Mechanical joining method, for overlapping parts, uses compression forces for plastic deformation of both auxiliary joining element and overlapping parts.

Abstract
WO2003080270 A UPAB: 20031105 NOVELTY - The mechanical joining method uses a deformable auxiliary joining element (1), e.g. a clinch rivet, which is pressed into the overlapping parts (2,3) by compression forces provided between an axially displaced upper tool (6) operated by a and a cooperating flat lower tool (4), causing plastic deformation of both the joining element and each of the parts. DETAILED DESCRIPTION - A tumble movement may be superimposed on the axial displacement of the upper tool, provided via a mechanical, electromechanical or piezoelectric drive. Also included are INDEPENDENT CLAIMS for the following: (a) a device for providing a mechanical joint between overlapping parts; (b) a joining element for a mechanical joining method USE - The method is used for providing a mechanical joint between 2 flat overlapping parts. ADVANTAGE - Joining process does not require pre-punching.