Method for Producing a Component Connection from Two Different Materials, and a Corresponding Component Connection

A method for producing a component connection, the method comprising the acts of

• providing a first sheet or plate which is composed of a first material;
• welding a ball or a ball-like element, which is also composed of the first material, onto the first sheet or plate;
• providing a second sheet or plate which is composed of a second material differing from the first material;
• producing a through hole in the second sheet or plate, wherein at least one edge portion or an entire encircling edge of the through hole is bent over or up toward one side of the second sheet or plate, as a result of which at least one clamping collar element is produced;
• assembling the first and second sheets or plates in such a manner that the ball or the ball-like element protruding from the first sheet or plate is introduced from that side of the second sheet or plate which faces away from the at least one clamping collar element into the through hole until the ball or the ball-like element at least partially projects out of the through hole on the side of the at least one clamping collar element;
• and
• welding the second sheet or plate to the ball or to the ball-like element and/or to the first sheet or plate by at least partial fusion of the at least one clamping collar element such that fused second material flows in an undercut region provided between the first sheet or plate and the ball or the ball-like element, and therefore a form-fitting connection is produced in addition to an integrally bonded connection between the ball or the ball-like element and the second sheet or plate and/or the first sheet or plate.