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An electromagnetically controlled forming device and method for bending and springback of sheet metal

A technology of electromagnetic control and bending springback, which is applied in the field of plastic forming of materials, can solve the problems of increasing the difficulty and precision of punch production, reducing the service life of punches, and poor free bending accuracy, so as to increase production costs and eliminate stress , The effect of reducing equipment costs

Active Publication Date: 2019-11-05
重庆东矩金属制品有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above springback control method has the following disadvantages: setting the coil in the rounded corner area of ​​the punch will increase the difficulty and precision of the punch, and greatly reduce the service life of the punch
However, the accuracy of free bending is poor, and the bending parts on industrial products such as automobiles and aircrafts often have multiple bending angles and flange structures

Method used

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  • An electromagnetically controlled forming device and method for bending and springback of sheet metal
  • An electromagnetically controlled forming device and method for bending and springback of sheet metal
  • An electromagnetically controlled forming device and method for bending and springback of sheet metal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0055] The sheet material 4 is a high-conductivity material, and the punch 1 is V-shaped.

[0056] refer to Figure 8 , the process is as follows:

[0057] S1. Place the blank 4 to be formed on the die 2, and use the blank holder 3 to clamp the blank 4 between the die 2 and the blank holder 3;

[0058] S2. The punch 1 presses down and bends the sheet material 4 until the bent bottom of the sheet material 4 is close to the axial reverse push coil 5, at this time the distance between the end edge of the sheet material 4 and the radial side push coil 6 increases;

[0059] S3. Place a left radial push drive plate 8 and a right radial push drive plate 9 between the end edge of the sheet material 4 and the radial side push coil 6;

[0060] S4. The axial reverse thrust coil 5 discharges, the bottom of the sheet material 4 moves upward and undergoes reverse bending and high-frequency vibration, so that the residual stress of the fillet at the bottom of the sheet 4 is reduced, and th...

Embodiment 2

[0063] The sheet material 4 is a low-conductivity material, and the punch 1 is V-shaped.

[0064] refer to Figure 9 , the process is as follows:

[0065] S1. Place the blank 4 to be formed on the die 2, and use the blank holder 3 to clamp the blank 4 between the die 2 and the blank holder 3;

[0066] S2. The punch 1 presses down and bends the sheet material 4 until the bent bottom of the sheet material 4 is close to the axial pushing drive plate 7 on the axial reverse thrust coil 5. At this time, the end edge of the sheet material 4 is aligned with the radial side The distance of the push coil 6 increases;

[0067] S3. Place a left radial push drive plate 8 and a right radial push drive plate 9 between the end edge of the sheet material 4 and the radial side push coil 6;

[0068] S4. The axial reverse thrust coil 5 discharges, the bottom of the sheet material 4 moves upward and undergoes reverse bending and high-frequency vibration, so that the residual stress of the fille...

Embodiment 3

[0071] The sheet material 4 is a high-conductivity material, and the punch 1 is U-shaped.

[0072] refer to Figure 10 , its process is consistent with embodiment 1.

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Abstract

An electromagnetic control forming device for bending and springback of a sheet, comprising a punch, a die matched with the punch, a die matched with the punch, and a blank holder matched with the topend surface of the die for pressing the sheet . The device is characterized in that the bottom end surface of the blank holder and the top end surface of the die are arranged with a groove in which is arranged a radial side push coil, a radial side push drive plate is arranged between the outer edge of the sheet and the radial side push coil, and an axial reverse push coil is arranged at the bottom of the die. According to the electromagnetic control forming device and method for bending and springback of a sheet, the invention can control the bending and springback of a sheet, and is particularly suitable for controlling the bending and springback of the sheet with flange and multiple bending angles.

Description

technical field [0001] The invention belongs to the technical field of plastic forming of materials, and in particular relates to an electromagnetically controlled forming device and method for sheet metal bending springback. Background technique [0002] In the bending and forming process of sheet metal parts, the bending springback of the sheet metal is the most common defect, which seriously affects the dimensional accuracy and shape accuracy of the formed parts. In the traditional bending forming process, trial and error and overbending methods are mainly used for process analysis and mold design, which requires multiple debugging and mold repairs to meet the requirements of bending forming accuracy. Therefore, the production efficiency of the product is low, the cost is high, and the production cycle is long, resulting in a huge waste of time and resources. [0003] Electromagnetic pulse forming is a method of high-speed machining of metal workpieces using pulsed magne...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D26/14
CPCB21D26/14
Inventor 崔晓辉张志武
Owner 重庆东矩金属制品有限公司