Fastening element for friction welding and method for friction welding a fastening element onto a planar workpiece

The invention relates to a fastening element (1) for friction welding to a flat workpiece (2), in particular to a thin-walled sheet metal part, having a nut head (3) and a passage opening (5) extending at least in some regions in the nut head (3), and having a friction welding surface (9) provided on an end face (8) of the nut head (3), the friction welding surface (9) being designed as a frictionwelding surface. A cutting device (4) for introducing a bore (15) into a workpiece (2) is provided on an end face (8) of a nut head (3) having a friction welding surface (9), and to a method for friction welding a fastening element (1) to a flat workpiece (2). 本发明涉及一种用于摩擦焊接到平面工件(2)上、尤其是薄壁钣金零件上的紧固元件(1)，该紧固元件(1)具有螺母头(3)和至少局部地在螺母头(3)内延伸的通孔(5)，以及在螺母头(3)的一端部侧面(8)上设置的摩擦焊接面(9)，其中在具有摩擦焊接面(9)的螺母头(3)的端部侧面(8)上设有用于将钻孔(15)引入工件(2)的切割装置(4)，以及本发明涉及一种将紧固元件(1)摩擦焊接到平面工件(2)上的方法。