| 摘要 |
The invention pertains to a method and forming machine for deforming a hollow workpiece having at least one open end, wherein the workpiece is clamped down in a clamping device, at least one forming tool is placed into contact with the surface of the workpiece, the workpiece and this forming tool are rotated relative to each other about an axis, and the workpiece is deformed by means of the forming tool. During at least part of the deforming, the forming tool is being moved back and forth relative to the axis at a frequency that is substantially equal to or a multiple of the frequency of the rotation of the deformed part or the part to be deformed of the workpiece.
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