Forming device without rivet and control method under action of ultrasonic wave and high temperature

Abstract

The invention discloses a forming device without a rivet and a control method under the action of ultrasonic wave and high temperature. The forming device comprises a bottom rotary table, a concave die fixing block, an elastic body, a support base, a plurality of valves, a steel plate, an aluminum alloy plate, a punch and an ultrasonic vibration device, wherein a groove is formed in the middle ofthe bottom rotary table, and the bottom rotary table can rotate around the center; the concave die fixing block is hollow, one end of the concave die fixing block is matched with the interior of the groove, and an opening is formed in the other end of the concave die fixing block; the elastic body is coaxially arranged in the concave die fixing block; the support base is coaxially arranged in theelastic body; one end of the valves are uniformly arranged between the elastic body and the support base along the circumference, and the other ends of the valves extend outside the opening; the steelplate is coaxially arranged above the valves; the aluminum alloy plate is coaxially arranged above the steel plate; the punch is coaxially arranged above the aluminum alloy plate; and the ultrasonicvibration device is fixed to the bottom rotary table and comprises an ultrasonic impact head, the length of the ultrasonic impact head can be adjusted, and the ultrasonic vibration device is arrangedbetween the concave die fixing block and the steel plate.

Description

technical field [0001] The invention relates to the field of rivetless riveting of metals, in particular to a rivetless riveting forming device under the action of ultrasonic waves and high temperature and a control method thereof. Background technique [0002] With the requirement of energy saving, emission reduction and environmental protection in the automobile industry in recent years, the issue of lightweight has been paid more and more attention. In addition to the two methods of using lightweight materials and improving the body structure, lightweight can be achieved by improving the manufacturing process. The rivetless riveting process can realize the connection between multi-layer sheets and different materials, no auxiliary materials are required, no waste gas and waste are generated, and the connection process does not damage the sheet coating, which greatly meets the requirements of lightweight. Used in the connection of body parts. However, when connecting som...

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Problems solved by technology

However, when connecting some high-strength materials with poor plasticity and difficult deformation, such as high-strength steel, the steel plate is difficult to form and easy to crack, and the riveted joint is prone to cracks, which reduces the fatigue strength and joint quality. Usually, the method of heating the plate can be considered However, in the process of connecting dissimilar materials, because different materials are affected by temperature differently, it is difficult to achieve the desired effect only by heating.

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