Multistage and multidirectional electromagnetic forming method and device

Abstract

The invention provides a multistage and multidirectional electromagnetic forming method comprising the following steps of: establishing a stable magnetic field area by adopting quasi-steady state current; generating induced eddy current in a workpiece by using pulse current; driving the part of the workpiece, which is positioned outside a female die, to be deformed away from the direction of the female die by using an electromagnetic force between the induced eddy current and the pulse current and driving the part of the workpiece, which is positioned inside the female die, to be deformed towards the direction close to the female die; and when the part inside the female die is deformed to an area of a stable magnetic field area, driving the workpiece to do accelerated motion to be attached to the female die under the action of induced eddy current in the stable magnetic field and the woprkpiece to finish the forming. The invention also provides a device for realizing the method, mainly comprising an edge pressing ring and coils arranged at different positions of the female die. According to the method and device disclosed by the invention, the workpiece is accelerated in a multistage and multidirectional electromagnetic forming manner, the forming, the processing and the manufacturing in a longer time and larger space range are realized and the forming depth of the workpiece is effectively increased.

Description

technical field [0001] The invention belongs to the field of forming, processing and manufacturing, and in particular relates to a multi-stage and multi-directional electromagnetic forming method and device, which are mainly used for deep processing and precise forming of metal materials. Background technique [0002] The requirements of energy saving and environmental protection have prompted high-strength lightweight alloy materials represented by aluminum alloys to be widely used in the field of advanced manufacturing. However, the traditional forming technology has encountered major obstacles in the processing and application of high-strength light alloy materials, mainly reflected in the poor plasticity of light alloys, difficulty in forming, and large springback after forming. A new forming technology is urgently needed. [0003] Studies have shown that when forming at a high rate, the formability of the material is significantly improved, and this formability improved...

AI Technical Summary

Problems solved by technology

[0004] However, the traditional electromagnetic forming technology is mainly based on single-machine equipment and low-energy-density processing mode. It is difficult to achieve a single deep processing of the workpiece through the single-pulse electromagnetic force generated by a single coil; the workpiece relies on inertial force to stick to the mold, and the mold-fitting performance is often poor.

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