Electromagnetic pulse forming device and method for metal sheet

An electromagnetic pulse, metal plate technology, applied in transportation, packaging, vehicle parts, etc., can solve the problems of small induced eddy current and insufficient forming force, and achieve the effect of increasing current size, strong flexibility, and easily adjustable and controllable size.

CN107127243AActive Publication Date: 2017-09-05HUAZHONG UNIV OF SCI & TECH
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2017-09-05

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Abstract

The invention discloses an electromagnetic pulse forming device and method for a metal sheet. The electromagnetic pulse forming method includes the steps that S1, when the metal sheet to be formed is arranged between a forming die and a forming coil, pressure equipment is used for applying pressure through a blank holder, and accordingly a metal sheet flange area can be prevented from being wrinkled; S2, a first power module is used for supplying a current to the forming coil, and the powered-on forming coil generates a pulsed magnet field at a metal sheet area; a second power module is used for supplying a current to the metal sheet, so that a pulse current is generated in the metal sheet; and the pulse current and the pulsed magnet field act with each other to generate electromagnetic force used for driving the metal sheet to be subjected to high-speed deformation; and S3, the metal sheet to be formed can be deformed through the electromagnetic force. According to the electromagnetic pulse forming device and method, in the mode of directly loading the currents, the current magnitude in the metal sheet can be increased obviously, the influence on the current magnitude by electrical resistivity is small, and the problem of being insufficient in forming force due to the fact that the induced eddy current of a low electric conductivity material is small can be effectively solved.
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Description

technical field

[0001] The invention belongs to the field of plastic forming of metal materials, and more specifically relates to an electromagnetic pulse forming device and method for metal plates. Background technique

[0002] Lightweight is an important technical means to improve the ultimate carrying capacity of carrier devices and realize energy saving and emission reduction in aerospace, automobile and other fields. High-performance aluminum alloys, titanium alloys, and magnesium alloys have become the materials of choice for modern aerospace equipment to increase the limit of structural load-bearing capacity.

[0003] However, under the existing quasi-static forming process, the above-mentioned light alloys have poor plastic formability and are prone to springback and cracking, which directly affect the quality of formed parts. Electromagnetic pulse forming technology is a high-energy, high-speed special processing method that uses pulsed electromagnetic force to pla...

Examples

Embodiment Construction

[0036] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0037] The invention directly loads the pulse current on the metal plate without generating eddy current through the change of the magnetic field of the induction forming coil. The loaded pulse current and the pulse magnetic field generated in the forming coil can instantly generate a strong pulse electromagnetic force. When the magnetic pressure reaches the yield strength of the material, it will drive the metal plate to undergo high-speed plastic deformation.

[0038] The device for realizing the electromagnetic forming method includes: a forming coil 1, a metal plate 3, a blank holder 6, a press...