Apparatus and method for stretching and deforming thin metal plates assisted by lateral ultrasonic field

Abstract

The present application relates to a device and method for stretching and deforming a thin metal plate assisted by a lateral ultrasonic field, including an ultrasonic vibrator in contact with a target object to deform the target object, a fixing mechanism for fixing the ultrasonic vibrator, and the The fixing mechanism is docked and used to drive the fixing mechanism and the adjustment mechanism for moving the ultrasonic vibrator. The adjustment mechanism includes an axial adjustment component and a height adjustment component connected to the axial adjustment component; wherein the axial adjustment component Under the action of an external force, it docks with the fixing mechanism so that the fixing mechanism moves axially and drives the ultrasonic vibrator to move axially. By being provided with the axial adjustment component and the height adjustment component, the positional relationship between the ultrasonic vibrator and the target can be adjusted, which is fast and convenient, makes the application of the ultrasonic field more accurate and improves its working efficiency.

Description

technical field [0001] The invention relates to a device and a method for stretching and deforming a metal thin plate assisted by a lateral ultrasonic field, and belongs to the field of mechanical property testing of metal plates. Background technique [0002] Usually, the vibration whose vibration frequency exceeds the limit of human hearing by 20kHz is called ultrasonic vibration. As a sound field, ultrasonic vibration has certain physical energy, and when it is applied to an object, it will produce some obvious physical effects. For example, when the ultrasonic field acts on the metal, the flow stress of the metal will immediately decrease, and the higher the energy density of the ultrasonic field, the more obvious the reduction; when the ultrasonic field action time is relatively short, stop the ultrasonic field action, and the flow stress will immediately recover However, when the ultrasonic field is applied for a long time, depending on the state of the material such ...

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Problems solved by technology

Therefore, the existing test results that the direction of vibration and deformation are consistent cannot guide the situation that the direction is inconsistent

[0003] In addition, for metal sheets with a small thickness, when the clamping end vibration method of tensile deformation is used, the energy transmission loss of the ultrasonic field is relatively large due to the large difference in cross-sectional area between the chuck and the sheet metal sample.

At the same time, during the test, the propagation of the ultrasonic field in the thin metal plate will change. It is no longer a simple longitudinal vibration in one direction, but will produce random vibrations in other directions, and the degree of chaos varies with the thickness of the plate, the length of the tensile sample and Changes in width, etc., thus affecting the accuracy of test results

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