SELF-PIERCING RIVET, ARRANGEMENT WITH A SELF-PIERCING RIVET, AND METHOD FOR FORMING A JOINT IN A STACK OF AT LEAST TWO SHEETS OF MATERIAL
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United States of America Patent
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Aug 23, 2017
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Aug 23, 2016
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Abstract
A self-piercing rivet for joining a stack of at least two sheets of material. The rivet comprises a rivet head rotationally symmetrical to a central axis, and the rivet head includes a top side, a bottom side opposite the top side, and a cylindrical head exterior surface of a head diameter. The rivet head has a thickness (th) along the central axis. The rivet further comprises a rivet shank rotationally symmetrical to the central axis and including a cylindrical shank exterior surface and a cylindrical shank interior surface. The shank interior surface and the bottom side of the rivet head partially define a central shank hole that is open in an axial direction opposite to the bottom side of the rivet head. The rivet has an axial length (La) along the central axis, and the ratio between the head thickness and the axial length is between 1/7 and 1/22.
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