Patent 7716804 was granted and assigned to BAYERISCHE MOTOREN WERKE AKTIENGESELLSCHAFT on May, 2010 by the United States Patent and Trademark Office.
A method is provided for self-pierce riveting which reduces a setting force required for setting the rivets. For this purpose, a clamping force produced by a clamping device is substituted by the force produced by a rivet on a punch. The clamping force varies within a known magnitude, whereas the setting force is reduced by 20%.