Magnetic pulse bending device for controlling U-shaped piece springback and forming method

A bending device and bending forming technology, applied in the field of sheet metal forming, can solve the problems of high production cost, complex structure, and long production cycle, and achieve the effects of improving quality, improving process applicability, and increasing forming limit

Active Publication Date: 2018-11-13
HUAZHONG UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the structure of the above-mentioned forming dies is relatively complicated, the production cycle is long, the production cost is high, and the U-shaped parts still have springback.

Method used

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  • Magnetic pulse bending device for controlling U-shaped piece springback and forming method
  • Magnetic pulse bending device for controlling U-shaped piece springback and forming method
  • Magnetic pulse bending device for controlling U-shaped piece springback and forming method

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Embodiment 1

[0054] In this embodiment, the length of the sheet to be bent is 400 mm, the width is 150 mm, and the thickness is 1.5 mm. The punch radius is 10 mm. The bottom side of the target U-shaped piece is 190 mm long and the straight side is 90 mm long. In this embodiment, the process method of controlling the springback of the U-shaped part based on the magnetic pulse bending of the punch forming mainly includes the following steps:

[0055] 1) Place the sheet material 2 on the punch 1, place the compression block 7 on the sheet material, ensure that the centers of the punch, sheet material, and compression block coincide, and control the hydraulic device 6 to provide the compression block 20KN pressing force to fix the sheet;

[0056] 2) Adjust the three-dimensional mobile platform so that the forming coil moves vertically to a distance of 3 mm from the upper surface of the sheet to ensure that the forming coil is in a better discharge position. Adjust the left and right sliders so...

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Abstract

The invention belongs to the field of metal plate forming, and particularly discloses a magnetic pulse bending device for controlling U-shaped piece springback and a forming method. The bending devicecomprises a forming unit, a compression unit and an adjusting unit, the forming unit comprises a male die and an electromagnetic forming assembly, the male die is used for controlling the bending shape of a to-be-formed plate material, and the electromagnetic forming assembly is used for conducting magnetic pulse bending forming on the plate material; the compression unit is used for applying compression force to a center zone of the bottom of a U-shaped piece; and the adjusting unit is used for adjusting the position of the electromagnetic forming assembly relative to the to-be-formed platematerial. According to the forming method, the magnetic pulse bending device is used for conducting two-step magnetic pulse bending forming, and bending forming of the U-shaped piece is completed. Bymeans of the device and method, the springback phenomenon generated after bending forming of the U-shaped piece can be effectively controlled, and the die structure and the technological flow are greatly simplified.

Description

technical field [0001] The invention belongs to the field of sheet metal forming, and more specifically relates to a magnetic pulse bending device and a forming method for controlling the springback of a U-shaped piece. Background technique [0002] Bending is a common method of sheet metal forming. The forming quality of bent parts has attracted much attention from researchers and production factories. Springback is an inevitable defect in the bending process, which seriously affects the forming accuracy of bent parts. Prediction and control are key to improving the accuracy of bent parts. [0003] The traditional bending forming process mainly adopts the trial and error method and overbending method for process analysis and mold design. The forming accuracy of the bending parts is controlled through multiple debugging and mold repairs, resulting in prolongation of the production cycle and increase in production costs. It is difficult to meet the technical requirements of ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21D26/14
CPCB21D26/14
Inventor 李建军肖望黄亮苏红亮
Owner HUAZHONG UNIV OF SCI & TECH
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