Invention Grant
- Patent Title: Method and device for controlling a stretch reducing rolling mill for wall thickness compensation
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Application No.: US17270022Application Date: 2019-08-15
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Publication No.: US11745235B2Publication Date: 2023-09-05
- Inventor: Alexander Gohr , Peter Thieven
- Applicant: SMS group GmbH
- Applicant Address: DE Düsseldorf
- Assignee: SMS group GmbH
- Current Assignee: SMS group GmbH
- Current Assignee Address: DE Düsseldorf
- Agency: Smartpat PLC
- Priority: DE 2018214002.2 2018.08.20
- International Application: PCT/EP2019/071975 2019.08.15
- International Announcement: WO2020/038832A 2020.02.27
- Date entered country: 2021-02-21
- Main IPC: B21B37/16
- IPC: B21B37/16 ; B21B17/14 ; B21B17/04 ; B21B37/78 ; B21B37/46 ; B21B38/04

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.
Public/Granted literature
- US20210323039A1 Method and device for controlling a stretch reducing rolling mill for wall thickness compensation Public/Granted day:2021-10-21
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