrollable electromagnetic force distribution, poor quality of multiple forming, and achieve good mold adaptability and restrain the attenuation of electromagnetic force. , the effect of improving the forming ability

Active Publication Date: 2018-01-16
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide an electromagnetic forming method and device for sheet metal parts, aiming to solve the problem of uncontrollable distribution of electromagnetic force in the existing traditional single-coil electromagnetic forming, low structural strength of the forming coil, low forming efficiency and multiple forming Poor quality technical issues

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  • Electromagnetic forming method and device of metal plate
  • Electromagnetic forming method and device of metal plate
  • Electromagnetic forming method and device of metal plate

Examples

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no. 1 example

[0065] figure 2 The first embodiment of the electromagnetic forming device for sheet metal provided by the present invention, the electromagnetic forming device includes a first forming coil 1-1, a second forming coil 1-2, a sheet blank (metal sheet to be formed) 2 -1. Mold 3, blank holder 4, first power supply 6-1 and second power supply 6-2, wherein the plate blank 2-1 can be made of aluminum alloy material, and this type of aluminum alloy material has high electrical conductivity and good plasticity , low strength and easy to form; the longitudinal section of the forming die 3 is an elliptical profile; the first forming coil 1-1 and the second forming coil 1-2 are integrated, and the outermost layers are all made of high-strength fiber material 5-1 and 5-2 is reinforced, and the axial direction cannot be moved. The forming method corresponding to the electromagnetic forming device comprises the following steps:

[0066] (1) Place the sheet blank 2-1 on the upper surface ...

no. 2 example

[0071] image 3 The second embodiment of the electromagnetic forming device for sheet metal provided by the present invention, the electromagnetic forming device includes a first forming coil 1-1, a second forming coil 1-2, a sheet blank 2-1, a mold 3, and a blank holder Circle 4, the first power source 6-1 and the second power source 6-2, wherein the plate blank 2-1 can be made of aluminum alloy material, which has low electrical conductivity and high strength and is difficult to form. The first forming coil 1-1 and the second forming coil 1-2 are two independent coils, and the first forming coil 1-1 can move along the axial direction. The forming method corresponding to the electromagnetic forming device comprises the following steps:

[0072] (1) Place the sheet blank 2-1 on the upper surface of the mold 3, place the blank holder 4 on the sheet and apply a certain pressure, wherein the outer diameter of the blank holder 4 and the sheet blank 2-1 The outer diameter of and ...

no. 3 example

[0079] Figure 4 The third embodiment of the electromagnetic forming device for sheet metal provided by the present invention, the electromagnetic forming device includes a first forming coil 1-1, a second forming coil 1-2 and a third forming coil 1-3, and a sheet blank 2 -1. Mold 3, blank holder 4, first power source 6-1 and second power source 6-2, wherein the plate blank 2-1 can be made of aluminum alloy material, and this type of aluminum alloy material has high electrical conductivity and good plasticity , low strength, easy to form; the longitudinal section of the forming die 3 is an elliptical profile; the first forming coil 1-1, the second forming coil 1-2 and the third forming coil 1-3 are a whole, and the outermost layers are all made of The high-strength fiber materials 5-1, 5-2 and 5-3 are reinforced, and the overall axial direction cannot move. The forming method corresponding to the electromagnetic forming device comprises the following steps:

[0080] (1) Place ...

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Abstract

The invention discloses an electromagnetic forming method and device of a metal plate. The method comprises the steps that a plurality of coaxial forming coils are placed above the to-be-formed metalplate; pulse currents are introduced into the forming coils, induced eddy currents are generated in the metal plate, a magnetic field generated by the pulse currents and the induced eddy currents actto generate electromagnetic force, and the electromagnetic force points to a die; the metal plate is deformed to the die to be formed under the driving of the electromagnetic force; when a metal workpiece obtained by forming the metal plate through the electromagnetic force is not closely attached to the die, at least one forming coil in the forming coils moves axially to the upper portion of themetal workpiece, and then pulse currents are introduced into the forming coils again, so that the metal workpiece is deformed to the die under the driving of the electromagnetic force and is closely attached to the die to be formed. A single coil is divided into a plurality of independent or mutually-correlated coaxial single coils, so that the energy utilization rate in the discharging process isincreased, the structural strength of the coils is improved, and the controllability of electromagnetic field distribution is improved.

Description

technical field [0001] The invention belongs to the field of metal forming and manufacturing, and more specifically relates to an electromagnetic forming method and device for a metal plate. Background technique [0002] In the electromagnetic forming process of sheet metal, the structural strength of the coil is the guarantee of the electromagnetic forming ability. The distribution of the electromagnetic force field is the key factor determining the final deformation profile of the sheet. High-strength coils can provide sufficient electromagnetic force and reasonably distributed electromagnetic force. The force field can effectively improve the deformation behavior of the plate, so that the plate can fully deform and fit the mold without failure. [0003] The traditional sheet metal electromagnetic forming uses a single forming coil electromagnetic forming system. The single coil electromagnetic forming system has the following problems: [0004] 1. The distribution of the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D26/14
CPCY02P10/25
Inventor 李亮刘宁赖智鹏韩小涛曹全梁
Owner HUAZHONG UNIV OF SCI & TECH
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