Thermo electromagnetic forming method of magnesium alloy sheet material

An electromagnetic forming and magnesium alloy technology, which is applied in forming tools, metal processing equipment, manufacturing tools, etc., can solve the problems of limiting the application range of flat blank electromagnetic forming technology, uneven distribution of magnetic pressure, and low coil efficiency.

Inactive Publication Date: 2009-12-02
WUHAN UNIV OF TECH
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, planar spiral coils and slat coils are mostly used in sheet electromagnetic forming, which has defects such as uneven magnetic

Method used

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  • Thermo electromagnetic forming method of magnesium alloy sheet material
  • Thermo electromagnetic forming method of magnesium alloy sheet material
  • Thermo electromagnetic forming method of magnesium alloy sheet material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Embodiment 1 uses AZ31 magnesium alloy sheet material as warm electromagnetic bulging experiment

[0032] 1. Experimental process

[0033] 1. Material preparation:

[0034] The material used in the experiment is the AZ31 magnesium alloy cross-rolled plate provided by Yingkou Yinhe Magnesium Aluminum Alloy Co., Ltd., and its chemical composition is shown in Table 1. The experimental materials were subjected to homogenization annealing treatment, the annealing temperature was 300°C, kept for 1 hour and then cooled in the furnace.

[0035] Table 1 The chemical composition of the AZ31 magnesium alloy sheet used in the experiment

[0036]

[0037] 2. Forming process

[0038] Electromagnetic bulging test in such as figure 1 Carried out on the tooling structure shown. use Figure 2a , Figure 2b , image 3 The electromagnetic forming coil shown was used for experiments. A rectangular sample with a thickness of 0.5-2.5mm and a thickness of 70mm×100mm is used.

[00...

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Abstract

The invention provides a plastic working method capable of improving the forming property of a magnesium alloy sheet material, namely a thermo electromagnetic forming method. The method comprises the following steps: putting the magnesium alloy sheet material on a cavity die; heating the magnesium alloy sheet material through a heating rod in the cavity die so that the temperature of the magnesium alloy sheet material is raised to be between 100 and 300 DEG C; compacting the magnesium alloy sheet material by an electromagnetic forming coil under the action of a pressing machine; and discharging the electromagnetic forming coil by an electromagnetic forming device so that the magnesium alloy sheet material is adhered to the die and formed. The method uses an energy storage capacitor to perform instantaneous discharge on the electromagnetic forming coil to generate a hard pulse magnetic field so that a heated blank is formed at a high speed under the action of an impacting electromagnetic force, and the method combines the advantages of thermo-forming and electromagnetic forming so the forming property of the magnesium alloy sheet material is effectively improved, and the limitations of lubrication in single thermo-forming and material and environmental pollutions caused by the single thermo-forming, limited forming speed, die strength, rigorous forming process conditions, small parameter adjustable range and the like are overcome.

Description

technical field [0001] The invention belongs to the field of mechanical engineering, in particular to a warm and electromagnetic forming method for a magnesium alloy plate. It is mainly used to improve the formability of magnesium alloy sheets and provide a new and more effective method for plastic processing of magnesium alloy sheets. Background technique [0002] In recent years, the automobile industry, especially China's automobile industry, has developed rapidly. At the same time, the environmental and energy problems brought about by the development of the automobile industry are becoming more and more serious. Among them, 75% of the energy consumption of automobiles is directly related to the weight of the vehicle. Therefore, global automobile manufacturers are competing to develop and use new materials and new processes to reduce vehicle weight, reduce fuel consumption, and reduce exhaust emissions. Automobile lightweight has become the mainstream trend of modern st...

Claims

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Application Information

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IPC IPC(8): B21D26/14B21D37/16
CPCB21D26/14B21D35/005B21D37/16
Inventor 黄尚宇孟正华胡建华李友成张开李正
Owner WUHAN UNIV OF TECH
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