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, large resistance, etc., and achieve good repeatability and easy energy control and the effect of automated production

Inactive Publication Date: 2006-08-23
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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 radiu

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

Example Embodiment

[0034] Example 1:

[0035] In the forming device, the pulse energy storage capacitor is 56000μF, the working voltage is 400V, and the electromagnetic forming coil is made of copper magnet wire with a size of 2.5mm × 5mm and is made into a circular densely wound wire flat coil with a diameter of Φ70mm. Insulated by 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 AA6061-T6 aluminum alloy, the thickness is 1mm, the initial size is 410mm×410mm, and the bottom is formed. The diameter of the side is Φ350mm, the height is 150mm, and the cone angle is 76°. like Figure 4A As shown, the method of forward electromagnetic progressive stretching is adopted. The electromagnetic forming coil 11 gradually forms the sheet 12 along the outer surface of the model 20 by means of electromagnetic force. done, as Figure 4B shown.

[0036] The specific implementation process is as f...

Example Embodiment

[0037] Example 2:

[0038] In the forming device, the pulse energy storage capacitor is 60μF, the working voltage is 26.9KV, and the electromagnetic forming coil is made of copper magnet wire with a specification of 2mm × 6mm into a circular densely wound wire plate coil with a diameter of Φ90mm, and the forming coil turns between turns Insulated by epoxy resin and glass cloth, the total resistance of the discharge circuit is 0.159Ω, the total inductance is 3.4μH., the charging time is 5 seconds, the plate is SUS304 stainless steel, the thickness is 0.2mm, the initial size is 410mm×410mm, and the bottom edge is formed A square frustum with a side length of 350mm, a height of 150mm and a taper angle of 60°. like Figure 5A As shown, the reverse electromagnetic progressive stretching method is adopted, the electromagnetic forming coil 11 is formed along the inner surface of the mold 20, the edge of the plate 12 is fixed by the fixed support 25 and does not fall, and the electro...

Example Embodiment

[0040] Example 3:

[0041] In the forming device, the pulse energy storage capacitor is 1000μF, the working voltage is 2500V, and the electromagnetic forming coil is made of copper magnet wire with a size of 2.2mm × 5mm and is made into a circular densely wound wire flat coil with a diameter of Φ100mm. It 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 OHFC copper, and the thickness is 1.6mm. like Image 6 As shown, the angle of the opposite side wall portions on the two sides of the casing relative to the vertical direction is 15°, the length is 800mm, the width is 400mm, and the height is 300mm. As in Example 1, the method of forward electromagnetic incremental stretching is adopted.

[0042] The specific implementation process is as follows: under the control of the computer, the electromagnetic forming coil 11 first goes to the designated st...

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