| 摘要 |
In a flow-forming-machine having a rotatable spindle, a rotary drive for the spindle, and a pressure tool fitted to one of the spindle end faces, an axially movable counterpressure support for a workpiece is placed on the pressure tool, the counterpressure support being axially aligned with the spindle and having opposed sides. At least two rotatable pressure rollers are movably guided on a machine frame in a radial direction with respect to the spindle, while a pivot arm is provided on both the sides of the spindle and/or the counterpressure support. Each pivot arm is pivotal around an axis parallel to the longitudinal axis of the spindle by means of a powered drive. At least two pressure rollers are adjustably located on each pivot arm, and one of the pressure rollers is selectively positionable in an operable position and fixable at will for each pivot arm. The spindle together with the rotary drive and the counterpressure support are movable in the axial direction of the spindle relative to the machine frame and to the pressure rollers for executing a forming operation. The pivot arms are "L"-shaped when viewed in the longitudinal direction of the spindle, with the pivotal axis respectively lying at the free end of the short shank of the "L", the powered drive respectively engaging with the free end of the long shank of the "L" and the pressure rollers being arranged in the run of the long shank of the "L". The spindle and the counterpressure support are made in mirror image symmetry.
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