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 method for connecting at least two components by a semi-hollow punch rivet, comprising the following steps:

• I. providing a semi-hollow punch rivet by which a joint between the at least two components is establishable which are arranged in a pile above each other, which comprises the following features:
• a. a rivet head having a rivet shaft extending therefrom, which comprises a cylindrical lateral surface,
• b. a blunt rivet foot having a rivet foot front surface which is arranged perpendicular to a longitudinal axis LA of the rivet shaft, wherein said blunt rivet foot is provided at an end of the rivet shaft facing away from the rivet head, and
• c. a shaft cavity which is bell-shaped in an axial cross-section of the rivet shaft extends into the rivet shaft starting at the end facing away from the head, wherein the bell-shaped shaft cavity is formed by
• i. a convex inlet portion starting at a radial inner side of the rivet foot front surface and extending circular arc-shaped with an inlet radius in the direction of the rivet head,
• ii. a linearly extending continuation portion into which the inlet portion transitions tangentially and which is arranged in an acute angle a with respect to the cylindrical lateral surface, and
• iii. a final dome portion, wherein
• d. one of the following is used as rivet material:
• steel or copper.
• II. arranging the at least two components above each other in a pile-shaped arrangement on a die or an anvil and
• III. setting the semi-hollow punch rivet into the at least two components.