Self-piercing rivet and self-piercing riveting method and self-piercing riveted joint

US11333187B2 · kind B2 · utility

Assignee

• NEWFREY LLC · US

Inventors

• Steffen Hofmann · Steinfeld, DE
• Paul BARTIG · Gießen, DE
• Frank Wilhelm · Marshfield, US
• Matthias Wissling · Gießen, DE

Key dates

• Filing date: Jan 3, 2020
• Grant date: May 17, 2022
• Expiry date: Nov 21, 2040

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F16H63/42
• WIPO field: Mechanical elements
• WIPO sector: Mechanical engineering

Abstract

A riveted joint comprising: an upper workpiece and a lower workpiece, and a self-piercing rivet. The rivet in an undeformed state, before the creation of the riveted joint, included: a head defining a head diameter (DH); a shank defining a shank diameter (DS); and a foot end opposite the head. Radially outward at the foot end is a flat surface facing away from the head; and an axial recess located radially inward of the flat surface, partly defined in the foot end, open axially away from the head, and frustoconical in longitudinal cross section. The axial recess defining an axial depth (LB). The ratio of recess axial depth (LB) to shank diameter (DS) is less than 0.3. And in a deformed state, after the creation of the riveted joint, the rivet extends through the first workpiece and penetrates the second workpiece; and the head bears against the upper surface.