Low-voltage electromagnet riveting method of metal-composite material combined structure

Abstract

The invention relates to a low-voltage electromagnet riveting method of a metal-composite material combined structure, belonging to the manufacture filed of aviation and space engineering and solving the problems that the traditional riveting technology is difficult to realize the riveting of rivets with high strength, large diameter and large length on the metal-composite material, the metal-composite material combined structure has unstable riveting quality, the riveted structure has short life and the uniform interference riveting forming of rivets with large length cannot be ensured. The low-voltage electromagnet riveting method of the metal-composite material combined structure comprises the following steps: firstly, fixing metals and composite materials on which through holes are drilled; secondly, leading the rivets to pass through the through holes of the metals and the composite materials; thirdly, contacting a rivet head of a rivet gun with one side of a rivet tail and contacting one side of the rivet tail with top iron; and fourthly, giving out a processing signal to the rivet gun by a low-voltage electromagnetic riveting system and finishing the riveting. The invention is applied in the riveting process of the metal-composite material combined structures of large-sized cylinders of large-sized planes and rocket projectile bodies.

Description

technical field [0001] The invention relates to the field of aviation and aerospace engineering manufacturing, in particular to a method for riveting metal and composite materials on cylindrical structural parts such as large aircraft fuselage, wing and large launch vehicle body. Background technique [0002] Many advanced new technologies and new materials are used in the development and production of my country's new generation of large-scale launch vehicle series and large aircraft projects, which put forward stricter requirements for production technology. Metal-composite materials are a material structure that must be used in rocket bodies, large civil aircraft, and new military aircraft. With the improvement of rocket carrying capacity, the acceleration of cruise speed of missile weapons, and the increase of aircraft take-off weight and flight speed, it is necessary to realize the lightweight of materials and structures. The proportion of composite materials has increa...

AI Technical Summary

Problems solved by technology

"A low-voltage electromagnetic riveting device" disclosed in Chinese patent CN2865927 uses a single-gun riveting instead of a double-gun structure, and its equipment uses a parallel-connected large-capacity pulse capacitor bank with a rated voltage of 1kV-1.2kV to achieve low-voltage electromagnetic riveting below 500V, but Its riveting stability is not ideal for metals and composite materials, and it cannot complete the riveting of large diameter rivets

[0004] The riveting equipment and method disclosed in the above-mentioned patents cannot solve the following problems in the development process of a new generation of launch vehicle models and the development and production of large aircraft: (1) cannot meet the requirements for the stability of riveting quality of metal and composite material structures; 2) It is difficult to complete the riveting of high-strength, large-diameter, and long-length rivets to metal-composite materials; (3) The uniform interference riveting of large-length rivets cannot be guaranteed during the riveting process; (4) It is difficult to ensure the structure of metal and composite materials after riveting long life requirements

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