CFRP single-side core-pulling lossless riveting fastener and method

Abstract

The invention discloses a CFRP single-side core-pulling lossless riveting fastener and a method. The CFRP single-side core-pulling lossless riveting fastener comprises a shear-resistant riveting fastener body and a tensile riveting fastener body. Wherein the shear-resistant riveting fastener is composed of a rivet with a hole and a shear-resistant core rod, and the tensile riveting fastener is composed of a rivet with a hole, a tensile core rod and a fastening nut; a central through hole is formed in the middle of the rivet with the hole, an upset head section is arranged above the rivet, a rivet rod section is arranged in the middle of the rivet, the diameter of the upset head section is smaller than that of the rivet rod section, a groove is designed between the upset head section and the rivet rod section, and a rivet head is arranged below the rivet. On the basis of a rivet pulling method, through the design of the rivet with the hole, the groove is formed, the diameter of the rivet rod section is larger than that of the upset head section, a buffering and restraining area is provided for deformation of the upset head part, a large amount of deformation acting force of the rivet acts in the groove, and damage to a composite material riveting component is avoided; the anti-shearing capability of the composite material riveting component is improved; and meanwhile, the tensile core rod is designed to be provided with a threaded section and is matched with the fastening nut, so that the tensile performance of the composite material riveting component is improved.

Description

technical field [0001] The invention relates to the technical field of mechanical processing, in particular to a CFRP one-side core-pulling non-destructive riveting fastener and a method thereof. Background technique [0002] Lightweight is one of the important goals of aircraft design at this stage. Advanced composite materials represented by carbon fiber reinforced resin matrix composites (CFRP) have the advantages of high specific strength, high specific stiffness, designability, and integral structural molding. The structure significantly reduces weight and reduces the cost of making the structure, so it is widely used in the aerospace field. In the process of aircraft manufacturing, there are a large number of CFRP connecting members, which are typical weak links of the overall structure. The optimal design of its connecting structure is one of the important research contents of aircraft manufacturing. [0003] At present, the connection methods of CFRP components main...

AI Technical Summary

Problems solved by technology

However, this invention cannot be applied to situations such as one-sided riveting, and the scope of application has certain limitations

The invention with the patent number CN201510889783.8 discloses a blind rivet for composite material connection with adjustable interlayer thickness range, which can rivet the connected parts with different thicknesses, and can be applied to a larger interlayer thickness than the prior art. But it can't solve the problem of riveting damage of composite materials

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