Device for electric effect decoupling in electromagnetic forming process

Abstract

The invention discloses a device for electric effect decoupling in the electromagnetic forming process. The device comprises a pulse discharge circuit, a magnetic field generator, a field shaper, an electromagnetic shielding module and a driving ring; the pulse discharge circuit is used for providing pulse currents for the magnetic field generator; the magnetic field generator is used for generating a driving magnetic field according to the pulse currents; the field shaper is used for concentrating the driving magnetic field at the vicinity of the driving ring; the electromagnetic shielding module is used for shielding a magnetic field on a workpiece in the axial direction; the driving ring is used for shielding the magnetic field on the workpiece in the radial direction, and the induced currents of the driving ring interact with the driving magnetic field so that electromagnetic force is generated for driving the driving ring and the workpiece to deform simultaneously; induced eddy currents of an electromagnetic field on the workpiece are shielded through the electromagnetic shielding module and the driving ring effectively, and the effect of the current and the high temperature effect generated by the currents are decoupled from the workpiece; and the decoupling of the currents in the electromagnetic forming process is achieved, and the effects of the current and high speed deformation in electromagnetic forming are separated.

Description

technical field [0001] The invention belongs to the technical field of forming, and more specifically relates to a device for decoupling electric effects in the electromagnetic forming process. Background technique [0002] Electromagnetic forming technology is a new high-speed forming method with high speed, high temperature rise and high current at room temperature. Electromagnetic forming can greatly improve the formability of aluminum alloys, magnesium alloys and other light metals that are difficult to form at room temperature. The scope of application of light metals in transportation, aerospace and other fields has accelerated the process of lightweighting in related fields. [0003] However, the electromagnetic forming technology is still in the research stage. During the electromagnetic forming process, the material is subjected to high strain rate, high temperature rise and high current at the same time, and its deformation mechanism is complicated and difficult to...

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Problems solved by technology

[0006] Aiming at the defects of the prior art, the purpose of the present invention is to provide a device for decoupling electrical effects in the electromagnetic forming process, aiming at solving the problem that the current provides a huge electromagnetic force to drive the deformation of the workpiece in the existing electromagnetic forming process. The current itself and the Joule heating effect caused by it have a great influence on the deformation behavior of the material. The effects of current, heat and high-speed deformation are coupled with each other, and the physical process is complex and variable, which makes it difficult to decouple the influence of various physical quantities on the deformation behavior of the material.

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