| 摘要 |
The present invention relates to a device and a method for the axial forming of an elongated hollow body, the device (1) being characterized in that it has at least one receptacle (3), a reducing die (4), a punch (5) for pressing the elongated hollow body (2) through the reducing die in the direction of an axis (7), an expanding mandrel (6) and means for limiting the axial displacement of the punch, wherein the punch and the expanding mandrel are movable on the same axis and the expanding mandrel is arranged inside the punch, wherein the hollow body is reduced to a first diameter (10) in a first portion (9) and expanded to a second diameter (12) in a second portion (11) as a result of a movement of the punch and the expanding mandrel in the same direction.
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