公开(公告)号：US20210323039A1

公开(公告)日：2021-10-21

申请号：US17270022

申请日：2019-08-15

Applicant: SMS group GmbH

Inventor： Alexander GOHR ,  Peter THIEVEN

IPC: B21B37/16 ,  B21B17/14

Abstract: A stretch reducing rolling mill for rolling pipes has a plurality of roll stands arranged in series in a conveying direction of a pipe. A wall thickness measuring device determines a wall thickness progression of the pipe prior to rolling. A control unit controls respective rotational speeds of the roll stands. A pipe position measuring device is arranged in front of the roll stands and continuously measures a current longitudinal coordinate of the pipe. The measured values of the longitudinal coordinate of the pipe are transmitted to the control unit. The control unit controls the rotational speeds of the roll stands based on both the determined wall thickness progression and the transmitted measured values of the current longitudinal coordinate of the pipe, in order to compensate for wall thickness variations of the pipe. A stretch reducing rolling mill is designed to carry out the method.

公开(公告)号：US20180169725A1

公开(公告)日：2018-06-21

申请号：US15576628

申请日：2016-07-04

Applicant: SMS GROUP GmbH

Inventor： Hubert STRANK ,  Peter THIEVEN ,  Helge DAEHNDEL

IPC: B21C45/00 ,  B21B17/04 ,  B21B25/04

CPC classification number: B21C45/00 ,  B21B17/04 ,  B21B23/00 ,  B21B25/04 ,  B21C1/26 ,  B21C3/08 ,  B21C5/003

Abstract: The invention relates to a device and a method for producing a pipe (1) from a hollow block (2) which has an opening (3). The device has a rolling mill (30) for rolling the hollow block (2) via a rolling rod (21) introduced into the opening (3) of the hollow block (2), whereby the pipe (1) is produced. A retaining device (70) for retaining the pipe (1) is provided behind the rolling mill (30), and the device is further designed such that the rolling rod (21) can be drawn out of the pipe (1) after the rolling process while the pipe (1) is retained by the retaining device (70).

公开(公告)号：US20220213570A1

公开(公告)日：2022-07-07

申请号：US17604403

申请日：2020-04-14

Applicant: SMS group GmbH

Inventor： Torsten MÜLLER ,  Peter THIEVEN ,  Waldemar VOGEL ,  Stefan ERNST

IPC: C21D9/08 ,  C21D8/10 ,  C21D1/667

Abstract: Cooling device (1) for cooling a seamless, rolled pipe (R) made of a metal, preferably steel, which has a nozzle assembly (10) comprising one or more nozzles (14), which are configured to apply a cooling medium (K), preferably water or a water mixture, to the outer circumferential surface of the pipe (R) while the pipe (R) is transported along a conveying direction (F) through a cooling section of the cooling device (1), wherein the nozzle assembly (10) has an access (Z), via which the pipe (R) can be removed from the cooling section in the radial direction of the pipe (R), preferably upward.

公开(公告)号：US20210379635A1

公开(公告)日：2021-12-09

申请号：US17283267

申请日：2019-10-10

Applicant: SMS GROUP GMBH

Inventor： Alexander GOHR ,  Peter THIEVEN

IPC: B21B37/16

Abstract: A controller (2) and method for controlling a stretch-reducing mill (1) for rolling tubes are presented. The stretch-reducing mill (1) has several roll stands (10) arranged behind one another in a conveying direction (F) of the tubes (R) and at least one outlet-side wall thickness measuring device (20). The controller (2) is set up to receive measurement data from the wall thickness measuring device (20) which identifies one or more outlet-side wall thicknesses (sr) of a tube (R) exiting from the last roll stand (10) and one or more of the received measurement data wall thickness on the inlet-side (sl_t), preferably to determine an inlet-side wall thickness profile of the tube (R) before entering the first roll stand (10), and preferably to calculate and control one or more of the roll stands (10), taking into account the determined inlet-side wall thicknesses (sl_t).

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.