Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Torsten Draht0
Hans Jörg Lang0
Date of Patent
January 13, 2009
0Patent Application Number
112016670
Date Filed
August 11, 2005
0Patent Primary Examiner
Patent abstract
In a method for joining at least two plate-shaped workpieces by a fastening tool and a device for operating the fastening tool, the fastening tool comprises a punch for exerting a punch force to perform a joining operation and a clamp for exerting a clamping force upon the workpieces at the joining area. During the joining operation the punch exerts a high punch force to perform the joining operation and the clamp exerts substantially no clamping force to allow for free material deformation in the joining area. After the joining operation both the punch and the clamp exert high forces at the same time to reduce any material deformations of the workpieces and to provide for compression of the workpieces in the joining area.
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