Method and apparatus for the calibrating reduction of the cross-sectional area of a rotating workpiece

摘要

In rotatingly driven rolling heads (4) there are rotatably mounted rolls (5) which revolve planet fashion as the rolling heads revolve and exert a hammering action on the heated workpiece (W) in such a way that the diameter is reduced and material is displaced primarily along the workpiece axis (A). During this process, the workpiece is at least rotated (this is sufficient for necking, for example) and is generally also moved along the workpiece axis (W). The rolling heads (A) can be moved in and out for necking or other changes to the diameter. <IMAGE>