Electromagnetic electro-hydraulic composite forming method and device

Abstract

The invention discloses an electromagnetic electro-hydraulic composite forming method and device, and belongs to the field of metal forming manufacturing. The method comprises the steps that a workpiece is placed on a forming die, and an electromagnetic forming module provided with a forming coil is placed above the workpiece; first pulse current is introduced into the forming coil, so that electromagnetic force is generated on the workpiece through the electromagnetic effect, and the workpiece is driven by the electromagnetic force to deform towards the forming die side; a liquid medium is injected into the workpiece, and an electro-hydraulic forming module is placed on the workpiece; and second pulse current is introduced into the electro-hydraulic forming module, so that explosive shockwaves are generated on the surface of the workpiece through the electro-hydraulic effect, and the workpiece is driven by the explosive shock waves to deform towards the forming die side till the workpiece is attached to the forming die. The liquid medium is injected into the deformed workpiece, the sealing requirement is low, a container for storing the liquid medium does not need to be arranged,the cost and complexity of the device are reduced, electromagnetic forming and electro-hydraulic forming are combined, and the forming depth, deformation uniformity and forming quality are improved.

Description

technical field [0001] The invention belongs to the field of metal forming and manufacturing, and more specifically relates to an electromagnetic-electro-hydraulic composite forming method and device. Background technique [0002] Both electromagnetic forming and electrohydraulic forming are high-speed forming, which have the advantages of increasing material limit, suppressing springback, and reducing device cost. With the development of science and technology, the demand for lightweight and high-strength materials in the automotive and aviation fields has become increasingly strong. Traditional forming methods have problems such as wrinkling and cracking when forming lightweight and high-strength materials (such as aluminum alloys). High-speed forming can solve this problem. [0003] Electromagnetic forming relies on non-contact electromagnetic force to deform the workpiece, with high forming rate and good surface quality. The forming accuracy and mold fit of a single el...

AI Technical Summary

Problems solved by technology

The forming accuracy and mold fit of a single electromagnetic forming are often difficult to meet the requirements of industrial production

For multi-step electromagnetic forming, without changing the position of the electromagnetic forming coil, the electromagnetic force is attenuated due to the large distance between the coil and the workpiece, which makes the efficiency of multi-step forming low and the improvement is limited compared with single forming

In addition, electromagnetic forming also has the problem of easy rebound when it collides with the mold at high speed

The electrode position of electro-hydraulic forming can be moved, and the pressure continues to act during the forming process, which can suppress the rebound phenomenon when the workpiece collides with the mold, but the forming device is relatively complicated, and the forming uniformity is not good

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