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AssigneesTechnische Universitaet Dresden, Kerb-Konus-Vertriebs-GmbH, Daimler Chrysler AG
InventorsFritz Liebrecht, Georg Donhauser, Reinhard Mauermann, Hartmut Carstensen
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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.
Method for the joining of overlapped parts to be joined of materials with extremely high deformation strength at room temperature using a joining tool consisting of punch, blank holder and die by joining through self-piercing riveting with semi-hollow rivet or solid rivet, or clinch joining respectively, characterized in that a local and time limited heating of the parts to be joined (1a, 1b) takes place in the future forming zone, whereby the heating is performed via the blank holder (5) and the die (4) or elements arranged directly adjacent to said blank holder and die (10/11, 12/13) or directly preceding them (14, 15) and the heating is initiated at the beginning of the joining process or immediately before it and is completed before the beginning of the forming.
Dependencies are inferred from the claim text.