SELF INTEGRATING STRUCTURAL INSERT SLEEVE

摘要

A self-integrating insert sleeve assembly, comprising an insert sleeve and an expander pin, for insertion into an aperture of a work piece is provided. Upon installation, the insert sleeve component is incrementally expanded by interaction with the pin, and secured to the aperture of the work piece, such that the resulting aperture of the installed insert sleeve has a predetermined diameter, and the resulting structure now contains compressive residual stresses. Thus, the installed insert sleeve may be employed as a hole repair solution, allowing for the installation of an original size fastener per structural design within a damaged and reconditioned aperture, or simply for enhanced structural fatigue life. The installation of this insert sleeve may be done through various manners, including pull type, push type, and blind type installation processes.

主权项

1. A fastener for insertion into an aperture of a work piece, comprising:
an expander pin having a first pin end and a second pin end opposite the first pin end, the pin comprising:
a main body portion, the main body portion comprising:
a top portion;an initial expander rings section having a series of expander annular rings; anda final expander pin head section integrally connected between the top portion and the initial expander rings section; anda tail portion comprising a push rod section extending from the first pin end to the top portion of the main body portion; and an insert sleeve having a first sleeve end and a second sleeve end, the first sleeve end having a sleeve head, the insert sleeve comprising:
a cylindrical sleeve portion having an outer wall and an inner wall having a series of inner wall annular rings; andan opening, extending between the first sleeve end and the second sleeve end, adapted for receiving the expander pin; and wherein the series of inner wall annular rings are formed into the series of expander annular rings.