Method for manufacturing internally geared parts
AssigneeDynamit Nobel Aktiengesellschaft
InventorsWilli Zimmermann, Bernd Stein, Jurgen Zimmermann
Life of this patent
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Abstract
A flow-turning process for manufacturing internally geared parts, including a press mandrel (10) comprising a mandrel (1) on which is fitted a forming tool (2) and one or more pressure rollers (3). A workpiece (4) is held between the forming tool (2) or press mandrel (10) and press rollers (3) and undergoes plastic deformation under the force exerted by the press rollers (3). The forming tool comprises chromium- and molybdenum-containing materials and is tempered and surface-hardened, and the distance between the forming tool (2) and the mounting of the press mandrel (10) in the machine is sufficient to permit a degree of deviation (.alpha.) by the forming tool (2) relative to the machine axis (5).
Claims14
Flow turning method for manufacturing parts with internal teeth, comprising:
- providing a pressure mandrel mounted at a mounting location of the mandrel provided at a first end of the mandrel in a machine for rotation of the mandrel about a longitudinally extending machine axis;
- providing a shaping tool mounted on or adjacent a second end of the mandrel opposite the first end;
- providing one or more pressure rolls spaced from the circumference of the shaping tool;
- providing a workpiece between the shaping tool and the one or more pressure rolls;
- rotating the mandrel and applying force to the workpiece by the one or more pressure rolls, whereby the workpiece is plastically deformed by the application of force,
- wherein a distance of the shaping tool from the mounting location of the pressure mandrel is large enough that the shaping tool can undergo a degree of deflection (.alpha.) with respect to the machine axis so that the shaping tool can center itself automatically under the pressure of the one or more pressure rolls applied uniformly around the circumference of the shaping tool by deflection of the mandrel.
Dependencies are inferred from the claim text.