Carbon fiber composite material and aluminum alloy material rivetless stamping vibration connection method and its mold

Abstract

The invention provides a carbon fiber composite material and aluminum alloy material non-riveting punching vibration connection method and a die thereof. A connecting piece consisting of a carbon fiber composite plate, a sandwich structure and an aluminum alloy plate is arranged on the upper surfaces of a lower die and a female die, a blank holder is used for fixing the connecting piece, and a lower die heating rod and an upper die heating rod are used for independently heating the female die and the upper die correspondingly to locally control the temperature of the connecting piece. An ultrasonic high-frequency vibrator is started, an upper die punch moves downwards and extrude the connecting piece, and the aluminum alloy plate and the carbon fiber composite plate plastically deform under the action of punching pressure and ultrasonic oscillation. Meanwhile, due to the extrusion of the upper die and the female die and the vibration of ultrasonic waves, resin and carbon fiber in the sandwich structure are rearranged, and aluminum powder and resin are embedded in the plates in wrapping and coating modes. The resin is subjected to curing reaction, and finally the aluminum alloy plate, the sandwich structure and the carbon fiber composite plate are connected and embedded with each other in a hooking mode, so that the aluminum alloy plate and the carbon fiber composite plate are connected with each other.

Description

technical field [0001] The invention belongs to the technical field of material connection, and in particular relates to a method for connecting carbon fiber composite materials and aluminum alloy materials by rivetless stamping vibration and a mold thereof. Background technique [0002] With the rapid development of the automobile industry, the application of automobile lightweight technology is the general trend. Lightweight alternative materials are generally recognized as the most valuable lightweight technology in the industry. Aluminum alloys have been widely used in car bodies, and new materials such as non-metal fiber composite materials are gradually being used in car body manufacturing. For non-metallic fiber composite materials, if the traditional method is used to connect two sheets together, then the cost of a single connection is relatively high. Existing mature technologies such as riveted or bolted joints require high preparation work, transportation costs, ...

AI Technical Summary

Problems solved by technology

However, the traditional stamping connection technology is widely used in the field of metal sheet connection such as steel, aluminum (aluminum alloy) and other coated non-ferrous metals, and the application between metal and composite materials, composite materials and composite materials is not relatively complete and mature. The open theoretical system of stamping connection technology, and the traditional stamping connection method is used for the connection of dissimilar composite materials, which cannot fully play its role for anisotropic composite materials, and the connection method is difficult to realize

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