METHOD FOR JOINING WORKPIECE LAYERS AND CONNECTING ELEMENT AND JOINING DEVICE
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United States of America Patent
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Issued Date -
Nov 13, 2014
app pub date -
Mar 15, 2013
filing date -
Mar 31, 2012
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Abstract
A method for joining at least two workpiece layers (1, 2) by introducing a connecting element (10) with a coating (15) applied externally to the connecting element (10), where the connecting element (10) is guided, in particular punched, through the first workpiece layer (1) by a ram (26), forming a cut surface (1), and penetrates at least partially into the second workpiece layer and is deformed by a die (21) such that it connects the at least two workpiece layers (1, 2) together in a form-fitting manner. The connecting element (10) is heated such that the coating (15) applied externally to the connecting element (10) melts and wets, in particular completely closes, the cut surface in the first workpiece layer (1); after a cooling process, the re-solidified coating (15) adheres to the cut surface of the first workpiece layer (1).
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