Stretch-reducing mill having improved diameter tolerance and wall thickness tolerance

Abstract

A stretch-reducing mill (1) for producing seamless pipes (R), which comprises a plurality of roll stands (10), which are arranged one after the other in a conveying direction (F) of the pipes (R) and each have three rolls (11) arranged at an angular distance of 120°, wherein the roll stands (10) are divided into at least two groups (A, B) each having at least two roll stands (10); the rolls (11) of adjacent roll stands (10) within a group (A, B) are inclined relative to each other by an intra-group angle αI; and the rolls (11) of the roll stands (10) of adjacent groups (A, B) are inclined relative to each other by a group angle αG that is less than the intra-group angle αI.

Dependencies are inferred from the claim text.