Bollhoff Verbindungstechnik Gmbh

Mathias Heger

Dennis Henke

Andreas Marxkors

Franz Ferdinand Menne

Daniel Junklewitz

Andreas Jakobsche

A self-piercing rivet for producing a joining connection between at least two components, which comprises the following features: a rivet head and a rivet shank having a central shank bore, wherein the rivet shank comprises a cylindrical shank outer surface and a shank inner surface limiting the central shank bore, and wherein the shank outer surface and the shank inner surface are connected at the axial end of the rivet shank facing away from the rivet head by a flat shank end face and a shank end radius. The shank end radius transitions tangentially into the shank inner surface and the flat shank end face is connected to the shank outer surface by a cutting edge.

Self-piercing rivet

A semi-tubular self-piercing rivet having a rivet head and a rivet shaft, the shaft bore of which satisfies the following relationship in relation to the length of the semi-tubular self-piercing rivet: the total length of the self-piercing rivet Lbeing &#x2264;4 mm. The disclosure further relates to a corresponding self-piercing rivet joint, to a method for producing the self-piercing rivet, and to a method for producing the self-piercing rivet joint.

Semi-tubular self-piercing rivet for thin sheet metal joints, method for producing said semi-tubular self-piercing rivet, and method for producing a joint

The present disclosure provides an adjustment aid for a joining device having a punch and a counter-tool which can be oriented coaxially to one another and can be moved axially towards each other for a joining movement relative to one another. Furthermore, the present disclosure provides a method for adjusting a joining device with a punch and counter-tool. A grid marking is embossed in a reshaped test part with the assistance of an embossable grid marking on a punch surface or on a counter surface of the counter-tool. This grid marking is evaluable in comparison to the discernible impressions of the punch surface and counter surface of the counter-tool.

Adjustment aid for a joining device having a punch and a counter-tool, and method for adjusting the joining device

The present invention discloses a self-piercing rivet (), particularly a semi-hollow self-piercing rivet, with a head () and a shank () as well as a pre-perforated flat element () that is arranged on the shank () and at least part of which extends radially relative to the head () beyond a head radius. A production method and a joining method for said self-piercing rivet with pre-perforated flat element are also described.

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Oerlinghausen, Germany

Mathias Heger