METHOD AND DEVICE FOR THERMALLY SUPPORTING MECHANICAL JOINTS

摘要

The invention relates to a method and device for thermally supporting mechanical joints by means of punched rivets with a semi-hollow rivet or a solid rivet or by pounding. The method is characterized in that a local and time limited heating of the joint parts (1a, 1b) occurs by means of electric resistance heating in the future forming zone, whereby the heating is carried out by means of a hold-down device (5) and a matrix (4) or by elements (10/11, 12/13) arranged next to or elements (14, 15) arranged in front of said hold-down device and matrix. The heating is initiated at the start of or immediately before the joining process and is completed before the forming begins.