Round beads serve to stabilize metal sheets. The creation of such a circular bead can be made very easy with a 3D printed temple die. When printing with PLA or nylon all you have to do is to make sure that the wall thickness of the printed models is around 3mm and the inlay around 40%. This guarantees enough stability to even shape sheet metal steel. Several sizes can be printed in one pass. At the point where the circular bead is to be formed the sheet metal is pre-marked with a punch. First of all a small hole is drilled. Then drill a larger hole with a tapered drill. A hole cutter is used to cut the hole. But it must be large enough that the nearest part of the punch can be used. By tensioning the punch press cuts a corresponding hole in the sheet. The sheet metal is placed on the punch in a press. The counter part is put on. Now the entire package is put under pressure. Alternatively the punch can also be driven together with the hammer. The dimple die is fit together perfectly and presses the sheet metal into the negative shape. When opening the dimple die you can see the perfectly shaped bead with a rounded edge. The process can be repeated with any number of times. Such rounded beads make a metal sheet very stable. The thin sheet shown here can hardly be bent. In comparison the sheet without the beads is very unstable. The 3D parented dimple dies can also be used for steel sheets up to 1.2mm. The procedure here is the same as for aluminium. Only more pressure has to be applied. An additional ring and a trough in the counter part provide additional stability. Here too a high wall thickness in the parented punch is very important. So that the tool made of PLA and nylon receives the appropriate stability. In our case it's again 3mm. Here too the lower part of the tool is placed in the press and the pre-drilled sheet metal is placed on it. The second half of the tool comes last. If the pressure is now applied to the package the template slowly pushes together and presses the sheet into the desired shape. This must not be done too quickly or with too much pressure otherwise the sheet metal may be cut. If you separate the tools half now you can see the raised circular bead around the pressed bead hole. Such beads can be made in different sizes.