High-strength rivet and manufacturing method thereof

Abstract

The invention relates to a high-strength rivet. The high-strength rivet is structurally divided into a rivet head, a high-strength end and a riveting end. The high-strength end is located between the rivet head and the riveting end. The high-strength end is a main stressed part. The riveting end is a riveting part. The high-strength rivet is manufactured in the steps that the rivet head is upset into shape, and a rod part is machined to a required length according to the requirements of different interlayer thicknesses; the whole rivet is subjected to thermal treatment and reinforcement first to make the tensile strength Sigma b reach more that 1100 MPa; the strength of the riveting end is reduced in a partial regression mode, and the regression length is determined according to the size of the rivet head; the rivet is subjected to annealing treatment in a high-frequency induction heating mode or a laser heating mode or a plasma arc heating mode to make the tensile strength Sigma b lower than 550 MPa, and then the finished high-strength rivet is obtained. Since the same rivet has different strengths through the special thermal treatment method, the riveting connection strength of the rivet is improved, and the rivet also has installation performance and riveting performance of common rivets.

Description

technical field [0001] The invention belongs to the field of mechanical manufacturing, in particular to a high-strength rivet and a manufacturing method thereof. Background technique [0002] Many structural connections in the aerospace industry need to be riveted, and these connection parts require high connection strength. At the same time, the connection space structure is limited, and the structural size of the connection parts cannot be infinitely lengthened. Although ordinary rivets have the function of riveting connection, they cannot meet the structural requirements Therefore, a rivet that can meet the structural strength requirements and has good riveting performance is required. Contents of the invention [0003] The purpose of the present invention is to provide a high-strength rivet and its manufacturing method which can meet the structural strength requirements and have good riveting performance. [0004] A high-strength rivet, its structure is divide...

AI Technical Summary

Problems solved by technology

[0002] Many structural connections in the aerospace industry need to be riveted, and these connection parts require high connection strength. At the same time, the connection space structure is limited, and the structural size of the connection parts cannot be infinitely lengthened. Although ordinary rivets have the function of riveting connection, they cannot meet the structural requirements Strength requirements, so there is a need for a rivet that can meet the structural strength requirements and has good riveting performance

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