For the production of force - or movement over a supporting shaft connections in a form-locking connecting elements are often chosen as an interface. The required geometries may be on the workpiece itself or by joining of separate components are generated. The production variant by way of joining permits a functionally graded choice of material for the carrier tube and the connection end piece, as well as the integration damping spring elements as a functional extension. As a joining methods are previously purely frictional a method by simple pressing or integral method, such as welding or soldering, known. In the case of purely force-locking manner by pressing connected components is the torque which can be transmitted by the contact - and friction forces can be preset, and is greatly limited. In the case of integral method, such as welding or soldering, the choice of material is subject to strict standards. The method according to the invention the circular kneading qualified as a suitable joining methods for the secure the form of - and force-locking connection of two components. By means of the formation of the radial and axial undercuts to be joined to the connecting element, two components by the rising flow force - as well as positively securely connected with one another and are joined. In order in the case of a single helically wound spring elements by means of an unintentional release " to prevent unscrewing ", is by process - and / or working tool-side adaptation of the round bank process locally to a different material flow with as a result of different initial tension, to adjust the solidification.
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