| 摘要 |
<p>Especially for increasing the process security and reliability of permanent connections between overlapping materials, a method is suggested for permanently joining overlapping plate-shaped parts, particularly metal sheets, by producing an undercut between the parts in a deforming manner, the method comprising the following steps: disposing the parts to be joined between a protrusion of a punch tool and a support area of a counter-tool, forming a temporary elevation on the side of the parts that faces the counter-tool, by pressing the punch protrusion into the parts to be joined against the support area at least until the parts rise from the support area outside the forming elevation, and forming an undercut in the parts by flattening the elevation between punch tool and counter-tool by the punch tool further approaching the counter-tool. Furthermore, a device is suggested for carrying out said method.</p> |
