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

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...

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-conductivity materials to drive forming, so that it is more difficult to control the formed shape of titanium alloys and other difficult-to-deform materials, and it is also difficult to greatly improve the formability

Moreover, the electromagnetic drive forming of difficult-to-deform materials often requires greater discharge energy, resulting in a significant increase in the cost of forming

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