公开(公告)号：US20210078058A1

公开(公告)日：2021-03-18

申请号：US17054641

申请日：2019-05-08

Applicant: SMS GROUP GMBH

Inventor： Norbert THEELEN ,  Susanne ZELLER ,  Helge DAEHNDEL ,  Alexander GOHR ,  Peter THIEVEN

IPC: B21B17/14

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.

公开(公告)号：US20170312799A1

公开(公告)日：2017-11-02

申请号：US15653612

申请日：2017-07-19

Applicant: SMS group GmbH

Inventor： Mark HAVERKAMP ,  Norbert THEELEN

IPC: B21B38/10

CPC classification number: B21B38/10 ,  B21B38/105

Abstract: A rolling mill, in particular a rolling mill having more than one mill stand, includes at least two rolls which are mounted in a roll bearing in a mill stand to absorb rolling forces, movers for moving at least one roll relative to the mill stand as well as determining devices for determining the roll pass, the determining device having a pass reference and a spatial reference as well as a measuring device for measuring the relative position between the pass reference and the spatial reference. At least one of the pass reference and the spatial reference is arranged peripherally in relation to the power flow occurring between the roll and the mill stand.

公开(公告)号：US20170283897A1

公开(公告)日：2017-10-05

申请号：US15474064

申请日：2017-03-30

Applicant: SMS group GmbH

Inventor： Helge DAEHNDEL ,  Norbert THEELEN

IPC: C21D9/08 ,  B22D13/02 ,  B21B23/00 ,  C21D8/10

Abstract: Sensitive hollow blocks or tubes are elongated in a hot-forming elongator while maintaining, if possible, the internal structure that is present or that forms immediately after casting, and thereby, in the case of suitable method management, even thin-walled tubes or tubes rolled from centrifugally cast hollow blocks can be made available to a sufficiently operationally reliable extent. As a result, for the first time, it is possible for rolled centrifugally cast composite material tubes to be made available and for composite material hollow. blocks produced using centrifugal casting to be utilized for the production of a seamless tube.