Whitesell International Corporation

Randy M Hoffman

Patrick Bolick

A method of attaching a nut to a panel includes forming an aperture in a sheet metal panel by lancing a tab from the sheet metal panel. A root of the tab remains attached to the panel. The method further includes pressing a self-attaching nut into the aperture to attach the self-attaching nut to the sheet metal panel. The tab is bent to substantially prevent material from entering a bore of the nut from a blind side of the panel.

Method of attaching a nut to a panel

A die button for installation of a nut to a panel includes a button body with a panel end, and a cavity defined therein. An aperture is defined in the panel end at a mouth of the cavity. A shearing edge is at a perimeter of the aperture to shear a tab from the panel when a shearing force is applied to the panel by the nut driven by a punch of a press. A relief is in a portion of the perimeter of the aperture to bend a root portion of the panel connecting the tab to the panel without severing the root when the nut applies the shearing force. A reaction member is slidably disposed within the cavity. A resilient member is disposed within the cavity to urge the reaction member toward the panel end, thereby bending the tab to contact the nut and seal a bore.

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South Lyon, MI, United States of America

Randy M Hoffman