Metal forming device and method

Abstract

The invention discloses a metal forming device and method. The device comprises a metal forming coil, a die, a power source, a blank holder and a constraint cavity for centralizing shock waves generated during high-temperature gasification of the metal forming coil. The die and a workpiece are oppositely put, blank holding force is applied to the flange region of the workpiece through the blank holder, and the forming coil is put between the workpiece and the constraint cavity and connected with the power source. During working, the forming coil senses pulse electromagnetic force in the workpiece region through pulse currents to drive the workpiece to deform; and meanwhile, joule heat is generated in the forming coil region through the pulse currents, the temperature exceeds the melting point of metal so that metal gasification can occur, plasma is generated, the shock waves are generated, and the workpiece is driven to further deform. Pulse electricity and the shock waves generated through through-flow metal plasma gasification are combined, high-speed pulse forming of the metal workpiece is achieved, the machining difficulty and cost of the forming coil are effectively reduced, the requirements of forming on the conductivity of the workpiece are lowered, and the forming capacity is remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of metal forming and manufacturing, and more specifically relates to a high-speed forming device and method driven by pulse electromagnetic force and metal wire (foil) electrified explosion shock wave. Background technique [0002] The rapid development of aerospace, automobile and other fields has put forward higher and higher requirements for the use of light alloy materials. However, light alloy materials such as aluminum alloy have low forming plasticity at room temperature, and the processing effect of traditional processing technology is not ideal. Studies have shown that electromagnetic forming technology can greatly improve metal formability due to factors such as high forming rate, and is an important method to realize the processing of lightweight materials such as aluminum alloy. [0003] At present, the development of electromagnetic forming technology is severely limited by the life of the form...

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Problems solved by technology

[0006] In view of the above defects or improvement needs of the prior art, the present invention provides a metal forming device and method, thereby solving the problem that the existing electromagnetic forming technology is limited by the life of the forming coil and the basic principle of electromagnetic induction, resulting in the formation of easy failure and For the technical problem of low conductivity and low forming efficiency

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