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An electromagnetic-multi-point composite forming device and forming method for sheet materials

A technology of composite forming and sheet metal, which is applied in the field of sheet metal forming, can solve the problems of increasing the complexity of the forming process, the large distance between the sheet material and the mold, and low forming efficiency, so as to solve the large springback defect, improve the forming efficiency, and reduce the production cost Effect

Active Publication Date: 2021-05-07
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the repeated forming process leads to low forming efficiency, and after each layer of sheet material is drawn, the distance between the sheet material and the mold is relatively large, and the discharge parameters must be precisely controlled to achieve precise fit between the sheet material and the mold , which also increases the complexity of the forming process

Method used

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  • An electromagnetic-multi-point composite forming device and forming method for sheet materials
  • An electromagnetic-multi-point composite forming device and forming method for sheet materials
  • An electromagnetic-multi-point composite forming device and forming method for sheet materials

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Effect test

Embodiment 1

[0050] like Figure 1a-Figure 1d As shown, the embodiment of the present invention first discloses an electromagnetic-multi-point composite forming device for sheet materials, including an upper punch 1 and a lower punch 2, a plurality of upper punches 1 arrayed to form a punch 8, and a plurality of lower punches 1 The die 9 is formed by an array of punches 2, wherein the upper punch 1 and the lower punch 2 are driven to move up and down by a computer-controlled hydraulic cylinder, and the upper coil support rod 3 that can move up and down is arranged in the punch 8. Similarly, the upper coil supports The rod 3 is also driven to move up and down by a hydraulic cylinder. The lower end of the upper coil support rod 3 is provided with an electromagnetic coil 4 that can shape the sheet 7, so that the electromagnetic force of the electromagnetic coil 4 drives the sheet to deform at a high rate. Specifically, in order to ensure that the plate 7 is evenly deformed, the upper coil sup...

Embodiment 2

[0060] like Figure 2a-Figure 2f As shown, the structure of the punch 8 in this implementation is basically the same as that of Embodiment 1, the difference is that in this embodiment, a lower coil support rod 10 that can move up and down is provided in the die 9, and the lower coil support rod The upper end of 10 is provided with an electromagnetic coil 4 capable of forming the plate 7. When the plate 7 is punched, the electromagnetic coil 4 passing through the punch 8 and the die 9 is formed by two discharges. The curved surface formed by the electromagnetic coil 4 on the upper end of the lower punch 2 underside. Therefore, the forming efficiency and forming quality of the plate 7 are further improved through the complementarity of the electromagnetic coils on the punch 8 and the die 9 to the plate 7 .

Embodiment 3

[0062] like Figure 3a As shown, the structure of the punch 8 and the die 9 in this implementation is basically the same as that of Embodiment 2, the difference is that in this embodiment, the electromagnetic coil 4 on the punch 8 and the electromagnetic coil on the die 9 4 are alternately arranged at intervals from the inside to the outside, so that the electromagnetic coil 4 can fully cover the forming surface of the sheet 7, and further improve the forming efficiency and quality of the sheet 7.

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PUM

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Abstract

The invention discloses an electromagnetic-multi-point composite forming device for sheet materials, which includes an upper punch and a lower punch, a plurality of the upper punch arrays form the punch, and a plurality of the lower punch arrays form the punch. The concave mold, the convex mold and / or the concave mold are provided with a coil support rod capable of moving up and down, and an electromagnetic coil capable of shaping the sheet material is provided at the end of the coil support rod close to the sheet material. On the one hand, the present invention can control the position of the upper punch and the lower punch by the computer to form a "flexible mold" with variable shape, so as to realize the rapid forming of plates of different shapes; The amplitude is reduced or even completely eliminated, which improves the quality of sheet forming.

Description

technical field [0001] The invention relates to the technical field of plate forming, in particular to an electromagnetic-multi-point composite forming device for plate and a forming method thereof. Background technique [0002] With the rapid development of high-tech industries such as aerospace, advanced aircraft, spacecraft, rockets, and missiles urgently need to adopt large-size plate-shaped parts with very significant structural benefits to reduce weight, improve the load-carrying capacity limit and range of the carrier, etc. performance. [0003] Plastic forming of large-sized plate parts requires large-scale equipment, such as powerful compression molding with a giant press. At present, developed countries such as the United States, France, and Russia have 450-750MN giant hydraulic presses, and my country has also started the development of 80,000t giant hydraulic presses. But this kind of equipment needs to invest huge sums of money, and the equipment is extremely ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B21D26/14
CPCB21D26/14
Inventor 崔晓辉夏雯桢喻海良颜子钦杜志浩肖昂
Owner CENT SOUTH UNIV
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