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Electromagnetic inching forming method and its device for plate moving coil

A progressive forming and electromagnetic forming technology, applied in the direction of program control, instrument, computer control, etc., can solve the problems of easy wrinkling and tearing, poor dimensional accuracy of formed parts, and scratches on the surface, achieving good repeatability and easy Effects of energy control and automated production

Inactive Publication Date: 2008-12-31
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method has the following disadvantages: the dimensional accuracy of the formed part is poor, and its radius of curvature is limited by the radius of the tool head, which cannot be small, and there are scratches on the surface, and the surface quality is poor; High resistance, easy to wrinkle and tear

Method used

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  • Electromagnetic inching forming method and its device for plate moving coil
  • Electromagnetic inching forming method and its device for plate moving coil
  • Electromagnetic inching forming method and its device for plate moving coil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] In the forming device, the pulse energy storage capacitor is 56000μF, and the working voltage is 400V. The electromagnetic forming coil is wound from a copper electromagnetic wire with a specification of 2.5mm×5mm to form a circular densely wound wire plate coil with a diameter of Φ70mm. The space is insulated with epoxy resin and glass cloth, the total resistance of the discharge circuit is 0.167Ω, the total inductance is 3.7μH, the charging time is 4 seconds, the plate is made of AA6061-T6 aluminum alloy, the thickness is 1mm, and the initial size is 410mm×410mm. A circular platform with a side diameter of Φ350mm, a height of 150mm, and a cone angle of 76°. Such as Figure 4A As shown, the forward electromagnetic progressive stretching method is adopted, the electromagnetic forming coil 11 gradually forms the plate 12 along the outer surface of the model 20 by means of electromagnetic force, and the edge of the plate 12 descends as the electromagnetic forming coil 11 ...

Embodiment 2

[0038] In the forming device, the pulse energy storage capacitor is 60μF, and the working voltage is 26.9KV. The electromagnetic forming coil is wound by a copper electromagnetic wire with a specification of 2mm×6mm to form a circular densely wound wire plate coil with a diameter of Φ90mm. The space is insulated with epoxy resin and glass cloth. The total resistance of the discharge circuit is 0.159Ω, the total inductance is 3.4μH, and the charging time is 5 seconds. A square cone with a length of 350mm, a height of 150mm, and a cone angle of 60°. Such as Figure 5A As shown, the method of reverse electromagnetic progressive stretching is adopted, the electromagnetic forming coil 11 is formed along the inner surface of the model 20, the edge of the plate 12 is fixed by the fixed support 25 and does not fall, and the electromagnetic forming coil 11 relies on the electromagnetic forming from the edge to the center. The force makes the plate 12 gradually formed until the forming...

Embodiment 3

[0041] In the forming device, the pulse energy storage capacitor is 1000μF, and the working voltage is 2500V. The electromagnetic forming coil is made of a copper electromagnetic wire with a specification of 2.2mm×5mm to form a circular densely wound wire plate coil with a diameter of Φ100mm. The space is insulated with epoxy resin and glass cloth, the total resistance of the discharge circuit is 0.115Ω, the total inductance is 2.7μH, the charging time is 5 seconds, the plate is made of OHFC copper, and the thickness is 1.6mm. This example is a shell made in the shape of a ship. Such as Image 6 As shown, the opposite sides of the housing have an angle of 15° relative to the vertical direction, a length of 800 mm, a width of 400 mm, and a height of 300 mm. As in Example 1, the positive electromagnetic progressive stretching method is adopted.

[0042] The specific implementation process is: under the control of the computer, the electromagnetic forming coil 11 first walks to ...

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Abstract

This invention relates to an electromagnetic progressive shaping method for plate moving coils and a device, in which, said device includes a computer control system, an electromagnetic force generation system and a three-shaft digital control shaping system including a plate clamping elevating device, a supporting model frame and an electromagnetic shaping clamping rod, in which, the computer controls the coil to move downward along the contour of a model profile from the top according to the contour data of the model profile and the plate is formed partly relying on the magnetic force of coil till to the bottom of the model and finish the entire process.

Description

technical field [0001] The invention belongs to a metal plate forming method and device, and is particularly suitable for forming various complex-shaped automobile cover parts, complex sheet metal parts of aerospace vehicles, and shells with complex curved surface shapes. Background technique [0002] So far, most of the processing of shell workpieces such as automobile panels is calendered with a press, and the depth of stretching and the complexity of forming are limited; moreover, the manufacturing cost of molds is high and the manufacturing cycle is long. This is a big obstacle for enterprises to develop new products and compete for the market. [0003] Electromagnetic forming technology has the characteristics of easy and precise control of processing energy, fast forming speed, high precision of formed workpiece, simple forming mold and strong versatility of equipment, and the whole forming process is pollution-free. It has been widely used in machinery, electronics, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/4097
Inventor 莫健华黄树槐韩飞
Owner HUAZHONG UNIV OF SCI & TECH
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