Electromagnetic forming method and device capable of improving forming property and precision of difficult-to-deform material

A technology of forming performance and electromagnetic forming, applied in the field of electromagnetic forming methods and devices, can solve the problems of difficult to greatly improve forming performance, fast deformation speed, difficult to control forming shape, etc., to eliminate forming defects, improve forming performance, and current density. added effect

Pending Publication Date: 2020-11-20
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in traditional electromagnetic forming, the deformation speed of the material under the action of electromagnetic force is too fast, which makes it difficult to control the forming process and achieve precise shape control of parts.
And for difficult-to-deform materials with low electrical conductivity such as titanium alloys and magnesium alloys, it is often necessary to use high-

Method used

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  • Electromagnetic forming method and device capable of improving forming property and precision of difficult-to-deform material
  • Electromagnetic forming method and device capable of improving forming property and precision of difficult-to-deform material
  • Electromagnetic forming method and device capable of improving forming property and precision of difficult-to-deform material

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Example Embodiment

[0044] Method embodiment 1:

[0045] Figure 1 to Figure 4 as well as Figure 11 and 12 It shows the first embodiment of the electromagnetic forming method of the present invention to improve the formability of difficult-to-deform materials, including the following steps:

[0046] S1: Clamp the sheet 1;

[0047] S2: Perform ultra-low temperature treatment on the sheet material 1, so that the sheet material 1 is in an ultra-low temperature environment;

[0048] S3: Pass current to sheet 1 from the edge of sheet 1;

[0049] S4: applying electromagnetic force to the area to be deformed of the sheet material 1, so that an induced current is generated on the sheet material 1, ensuring that the direction of the induced current is consistent with the direction of the current in step S3;

[0050] S5: Deforming the sheet 1 under the ultra-low temperature environment, magnetic field and electric field.

[0051] The electromagnetic forming method for improving the forming performan...

Example Embodiment

[0055] Method embodiment 2:

[0056] Figure 1 to Figure 4 ,as well as Figure 13 It shows the second embodiment of the electromagnetic forming method of the present invention to improve the forming performance of difficult-to-deform materials. The electromagnetic forming method is basically the same as the method embodiment 1, the only difference is that in step S3, direct current is applied to the sheet material 1 , in step S4, the applied electromagnetic force is applied through the delayed pulse current. Sheet 1 is deformed at time t, but the initial current of sheet 1 at time t is not 0 (the initial current value of traditional electromagnetic forming is 0), which is conducive to improving the efficiency of electromagnetic forming of sheet 1. Electromagnetic force can also be applied by simultaneous pulsed current application.

Example Embodiment

[0057] Method embodiment 3:

[0058] like Figure 1 to Figure 6 As shown, the third embodiment of the electromagnetic forming method of the present invention to improve the forming performance of difficult-to-deform materials, the electromagnetic forming method is basically the same as the method embodiment 1, the only difference is: in this embodiment, in step S5, the sheet metal 1 After deformation, apply current (pulse current) and ultra-low temperature environment (spray liquid nitrogen) to the deformed sheet 1 to further improve the performance of the part.

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Abstract

The invention provides an electromagnetic forming method and device capable of improving forming property and precision of a difficult-to-deform material. The method comprises the following steps of S1, clamping a sheet; S2, carrying out ultralow temperature treatment on the sheet and enabling the sheet to be in an ultralow temperature environment; S3, providing a current to the sheet from the edge of the sheet; S4, applying an electromagnetic force to a to-be-deformed area of the sheet so that an induction current is generated on the sheet, and ensuring that the direction of the induction current is consistent with the current direction in the S3; and S5, driving the sheet to deform under actions of the ultralow temperature environment, a magnetic field and an electric field. The device comprises a concave die, an axial coil, a coil fixing plate and an electrode. The axial coil is mounted in the coil fixing plate and is connected to a circuit, the sheet is mounted between the concavedie and the coil fixing plate, the axial coil corresponds to the to-be-deformed area of the sheet, the electrode is clamped at the edge of the sheet and is connected to the circuit, and the sheet is provided with an ultralow temperature spray head on an opposite side of the coil fixing plate. The electromagnetic forming method and device has the advantages of being easy to operate and being capable of improving the forming property of the difficult-to-deform material.

Description

technical field [0001] The invention mainly relates to the field of material forming, in particular to an electromagnetic forming method and device for improving the forming performance and precision of difficult-to-deform materials. Background technique [0002] Electromagnetic forming technology is a high-speed, high-energy, short-time pulse processing technology that uses the electromagnetic force of metal in a strong pulsed magnetic field to cause plastic deformation. Studies have shown that materials under high-speed deformation conditions can obtain higher formability than traditional stamping, and this phenomenon of higher formability is called "high plasticity". Under high-speed impact, the material produces a dynamic behavior different from the quasi-static deformation behavior of the traditional processing method, that is, the material undergoes dynamics such as crystal twinning, tissue phase transition, and adiabatic shear under the impact of deformation elastic w...

Claims

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Application Information

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IPC IPC(8): B21D26/14
CPCB21D26/14
Inventor 崔晓辉肖昂喻海良杜志浩颜子钦夏雯桢
Owner CENT SOUTH UNIV
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