Acorn-shaped ring groove single-face fastening part and mounting method thereof

Abstract

The invention discloses an acorn-shaped ring groove single-face fastening part and a mounting method thereof. The fastening part comprises a rivet and a sleeve ring, the rivet is composed of a rivet head, a polish rod, a locking groove, a ring groove transition segment and a tail ring groove in sequence, the sleeve ring is composed of a casing pipe and a rail, the rivet tail structure is providedwith multiple side-by-side ring grooves with the diameters reduced in sequence, a fastening part structure is reserved, and designed in a creation manner, particularly, a fillet angle transition structure between the locking groove and the tail ring groove and a fillet angle transition structure in the tail ring groove are designed, an acorn-shaped ring groove structure with the diameter reduced in sequence is particularly designed, the stress concentration phenomenon in the mounting process can be avoided through the structures, rivet damage is avoided, in the mounting process, exerted tension force of a mounting tool to the rivet can be decomposed, the rivet local stress is reduced, meanwhile, the rivet total bearing capacity is improved, it is ensured that the mounting process can be stably carried out, due to a tail straight part, mounting by the mounting tool is facilitated, the rivet and the mounting too can be further protected, and the service life is prolonged.

Description

technical field [0001] The invention belongs to the technical field of riveting, in particular to the design and manufacture of a single-sided rivet riveting fastener with an acorn-shaped ring groove for blind hole connection, and belongs to the riveting category (B21J) and fastener category of metal machining (F16B). Background technique [0002] When installing double-sided riveted pull rivets, insert the rivet into the installation hole from the front side of the connected part, put the collar on the outer periphery of the rivet from the rear side, place the collar head in the front, and place the collar cylinder in the rear; Arrangement The riveter on the rear side of the two connected parts clamps the groove section at the tail of the rivet for riveting. After the riveting is completed, the collar cylinder is deformed and radially pressed against the outer circumference of the rivet's ring groove section, and the collar head is axially pressed against the surface of th...

AI Technical Summary

Problems solved by technology

[0006] When using single groove short tail ring groove rivets for fastening connection, it is necessary to pre-install on both sides of the clamped part, which is not suitable for blind hole operation, and sometimes it is necessary to open a process hole on the clamped part. Some damage; when the blind hole type clamped parts are fastened and connected with the single-sided ring groove rivets, the rivets will undergo large plastic deformation during the process of breaking the rivets, which may damage the clamped parts. The fasteners are damaged, and even the completely deformed riveted joints are loosened

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