An electromagnetic forming method and device based on low temperature conditions

A technology of electromagnetic forming and low temperature conditions, applied in forming tools, metal processing equipment, manufacturing tools, etc., can solve the problems of limited forming force forming coils, large temperature rise of forming coils, reducing production efficiency, etc., to improve electrical conductivity, The effect of improving the forming force and improving the production efficiency

Active Publication Date: 2018-08-21
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide an electromagnetic forming method and device based on low temperature conditions, aiming at solving the problem that the existing electromagnetic forming technology is only suitable for metal materials with high conductivity, and the forming force is limited by the forming coil structure. Low electrical conductivity such as high-quality alloys, insufficient forming force, and large temperature rise of the forming coil during the forming process, which reduce the technical problems of production efficiency

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  • An electromagnetic forming method and device based on low temperature conditions
  • An electromagnetic forming method and device based on low temperature conditions
  • An electromagnetic forming method and device based on low temperature conditions

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Embodiment 1

[0049] image 3 A structural schematic diagram of an electromagnetic forming device provided for an embodiment of the present invention, such as image 3 As shown, it includes: a die 2, a blank holder 4, a forming coil 5, a forming coil fixing plate 6 and a capacitive pulse power supply 7 with a freewheeling circuit.

[0050] The die 2 is used to carry the material 3 to be formed, and the material to be formed is in a low temperature state. The blank holder 3 is arranged on the upper end of the die 2, and is used to provide the blank holder force for the flange area of ​​the material 3 to be formed, so as to prevent the peripheral area of ​​the material to be formed from excessive flow and cause wrinkling failure during the forming process. The forming coil fixing plate 6 is arranged on the upper end of the blank holder 4 for fixing the forming coil. The forming coil 5 is arranged inside the area surrounded by the material 3 to be formed, the blank holder 4 and the fixing pl...

Embodiment 2

[0066] Figure 5 A structural schematic diagram of another electromagnetic forming device provided for an embodiment of the present invention, such as Figure 5 As shown, it includes: a die 2, a blank holder 4, a forming coil 5, a forming coil fixing plate 6 and a capacitive pulse power supply 7 with a freewheeling circuit.

[0067] The side of the lower end of the blank holder 4 in contact with the material 3 to be formed is provided with n annular circulation channels, and the n annular circulation channels communicate with the area surrounded by the material 3 to be formed, the blank holder 4 and the forming coil fixing plate 6, and the forming coil The fixing plate 6 is provided with a through hole 9, and n is an integer greater than 0. The blank holder 4 is also used to hold the cooling medium 8 .

[0068] The through holes on the forming coil fixing plate 6 are used to allow the cooling medium 8 to flow into the blank holder 4, so that the cooling medium 8 reduces the ...

Embodiment 3

[0077] Figure 7 A structural schematic diagram of another electromagnetic forming device provided for an embodiment of the present invention, such as Figure 7 As shown, it includes: a die 2, a blank holder 4 that can contain a cooling medium, a forming coil 5, a forming coil fixing plate 6, and a capacitive pulse power supply 7 with a freewheeling circuit. The lower end surface of the blank holder 4 is in contact with the workpiece blank or semi-finished product and has a circulation channel 10. When liquid nitrogen passes through the circulation channel 10, the workpiece blank or semi-finished product 3 will be cooled by the principle of heat transfer.

[0078] The side of the lower end of the blank holder 4 in contact with the material 3 to be formed is provided with n annular circulation channels, and the n annular circulation channels are not connected to the area surrounded by the material 3 to be formed, the blank holder 4 and the forming coil fixing plate 6 , the for...

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Abstract

The invention discloses an electromagnetic forming method and device based on a low temperature condition. The method comprises the steps that a to-be-formed material in the low temperature state is obtained by lowering the temperature of the to-be-formed material; and the to-be-formed material in the low temperature state is driven by electromagnetic force to deform till mould forming is achieved. The forming depth of the to-be-formed material is improved by lowering the overall temperature of the to-be-formed material, or by adjusting the temperatures of different areas of the to-be-formed material, the to-be-formed material in the low temperature state has different temperature gradient distributions, the to-be-formed material in the low temperature state has different forming force field distributions, and thus the clinging effect of a female die is improved. According to the electromagnetic forming method and device based on the low temperature condition, the forming capability of a traditional electromagnetic forming system is improved, force field distribution in the process of electromagnetic forming is optimized, the attaching effect of a workpieces is improved, workpieces forming quality is improved, temperature rising of a forming winding is decreased, the service life of the forming winding is prolonged, and the application prospect is good.

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 based on low temperature conditions. Background technique [0002] Electromagnetic forming is a forming method in which the pulse electromagnetic force generated by the interaction between the eddy current in the metal material and the changing magnetic field during the discharge process causes the metal material to produce high-speed plastic deformation. The inertial effect, high strain rate effect, and high-speed collision between the metal workpiece and the mold during the high-speed forming process can greatly improve the forming performance of the metal material, and the forming process has the advantages of no contact, no pollution, and low energy consumption. Therefore, Electromagnetic forming has a good application prospect in lightweight alloys with high strength and poor plasticity. [0003] How...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D26/14B21D37/16
CPCB21D26/14B21D37/16
Inventor 李亮刘宁韩小涛曹全梁赖智鹏李潇翔
Owner HUAZHONG UNIV OF SCI & TECH
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