Bollhoff Verbindungstechnik Gmbh

Franz Ferdinand Menne

Dennis Henke

Andreas Marxkors

Daniel Junklewitz

Mathias Heger

Sergej Erbis

Tim Flügge

Daniel Junklewitz-Reimbold

A semi-hollow punch rivet by which a joint is establishable. The rivet includes: a rivet head having a rivet shaft, which comprises a lateral surface, a rivet foot having a foot front surface is provided at an end of the rivet shaft facing away from the rivet head, the foot front surface is perpendicular to a longitudinal axis Lof the rivet shaft, and a bell-like shaft cavity extends into the rivet shaft beginning at the end facing away from the head. The shaft cavity is formed by: an inlet portion beginning at a radial inner side of the foot front surface and extending arc-shaped with an inlet radius Rin the direction of the rivet head, a linearly extending continuation portion into which the inlet portion transitions tangentially and which is arranged in an acute angle with respect to the lateral surface, and a final dome portion.

Semi-hollow punch rivet, a punch rivet joint of at least two components by means of a semi-hollow punch rivet as well as a method for connecting the components with the semi-hollow punch 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

A self-piercing riveting die for a setting device, by which a self-piercing riveting connection in a plurality of components is establishable by forming a closing head. This self-piercing riveting die may include a main body with an upper side and a recess arranged rotationally symmetrically to the central axis of the self-piercing riveting die formed therein. In the cross-section of the self-piercing riveting die, the recess has a demolding inclination of the demolding section, which radially transitions via a step into a circular arc-shaped lowering of the annular channel section, wherein the circular arc-shaped lowering radially inwardly rises straight-lined or circular arc-shaped or curvilinearally to the die bottom.

Self-piercing rivet die

Growing community of inventors

Bad Lippspringe, Germany

Franz Ferdinand Menne