Stepwise rolling of semi-finished metal prods. - in mill using reciprocating stand contg. four roll segments

摘要

The rolls produce a transition zone on the workpiece, consisting of a deformation cone (K) with length (M) appreciably greater than the length (m) of the deformation zone created by the rolls. The workpiece is uniformly rolled so the deformation zones created by all the rolls lie in the same length (m) for the entire redn. during each step. The workpiece is pref. tilted 45 degrees on its longitudinal axis after each rolling step. The pref. rolling mill employs four roll segments located at 90 degrees intervals in a circular row round the workpiece, which is pushed stepwise into the gap formed by the four roll segments. A pendulum rod reciprocates each segment on its axis. System is esp. useful for (non) ferrous metals or alloys which have poor formability.