Method of attaching a self-locking fixture to a panel and assembly obtained thereby

摘要

A self-attaching fastener and panel assembly wherein the free open end of the tubular barrel portion is coined, collapsed axially, flattened and deformed radially inwardly and outwardly and axially against a panel surrounding the panel opening. The method of installation includes driving the free end of the tubular barrel portion against a substantially planar die surface, deforming an end portion radially, then collapsing an intermediate portion over the radially deformed end portion, flattening the end portion, substantially thickening the tubular barrel portion and forming an annular surface engaging and supporting the panel surrounding the opening. The die member includes an annular moat surrounding a central die post and a planar die surface extending generally perpendicular to the axis of the die button.