from the design of fig6 the outer wall of the recess 268 is in this embodiment not vertically arranged but rather diverges in the direction towards the end face 264 of the die button 260 the transition from the peripheral wall 284 of the recess into the end face 264 is here likewise formed as a rounded shaping edge 218 fig1 now shows an intermediate stage of the connection of the functional element 210 with the sheet metal part 252 one notes that the planar end face 222 of the head part has pressed the sheet metal material 252 into the ring recess 268 with the sheet metal material starting as a result of the slightly conically shaped peripheral wall 284 of the ring recess 268 to move into the grooves 250 in the lower region of the outer periphery of the head part 214 at the same time the cylindrical projection 272 results in a deformation of the sheet metal material 252 into the hollow cavity 218 the end state can then be seen in fig1 it can initially be seen from this drawing that the sheet metal material 252 has been fully pressed into the recess 268 of the die button 260 with the cylindrical projection 272 having clamped the sheet metal material between its end face 214 at the opposite end face 232 of the cylindrical projection in the hollow cavity 218 of the head part 214 one also notes that during the further closing movement of the tool the ring bead 208 has pressed into the sheet metal material 252 and in conjunction.