| 20100077826 | METHOD FOR THE PRODUCTION OF AXIALLY SYMMETRICAL WORKPIECES WITH OR WITHOUT A TOOTHED PROFILE - The method according to the invention for producing substantially axially symmetrical workpieces by shaping a starting material uses a die and a rotatable tool, the die being provided with a bore along the central axis thereof. Here the starting material is introduced through the bore of the die and pressed in between the die and the rotating tool such that the starting material flows outward from the central axis according to the contour of the die. The workpiece is thus produced in a single operation. Depending on the requirements for the dimensional accuracy and surface quality, mechanical finishing or calibrations are possible. Due to the material flow in the die and the rotation of the tool, shaping forces which are only small in comparison to conventional methods occur here, and so the requirements made of the tools, and so the expense, are reduced. Since the shaping takes place without cutting, the resulting fibre flow of the finished workpiece is also advantageous and provides the workpiece with better mechanical properties. | 04-01-2010 |
